110-483: A midden is an old dump for domestic waste . It may consist of animal bones , human excrement , botanical material, mollusc shells , potsherds , lithics (especially debitage ), and other artifacts and ecofacts associated with past human occupation. These features provide a useful resource for archaeologists who wish to study the diets and habits of past societies. Middens with damp, anaerobic conditions can even preserve organic remains in deposits as
220-483: A Catholic mission to convert the population from their original pagan beliefs. Pope Celestine III had called for a crusade against pagans in Northern Europe in 1193. When peaceful means of conversion failed to produce results, Meinhard plotted to convert Livonians by force of arms. At the beginning of the 13th century, Germans ruled large parts of what is currently Latvia. The influx of German crusaders in
330-468: A clear central area. Many are known from Japan and the southeastern United States, and at least one from South America. The word is of Scandinavian via Middle English derivation (from early Scandinavian; Danish: mødding , Swedish regional: mödding ). The word "midden" is still in everyday use in Scotland and has come by extension to refer to anything that is a mess, a muddle, or chaos. The word
440-415: A combination of impermeable liners several metres thick, geologically stable sites and collection systems to contain and capture this leachate. It can then be treated and evaporated. Once a landfill site is full, it is sealed off to prevent precipitation ingress and new leachate formation. However, liners must have a lifespan, be it several hundred years or more. Eventually, any landfill liner could leak, so
550-956: A democratic unitary parliamentary republic . Latvia is a developed country with a high-income , advanced economy ranking 39th in the Human Development Index . It is a member of the European Union , Eurozone , NATO , the Council of Europe , the United Nations , the Council of the Baltic Sea States , the International Monetary Fund , the Nordic-Baltic Eight , the Nordic Investment Bank ,
660-421: A distant location. Some shell middens are directly associated with villages, as a designated village dump site. In other middens, the material is directly associated with a house in the village. Each household would dump its garbage directly outside the house. In all cases, shell middens are extremely complex and very difficult to excavate fully and exactly. The fact that they contain a detailed record of what food
770-805: A few tens of metres long are claimed to be middens, but are in fact shell cheniers (beach ridges) re-worked by nest mound-building birds. Some shell middens are regarded as sacred sites, linked to the Dreamtime , such as those of the Anbarra group of the Burarra people of Arnhem Land . The Ohlone and Coast Miwok peoples built over 425 shell mounds in the San Francisco Bay Area. These mounds were used as: The mounds were constructed over thousands of years. They were often discovered by accident during construction, mining, or farming. Some of
880-704: A golden age in the 16th century. Latgalia , the easternmost region of Latvia, became a part of the Inflanty Voivodeship of the Polish-Lithuanian Commonwealth. In the 17th and early 18th centuries, the Polish–Lithuanian Commonwealth, Sweden , and Russia struggled for supremacy in the eastern Baltic. After the Polish–Swedish War , northern Livonia (including Vidzeme) came under Swedish rule. Riga became
990-578: A handful of individuals, others are many metres in length and width and represent centuries of shell deposition. In Brazil , they are known as sambaquis , having been created over a long period between the 6th millennium BCE and the beginning of European colonisation. European shell middens are primarily found along the Atlantic seaboard and in Denmark and primarily date to the 5th millennium BCE ( Ertebølle and Early Funnel Beaker cultures), containing
1100-845: A power vacuum was created by the Russian Revolution in 1917, followed by the Treaty of Brest-Litovsk between Russia and Germany in March 1918, then the Allied armistice with Germany on 11 November 1918. On 18 November 1918, in Riga, the People's Council of Latvia proclaimed the independence of the new country and Kārlis Ulmanis was entrusted to set up a government and he took the position of prime minister. The General representative of Germany August Winnig formally handed over political power to
1210-421: A regularly used animal toilet area or dunghill , created by many mammals, such as the hyrax , and also serving as a territorial marker. Octopus middens are piles of debris that the octopus piles up to conceal the entrance of its den. Octopus middens are commonly made of rocks, shells, and the bones of prey, although they may contain anything the octopus finds that it can move. Landfill A landfill
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#17327728522941320-798: A second resettlement scheme was agreed. The racially approved being resettled mainly in Poland, being given land and businesses in exchange for the money they had received from the sale of their previous assets. On 5 October 1939, Latvia was forced to accept a "mutual assistance" pact with the Soviet Union, granting the Soviets the right to station between 25,000 and 30,000 troops on Latvian territory. State administrators were murdered and replaced by Soviet cadres. Elections were held with single pro-Soviet candidates listed for many positions. The resulting people's assembly immediately requested admission into
1430-440: A viable and abundant source of materials and energy . In the developing world, waste pickers often scavenge for still-usable materials. In commercial contexts, companies have also discovered landfill sites, and many have begun harvesting materials and energy. Well-known examples include gas-recovery facilities. Other commercial facilities include waste incinerators which have built-in material recovery. This material recovery
1540-476: Is 1,866 km (1,159 mi). The total length of its land boundary is 1,368 km (850 mi), of which 343 km (213 mi) is shared with Estonia to the north, 276 km (171 mi) with the Russian Federation to the east, 161 km (100 mi) with Belarus to the southeast and 588 km (365 mi) with Lithuania to the south. The total length of its maritime boundary
1650-462: Is 498 km (309 mi), which is shared with Estonia, Sweden and Lithuania . Extension from north to south is 210 km (130 mi) and from west to east 450 km (280 mi). Most of Latvia's territory is less than 100 m (330 ft) above sea level . Its largest lake, Lubāns , has an area of 80.7 km (31.2 sq mi), its deepest lake, Drīdzis , is 65.1 m (214 ft) deep. The longest river on Latvian territory
1760-551: Is CO 2 . The gas also contains about 5% molecular nitrogen (N 2 ), less than 1% hydrogen sulfide (H 2 S), and a low concentration of non-methane organic compounds (NMOC) , about 2700 ppmv . Landfill gases can seep out of the landfill and into the surrounding air and soil. Methane is a greenhouse gas , and is flammable and potentially explosive at certain concentrations, which makes it perfect for burning to generate electricity cleanly. Since decomposing plant matter and food waste only release carbon that has been captured from
1870-680: Is a site for the disposal of waste materials. It is the oldest and most common form of waste disposal , although the systematic burial of waste with daily, intermediate and final covers only began in the 1940s. In the past, waste was simply left in piles or thrown into pits (known in archeology as middens ). Landfills take up a lot of land and pose environmental risks. Some landfill sites are used for waste management purposes, such as temporary storage, consolidation and transfer, or for various stages of processing waste material, such as sorting, treatment, or recycling. Unless they are stabilized, landfills may undergo severe shaking or soil liquefaction of
1980-495: Is an archaeological feature consisting mainly of mollusc shells. The Danish term køkkenmøddinger (plural) was first used by Japetus Steenstrup to describe shell heaps and continues to be used by some researchers. A midden, by definition, contains the debris of human activity, and should not be confused with wind- or tide-created beach mounds. Some shell middens are processing remains: areas where aquatic resources were processed directly after harvest and prior to use or storage in
2090-541: Is examining a midden or a beach mound. There are good examples on the Freycinet Peninsula in Tasmania where wave action currently is combining charcoal from forest fire debris with a mix of shells into masses that storms deposit above high-water mark. Shell mounds near Weipa in far north Queensland that are mostly less than 2 metres (6.6 ft) high (although ranging up to 10 metres (33 ft) high) and
2200-654: Is now Latvia by the 1880s. The Young Latvians were largely eclipsed by the New Current , a broad leftist social and political movement, in the 1890s. Popular discontent exploded in the 1905 Russian Revolution , which took a nationalist character in the Baltic provinces . World War I devastated the territory of what became the state of Latvia, and other western parts of the Russian Empire. Demands for self-determination were initially confined to autonomy , until
2310-408: Is now used internationally. The English word "midden" (waste mound) derives from the same Old Norse word that produced the modern Danish one. Shell middens are found in coastal or lakeshore zones all over the world. Consisting mostly of mollusc shells, they are interpreted as being the waste products of meals eaten by nomadic groups or hunting parties. Some are small examples relating to meals had by
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#17327728522942420-548: Is possible through the use of filters ( electro filter , active-carbon and potassium filter, quench, HCl-washer, SO 2 -washer, bottom ash -grating, etc.). In addition to waste reduction and recycling strategies, there are various alternatives to landfills, including waste-to-energy incineration, anaerobic digestion , composting , mechanical biological treatment , pyrolysis and plasma arc gasification . Depending on local economics and incentives, these can be made more financially attractive than landfills. The goal of
2530-671: Is rapidly displaced by CO 2 in the effluent gas. Hydrolysis of the biodegradable fraction of the solid waste begins in the acid formation phase, which leads to rapid accumulation of volatile fatty acids (VFAs) in the leachate. The increased organic acid content decreases the leachate pH from approximately 7.5 to 5.6. During this phase, the decomposition intermediate compounds like the VFAs contribute much chemical oxygen demand (COD). Long-chain volatile organic acids (VOAs) are converted to acetic acid (C 2 H 4 O 2 ), CO 2 , and hydrogen gas (H 2 ). High concentrations of VFAs increase both
2640-577: Is the Gauja , at 452 km (281 mi) in length. The longest river flowing through Latvian territory is the Daugava , which has a total length of 1,005 km (624 mi), of which 352 km (219 mi) is on Latvian territory. Latvia's highest point is Gaiziņkalns , 311.6 m (1,022 ft). The length of Latvia's Baltic coastline is 494 km (307 mi). An inlet of the Baltic Sea,
2750-518: Is the first stage by which wastes are broken down in a landfill. These are followed by four stages of anaerobic degradation. Usually, solid organic material in solid phase decays rapidly as larger organic molecules degrade into smaller molecules. These smaller organic molecules begin to dissolve and move to the liquid phase, followed by hydrolysis of these organic molecules, and the hydrolyzed compounds then undergo transformation and volatilization as carbon dioxide (CO 2 ) and methane (CH 4 ), with rest of
2860-403: Is the longest decomposition phase. The rate of microbiological activity slows during the last phase of waste decomposition as the supply of nutrients limits the chemical reactions, e.g. as bioavailable phosphorus becomes increasingly scarce. CH 4 production almost completely disappears, with O 2 and oxidized species gradually reappearing in the gas wells as O 2 permeates downwardly from
2970-647: Is used by farmers in Britain to describe the place where farm yard manure from cows or other animals is collected. Grants are sometimes available to protect these from rain to avoid runoff and pollution . In the animal kingdom, some species establish ground burrows , also known as middens, that are used mostly for food storage. For example, the North American red squirrel ( Tamiasciurus hudsonicus ) usually has one large active midden in each territory with perhaps an inactive or auxiliary midden. A midden may be
3080-512: The Balts and speak Latvian . Russians are the most prominent minority in the country, at almost a quarter of the population; 37.7% of the population speak Russian as their native tongue. After centuries of Teutonic , Swedish , Polish-Lithuanian , and Russian rule, the independent Republic of Latvia was established on 18 November 1918 after breaking away from the German Empire in
3190-709: The Battle of Daugavpils was a part of the Polish–Soviet War ). A freely elected Constituent assembly convened on 1 May 1920, and adopted a liberal constitution, the Satversme , in February 1922. The constitution was partly suspended by Kārlis Ulmanis after his coup in 1934 but reaffirmed in 1990. Since then, it has been amended and is still in effect in Latvia today. With most of Latvia's industrial base evacuated to
3300-843: The European Film Awards 2014 . On 1 July 2016, Latvia became a member of the OECD . In May 2023, the parliament elected Edgars Rinkēvičs as new President of Latvia , making him the European Union’s first openly gay head of state. After years of debates, Latvia ratified the EU Convention on Preventing and Combating Violence Against Women and Domestic Violence , otherwise known as the Istanbul Convention in November 2023. Latvia lies in Northern Europe, on
3410-491: The European Union (green) – [ Legend ] Latvia ( / ˈ l æ t v i ə / LAT -vee-ə , sometimes / ˈ l ɑː t v i ə / LAHT -vee-ə ; Latvian : Latvija Latvian pronunciation: [ˈlatvija] ), officially the Republic of Latvia , is a country in the Baltic region of Northern Europe . It is one of the three Baltic states , along with Estonia to
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3520-713: The Freikorps formation Eiserne Division ("Iron Division"). Estonian and Latvian forces defeated the Germans at the Battle of Wenden in June 1919, and a massive attack by a predominantly German force—the West Russian Volunteer Army —under Pavel Bermondt-Avalov was repelled in November. Eastern Latvia was cleared of Red Army forces by Latvian and Polish troops in early 1920 (from the Polish perspective
3630-475: The Great Depression . Latvia showed signs of economic recovery, and the electorate had steadily moved toward the centre during the parliamentary period. On 15 May 1934, Ulmanis staged a bloodless coup , establishing a nationalist dictatorship that lasted until 1940. After 1934, Ulmanis established government corporations to buy up private firms with the aim of "Latvianising" the economy. Early in
3740-674: The Great Northern War (1700–1721), up to 40 percent of Latvians died from famine and plague. Half the residents of Riga were killed by plague in 1710–1711 . The capitulation of Estonia and Livonia in 1710 and the Treaty of Nystad , ending the Great Northern War in 1721, gave Vidzeme to Russia (it became part of the Riga Governorate ). The Latgale region remained part of the Polish–Lithuanian Commonwealth as Inflanty Voivodeship until 1772, when it
3850-686: The Hanseatic League . Riga became an important point of east–west trading and formed close cultural links with Western Europe . The first German settlers were knights from northern Germany and citizens of northern German towns who brought their Low German language to the region, which shaped many loanwords in the Latvian language. After the Livonian War (1558–1583), Livonia (Northern Latvia & Southern Estonia) fell under Polish and Lithuanian rule. The southern part of Estonia and
3960-712: The Landfill Allowance Trading Scheme has been established for local authorities to trade landfill quotas in England. A different system operates in Wales where authorities cannot 'trade' amongst themselves, but have allowances known as the Landfill Allowance Scheme. U.S. landfills are regulated by each state's environmental agency, which establishes minimum guidelines; however, none of these standards may fall below those set by
4070-765: The Organisation for Economic Co-operation and Development , the Organization for Security and Co-operation in Europe , and the World Trade Organization . The name Latvija is derived from the name of the ancient Latgalians , one of four Indo-European Baltic tribes (along with Curonians , Selonians and Semigallians ), which formed the ethnic core of modern Latvians together with the Finnic Livonians . Henry of Latvia coined
4180-900: The Supreme Council in the March 1990 democratic elections . On 4 May 1990, the Supreme Council adopted the Declaration on the Restoration of Independence of the Republic of Latvia , and the Latvian SSR was renamed Republic of Latvia. However, the central power in Moscow continued to regard Latvia as a Soviet republic in 1990 and 1991. In January 1991, Soviet political and military forces unsuccessfully tried to overthrow
4290-593: The United States Environmental Protection Agency (EPA). Permitting a landfill generally takes between five and seven years, costs millions of dollars and requires rigorous siting, engineering and environmental studies and demonstrations to ensure local environmental and safety concerns are satisfied. The status of a landfill's microbial community may determine its digestive efficiency. Bacteria that digest plastic have been found in landfills. One can treat landfills as
4400-574: The biochemical oxygen demand (BOD) and VOA concentrations, which initiates H 2 production by fermentative bacteria, which stimulates the growth of H 2 -oxidizing bacteria. The H 2 generation phase is relatively short because it is complete by the end of the acid formation phase. The increase in the biomass of acidogenic bacteria increases the amount of degradation of the waste material and consuming nutrients. Metals, which are generally more water-soluble at lower pH, may become more mobile during this phase, leading to increasing metal concentrations in
4510-803: The landfill gas utilization and generation of electricity . Landfill gas monitoring alerts workers to the presence of a build-up of gases to a harmful level. In some countries, landfill gas recovery is extensive; in the United States, for example, more than 850 landfills have active landfill gas recovery systems. A Solar landfill is a repurposed used landfill that is converted to a solar array solar farm . Landfills in Canada are regulated by provincial environmental agencies and environmental protection legislation. Older facilities tend to fall under current standards and are monitored for leaching . Some former locations have been converted to parkland. In
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4620-942: The latinisations of the country's name, "Lettigallia" and "Lethia", both derived from the Latgalians. The terms inspired the variations on the country's name in Romance languages from "Letonia" and in several Germanic languages from "Lettland". Around 3000 BC, the Proto-Baltic ancestors of the Latvian people settled on the eastern coast of the Baltic Sea . The Balts established trade routes to Rome and Byzantium , trading local amber for precious metals. By 900 AD, four distinct Baltic tribes inhabited Latvia: Curonians , Latgalians , Selonians , Semigallians (in Latvian: kurši , latgaļi , sēļi and zemgaļi ), as well as
4730-474: The prewar currency . Albeit having experienced a difficult transition to a liberal economy and its re-orientation toward Western Europe, Latvia is one of the fastest growing economies in the European Union. In November 2013, the roof collapsed at a shopping center in Riga, causing Latvia’s worst post-independence disaster with the deaths of 54 rush hour shoppers and rescue personnel. In 2014, Riga
4840-603: The zero waste concept is to minimize landfill volume. Countries including Germany , Austria , Sweden , Denmark , Belgium , the Netherlands , and Switzerland , have banned the disposal of untreated waste in landfills. In these countries, only certain hazardous wastes, fly ashes from incineration or the stabilized output of mechanical biological treatment plants may still be deposited. Latvia – in Europe (green & dark grey) – in
4950-655: The 12th century. The first missionaries, sent by the Pope, sailed up the Daugava River in the late 12th century, seeking converts. The local people, however, did not convert to Christianity as readily as the Church had hoped. German crusaders were sent, or more likely decided to go of their own accord as they were known to do. Saint Meinhard of Segeberg arrived in Ikšķile , in 1184, traveling with merchants to Livonia , on
5060-566: The 20th century, but gained wide use in the 1960s and 1970s, in an effort to eliminate open dumps and other "unsanitary" waste disposal practices. The sanitary landfill is an engineered facility that separates and confines waste. Sanitary landfills are intended as biological reactors ( bioreactors ) in which microbes will break down complex organic waste into simpler, less toxic compounds over time. These reactors must be designed and operated according to regulatory standards and guidelines (See environmental engineering ). Usually, aerobic decomposition
5170-676: The Couronians, Semigallians, Selonians, Livs, and northern Latgallians assimilated to form the Latvian people , speaking one Latvian language . Throughout all the centuries, however, an actual Latvian state had not been established, so the borders and definitions of who exactly fell within that group are largely subjective. Meanwhile, largely isolated from the rest of Latvia, southern Latgallians adopted Catholicism under Polish/ Jesuit influence. The native dialect remained distinct, although it acquired many Polish and Russian loanwords. During
5280-468: The European Union, individual states are obliged to enact legislation to comply with the requirements and obligations of the European Landfill Directive . The majority of EU member states have laws banning or severely restricting the disposal of household trash via landfills. Landfilling is currently the major method of municipal waste disposal in India. India also has Asia's largest dumping ground in Deonar, Mumbai. However, issues frequently arise due to
5390-424: The Finnic tribe of Livonians ( lībieši ) speaking a Finnic language. In the 12th century in the territory of Latvia, there were lands with their rulers: Vanema , Ventava , Bandava , Piemare , Duvzare , Sēlija , Koknese , Jersika , Tālava and Adzele . Although the local people had contact with the outside world for centuries, they became more fully integrated into the European socio-political system in
5500-419: The Germans, began to fight against the new occupier. Anywhere from 120,000 to as many as 300,000 Latvians took refuge from the Soviet army by fleeing to Germany and Sweden. Most sources count 200,000 to 250,000 refugees leaving Latvia, with perhaps as many as 80,000 to 100,000 of them recaptured by the Soviets or, during few months immediately after the end of war, returned by the West. The Soviets reoccupied
5610-420: The Latvian Provisional Government on 26 November. On 18 November, the Latvian People's Council entrusted him to set up the government. He took the office of Minister of Agriculture from 18 November to 19 December. He took a position of prime minister from 19 November 1918 to 13 July 1919. The war of independence that followed was part of a general chaotic period of civil and new border wars in Eastern Europe. By
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#17327728522945720-521: The Protestant religion of the inhabitants. During the 19th century, the social structure changed dramatically. A class of independent farmers established itself after reforms allowed the peasants to repurchase their land, but many landless peasants remained, quite a lot Latvians left for the cities and sought for education, industrial jobs. There also developed a growing urban proletariat and an increasingly influential Latvian bourgeoisie . The Young Latvian ( Latvian : Jaunlatvieši ) movement laid
5830-427: The Red Army which helped the Germans. By 29 June Riga was reached and with Soviet troops killed, captured or retreating, Latvia was left under the control of German forces by early July. The occupation was followed immediately by SS Einsatzgruppen troops, who were to act in accordance with the Nazi Generalplan Ost that required the population of Latvia to be cut by 50 percent. Under German occupation, Latvia
5940-435: The Republic of Latvia authorities by occupying the central publishing house in Riga and establishing a Committee of National Salvation to usurp governmental functions. During the transitional period, Moscow maintained many central Soviet state authorities in Latvia. The Popular Front of Latvia advocated that all permanent residents be eligible for Latvian citizenship, however, universal citizenship for all permanent residents
6050-405: The Soviet KGB. 'The publication, which followed two decades of public debate and the passage of a special law, revealed the names, code names, birthplaces and other data on active and former KGB agents as of 1991, the year Latvia regained its independence from the Soviet Union.' In the second half of the 1980s, Soviet leader Mikhail Gorbachev started to introduce political and economic reforms in
6160-409: The Soviet Union that were called glasnost and perestroika . In the summer of 1987, the first large demonstrations were held in Riga at the Freedom Monument —a symbol of independence. In the summer of 1988, a national movement, coalescing in the Popular Front of Latvia , was opposed by the Interfront . The Latvian SSR, along with the other Baltic Republics was allowed greater autonomy, and in 1988,
6270-555: The Soviet sphere. A week later, on 1 September 1939, Germany invaded Poland ; on 17 September, the Soviet Union invaded Poland as well . After the conclusion of the Molotov-Ribbentrop Pact, most of the Baltic Germans left Latvia by agreement between Ulmanis's government and Nazi Germany under the Heim ins Reich programme. In total 50,000 Baltic Germans left by the deadline of December 1939, with 1,600 remaining to conclude business and 13,000 choosing to remain in Latvia. Most of those who remained left for Germany in summer 1940, when
6380-415: The Soviets in 1944, which formed the Latvian SSR for the next 45 years. As a result of extensive immigration during the Soviet occupation, ethnic Russians became the most prominent minority in the country. The peaceful Singing Revolution started in 1987 among the Baltic Soviet republics and ended with the restoration of both de facto and official independence on 21 August 1991. Latvia has since been
6490-594: The USSR, which the Soviet Union granted. Latvia, then a puppet government, was headed by Augusts Kirhenšteins . The Soviet Union incorporated Latvia on 5 August 1940, as the Latvian Soviet Socialist Republic . The Soviets dealt harshly with their opponents – prior to Operation Barbarossa , in less than a year, at least 34,250 Latvians were deported or killed. Most were deported to Siberia where deaths were estimated at 40 percent. On 22 June 1941, German troops attacked Soviet forces in Operation Barbarossa. There were some spontaneous uprisings by Latvians against
6600-428: The West. There was a pause in fighting, apart from partisan activity, until after the siege of Leningrad ended in January 1944, and the Soviet troops advanced, entering Latvia in July and eventually capturing Riga on 13 October 1944. More than 200,000 Latvian citizens died during World War II, including approximately 75,000 Latvian Jews murdered during the Nazi occupation. Latvian soldiers fought on both sides of
6710-403: The aftermath of World War I . The country became increasingly autocratic after the coup in 1934 established the dictatorship of Kārlis Ulmanis . Latvia's de facto independence was interrupted at the outset of World War II , beginning with Latvia's forcible incorporation into the Soviet Union , followed by the invasion and occupation by Nazi Germany in 1941 and the re-occupation by
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#17327728522946820-415: The age of landfill, type of waste, moisture content and other factors. For example, the maximum amount of landfill gas produced can be illustrated a simplified net reaction of diethyl oxalate that accounts for these simultaneous reactions: 4 C 6 H 10 O 4 + 6 H 2 O → 13 CH 4 + 11 CO 2 On average, about half of the volumetric concentration of landfill gas is CH 4 and slightly less than half
6930-413: The alarming growth rate of landfills and poor management by authorities. On and under surface fires have been commonly seen in the Indian landfills over the last few years. Landfilling practices in the UK have had to change in recent years to meet the challenges of the European Landfill Directive . The UK now imposes landfill tax upon biodegradable waste which is put into landfills. In addition to this
7040-419: The anti-Soviet partisan activity. Between 136,000 and 190,000 Latvians, depending on the sources, were imprisoned or deported to Soviet concentration camps (the Gulag ) in the post-war years from 1945 to 1952. In the post-war period, Latvia was made to adopt Soviet farming methods. Rural areas were forced into collectivization . An extensive program to impose bilingualism was initiated in Latvia, limiting
7150-510: The atmosphere through photosynthesis, no new carbon enters the carbon cycle and the atmospheric concentration of CO 2 is not affected. Carbon dioxide traps heat in the atmosphere, contributing to climate change . In properly managed landfills, gas is collected and flared or recovered for landfill gas utilization . Poorly run landfills may become nuisances because of vectors such as rats and flies which can spread infectious diseases . The occurrence of such vectors can be mitigated through
7260-568: The capital of Swedish Livonia and the largest city in the entire Swedish Empire. Fighting continued sporadically between Sweden and Poland until the Truce of Altmark in 1629. In Latvia, the Swedish period is generally remembered as positive; serfdom was eased, a network of schools was established for the peasantry, and the power of the regional barons was diminished. Several important cultural changes occurred during this time. Under Swedish and largely German rule, western Latvia adopted Lutheranism as its main religion. The ancient tribes of
7370-437: The coast and are several meters deep. The midden in Namu, British Columbia is over 9 metres (30 ft) deep and spans over 10,000 years of continuous occupation. Shell middens created in coastal regions of Australia by Indigenous Australians exist in Australia today. Middens provide evidence of prior occupation and are generally protected from mining and other developments. One must exercise caution in deciding whether one
7480-418: The compacted waste and the cover material is called a daily cell. Waste compaction is critical to extending the life of the landfill. Factors such as waste compressibility, waste-layer thickness and the number of passes of the compactor over the waste affect the waste densities. The term landfill is usually shorthand for a municipal landfill or sanitary landfill. These facilities were first introduced early in
7590-595: The conflict, mainly on the German side, with 140,000 men in the Latvian Legion of the Waffen-SS , The 308th Latvian Rifle Division was formed by the Red Army in 1944. On occasions, especially in 1944, opposing Latvian troops faced each other in battle. In the 23rd block of the Vorverker cemetery, a monument was erected after the Second World War for the people of Latvia who had died in Lübeck from 1945 to 1950. In 1944, when Soviet military advances reached Latvia, heavy fighting took place in Latvia between German and Soviet troops, which ended in another German defeat. In
7700-413: The country in 1944–1945, and further deportations followed as the country was collectivised and Sovietised . On 25 March 1949, 43,000 rural residents (" kulaks ") and Latvian nationalists were deported to Siberia in a sweeping Operation Priboi in all three Baltic states , which was carefully planned and approved in Moscow already on 29 January 1949. This operation had the desired effect of reducing
7810-451: The course of the war, both occupying forces conscripted Latvians into their armies, in this way increasing the loss of the nation's "live resources". In 1944, part of the Latvian territory once more came under Soviet control. The Soviets immediately began to reinstate the Soviet system. After the German surrender, it became clear that Soviet forces were there to stay, and Latvian national partisans , soon joined by some who had collaborated with
7920-513: The debris of daily life are tossed on the pile. Each individual toss will contribute a different mix of materials depending upon the activity associated with that particular toss. During the course of deposition sedimentary material is deposited as well. Different mechanisms, from wind and water to animal digs, create a matrix which can also be analysed to provide seasonal and climatic information. In some middens individual dumps of material can be discerned and analysed. A shell midden or shell mound
8030-634: The eastern shores of the Baltic Sea and northwestern part of the East European Craton (EEC), between latitudes 55° and 58° N (a small area is north of 58°), and longitudes 21° and 29° E (a small area is west of 21°). Latvia has a total area of 64,559 km (24,926 sq mi) of which 62,157 km (23,999 sq mi) land, 18,159 km (7,011 sq mi) agricultural land, 34,964 km (13,500 sq mi) forest land and 2,402 km (927 sq mi) inland water. The total length of Latvia's boundary
8140-1050: The ethnic Latvian population had fallen to 62%. Since Latvia had maintained a well-developed infrastructure and educated specialists, Moscow decided to base some of the Soviet Union's most advanced manufacturing in Latvia. New industry was created in Latvia, including a major machinery factory RAF in Jelgava , electrotechnical factories in Riga , chemical factories in Daugavpils , Valmiera and Olaine —and some food and oil processing plants. Latvia manufactured trains, ships, minibuses, mopeds, telephones, radios and hi-fi systems, electrical and diesel engines, textiles, furniture, clothing, bags and luggage, shoes, musical instruments, home appliances, watches, tools and equipment, aviation and agricultural equipment and long list of other goods. Latvia had its own film industry and musical records factory (LPs). However, there were not enough people to operate
8250-607: The first archaeological excavations of the Omori Shell Mounds in Tokyo, Japan in 1877, which led to the discovery of a style of pottery described as "cord-marked", translated as " Jōmon ", which came to be used to refer to the early period of Japanese history when this style of pottery was produced. Shell middens were studied in Denmark in the latter half of the 19th century. The Danish word køkkenmødding (kitchen mound)
8360-529: The former Soviet block state and was active in Latvia joining both NATO and the European Union in 2004. Latvia signed the Schengen agreement on 16 April 2003 and started its implementation on 21 December 2007. Approximately 72% of Latvian citizens are Latvian, while 20% are Russian. The government denationalized private property confiscated by the Soviets, returning it or compensating the owners for it, and privatized most state-owned industries, reintroducing
8470-436: The ground around landfills must be tested for leachate to prevent pollutants from contaminating groundwater . Rotting food and other decaying organic waste create decomposition gases , especially CO 2 and CH 4 from aerobic and anaerobic decomposition, respectively. Both processes occur simultaneously in different parts of a landfill. In addition to available O 2 , the fraction of gas constituents will vary, depending on
8580-525: The ground during an earthquake . Once full, the area over a landfill site may be reclaimed for other uses. Operators of well-run landfills for non-hazardous waste meet predefined specifications by applying techniques to: They can also cover waste (usually daily) with layers of soil or other types of material such as woodchips and fine particles. During landfill operations, a scale or weighbridge may weigh waste collection vehicles on arrival and personnel may inspect loads for wastes that do not accord with
8690-670: The groundwork for nationalism from the middle of the century, many of its leaders looking to the Slavophiles for support against the prevailing German-dominated social order. The rise in use of the Latvian language in literature and society became known as the First National Awakening . Russification began in Latgale after the Polish led the January Uprising in 1863: this spread to the rest of what
8800-400: The interior of Russia in 1915, radical land reform was the central political question for the young state. In 1897, 61.2% of the rural population had been landless; by 1936, that percentage had been reduced to 18%. By 1923, the extent of cultivated land surpassed the pre-war level. Innovation and rising productivity led to rapid growth of the economy, but it soon suffered from the effects of
8910-427: The landfill bioreactor strata gradually decreases. Microbial populations grow, density increases. Aerobic biodegradation dominates, i.e. the primary electron acceptor is O 2 . The O 2 is rapidly degraded by the existing microbial populations. The decreasing O 2 leads to less aerobic and more anaerobic conditions in the layers. The primary electron acceptors during transition are nitrates and sulphates since O 2
9020-469: The landfill can be significant and can be mitigated by wheel washing systems . Pollution of the local environment , such as contamination of groundwater or aquifers or soil contamination may occur, as well. When precipitation falls on open landfills, water percolates through the garbage and becomes contaminated with suspended and dissolved material, forming leachate. If this is not contained it can contaminate groundwater. All modern landfill sites use
9130-451: The landfill's waste-acceptance criteria. Afterward, the waste collection vehicles use the existing road network on their way to the tipping face or working front, where they unload their contents. After loads are deposited, compactors or bulldozers can spread and compact the waste on the working face. Before leaving the landfill boundaries, the waste collection vehicles may pass through a wheel-cleaning facility. If necessary, they return to
9240-639: The largest mounds in the Bay Area include: Emeryville Shellmound Located between Oakland and Berkeley, this mound was estimated to be 60 feet high and 350 feet in diameter. It was demolished in 1924. Huichuin Located in Berkeley, this mound was 20 feet high and was the site of the first human settlement on the shores of San Francisco Bay. West Berkeley and Ellis Landing These mounds measured almost 200 meters in diameter and rose 9 meters above
9350-605: The largest port in the Russian Empire), railways built; new factories, banks, and a university were established; many residential, public (theatres and museums), and school buildings were erected; new parks formed; and so on. Riga's boulevards and some streets outside the Old Town date from this period. Numeracy was also higher in the Livonian and Courlandian parts of the Russian Empire, which may have been influenced by
9460-459: The leachate. The acid formation phase intermediary products (e.g., acetic, propionic, and butyric acids) are converted to CH 4 and CO 2 by methanogenic microorganisms. As VFAs are metabolized by the methanogens, the landfill water pH returns to neutrality. The leachate's organic strength, expressed as oxygen demand, decreases at a rapid rate with increases in CH 4 and CO 2 gas production. This
9570-537: The morning of 24 August 1939, the Soviet Union and Nazi Germany signed a 10-year non-aggression pact, called the Molotov–Ribbentrop Pact . The pact contained a secret protocol, revealed only after Germany's defeat in 1945, according to which the states of Northern and Eastern Europe were divided into German and Soviet " spheres of influence ". In the north, Latvia, Finland and Estonia were assigned to
9680-492: The newly built factories. To maintain and expand industrial production, skilled workers were migrating from all over the Soviet Union, decreasing the proportion of ethnic Latvians in the republic. The population of Latvia reached its peak in 1990 at just under 2.7 million people. In late 2018 the National Archives of Latvia released a full alphabetical index of some 10,000 people recruited as agents or informants by
9790-403: The north and Lithuania to the south. It borders Russia to the east and Belarus to the southeast, and shares a maritime border with Sweden to the west. Latvia covers an area of 64,589 km (24,938 sq mi), with a population of 1.9 million. The country has a temperate seasonal climate . Its capital and largest city is Riga . Latvians belong to the ethnolinguistic group of
9900-675: The northern part of Latvia were ceded to the Grand Duchy of Lithuania and formed into the Duchy of Livonia ( Ducatus Livoniae Ultradunensis ). Gotthard Kettler , the last Master of the Order of Livonia , formed the Duchy of Courland and Semigallia . Though the duchy was a vassal state to the Lithuanian Grand Duchy and later of the Polish and Lithuanian commonwealth, it retained a considerable degree of autonomy and experienced
10010-751: The old pre-war Flag of Latvia flew again, replacing the Soviet Latvian flag as the official flag in 1990. In 1989, the Supreme Soviet of the USSR adopted a resolution on the Occupation of the Baltic states , in which it declared the occupation "not in accordance with law", and not the "will of the Soviet people". Pro-independence Popular Front of Latvia candidates gained a two-thirds majority in
10120-516: The population. They have no citizenship of any country , and cannot participate in the parliamentary elections. Children born to non-nationals after the re-establishment of independence are automatically entitled to citizenship. The Republic of Latvia declared the end of the transitional period and restored full independence on 21 August 1991, in the aftermath of the failed Soviet coup attempt . Latvia resumed diplomatic relations with Western states, including Sweden. The Saeima , Latvia's parliament,
10230-568: The present-day Latvian territory especially increased in the second half of the 13th century following the decline and fall of the Crusader States in the Middle East . Together with southern Estonia, these conquered areas formed the crusader state that became known as Terra Mariana ( Medieval Latin for "Land of Mary ") or Livonia. In 1282, Riga, and later the cities of Cēsis , Limbaži , Koknese and Valmiera , became part of
10340-658: The remains of the earliest Neolithisation process (pottery, cereals and domestic animals). Younger shell middens are found in Latvia (associated with Comb Ware ceramics), Sweden (associated with Pitted Ware ceramics), the Netherlands (associated with Corded Ware ceramics) and Schleswig-Holstein ( Late Neolithic and Iron Age ). All these are examples where communities practised a mixed farming and hunting/gathering economy. On Canada 's west coast, there are shell middens that run for more than 1 kilometre (0.6 mi) along
10450-523: The serfs took place in Courland in 1817 and in Vidzeme in 1819. In practice, however, the emancipation was actually advantageous to the landowners and nobility, as it dispossessed peasants of their land without compensation, forcing them to return to work at the estates "of their own free will". During these two centuries Latvia experienced economic and construction boom – ports were expanded (Riga became
10560-673: The shoreline. Shell mounds are also credited with the creation of tropical hardwood hammocks , one example being the Otter Mound Preserve in Florida , where shell deposits from Calusa natives provided flood free high areas in otherwise large watered areas. There are instances in which shell middens may have doubled as areas of ceremonial construction or ritual significance. The Woodland period Crystal River site provides an example of this phenomenon. Some shell mounds, known as shell rings , are circular or open arcs with
10670-821: The spring of 1919, there were actually three governments: the Provisional government headed by Kārlis Ulmanis , supported by the Tautas padome and the Inter-Allied Commission of Control ; the Latvian Soviet government led by Pēteris Stučka , supported by the Red Army ; and the Provisional government headed by Andrievs Niedra , supported by Baltic-German forces composed of the Baltische Landeswehr ("Baltic Defence Force") and
10780-531: The troposphere. This transforms the oxidation–reduction potential (ORP) in the leachate toward oxidative processes. The residual organic materials may incrementally be converted to the gas phase, and as organic matter is composted; i.e. the organic matter is converted to humic -like compounds. Landfills have the potential to cause a number of issues. Infrastructure disruption, such as damage to access roads by heavy vehicles, may occur. Pollution of local roads and watercourses from wheels on vehicles when they leave
10890-432: The use of daily cover . Other potential issues include wildlife disruption due to occupation of habitat and animal health disruption caused by consuming waste from landfills, dust, odor, noise pollution , and reduced local property values. Gases are produced in landfills due to the anaerobic digestion by microbes. In a properly managed landfill, this gas is collected and used. Its uses range from simple flaring to
11000-468: The use of Latvian language in official uses in favor of using Russian as the main language. All of the minority schools (Jewish, Polish, Belarusian, Estonian, Lithuanian) were closed down leaving only two media of instructions in the schools: Latvian and Russian. An influx of new colonists, including laborers, administrators, military personnel and their dependents from Russia and other Soviet republics started. By 1959 about 400,000 Russian settlers arrived and
11110-404: The waste depend on how well microbial populations function in syntrophy , i.e. an interaction of different populations to provide each other's nutritional needs.: The life cycle of a municipal landfill undergoes five distinct phases: As the waste is placed in the landfill, the void spaces contain high volumes of molecular oxygen (O 2 ). With added and compacted wastes, the O 2 content of
11220-435: The waste remaining in solid and liquid phases. During the early phases, little material volume reaches the leachate , as the biodegradable organic matter of the waste undergoes a rapid decrease in volume. Meanwhile, the leachate's chemical oxygen demand increases with increasing concentrations of the more recalcitrant compounds compared to the more reactive compounds in the leachate. Successful conversion and stabilization of
11330-416: The weighbridge for re-weighing without their load. The weighing process can assemble statistics on the daily incoming waste tonnage, which databases can retain for record keeping. In addition to trucks, some landfills may have equipment to handle railroad containers. The use of "rail-haul" permits landfills to be located at more remote sites, without the problems associated with many truck trips. Typically, in
11440-399: The working face, the compacted waste is covered with soil or alternative materials daily. Alternative waste-cover materials include chipped wood or other "green waste", several sprayed-on foam products, chemically "fixed" bio-solids, and temporary blankets. Blankets can be lifted into place at night and then removed the following day prior to waste placement. The space that is occupied daily by
11550-590: Was administered as part of Reichskommissariat Ostland . Latvian paramilitary and Auxiliary Police units established by the occupation authority participated in the Holocaust and other atrocities. 30,000 Jews were shot in Latvia in the autumn of 1941. Another 30,000 Jews from the Riga ghetto were killed in the Rumbula Forest in November and December 1941, to reduce overpopulation in the ghetto and make room for more Jews being brought in from Germany and
11660-529: Was again elected in 1993. Russia ended its military presence by completing its troop withdrawal in 1994 and shutting down the Skrunda-1 radar station in 1998. The major goals of Latvia in the 1990s, to join NATO and the European Union , were achieved in 2004. The NATO Summit 2006 was held in Riga. Vaira Vīķe-Freiberga was President of Latvia from 1999 until 2007. She was the first female head of state in
11770-484: Was eaten or processed and many fragments of stone tools and household goods makes them invaluable objects of archaeological study. Shells have a high calcium carbonate content, which tends to make the middens alkaline . This slows the normal rate of decay caused by soil acidity, leaving a relatively high proportion of organic material (food remnants, organic tools, clothing, human remains) available for archaeologists to find. Edward Sylvester Morse conducted one of
11880-670: Was incorporated into Russia. The Duchy of Courland and Semigallia , a vassal state of the Polish-Lithuanian Commonwealth , was annexed by Russia in 1795 in the Third Partition of Poland , bringing all of what is now Latvia into the Russian Empire . All three Baltic provinces preserved local laws, German as the local official language and their own parliament, the Landtag . The emancipation of
11990-591: Was not adopted. Instead, citizenship was granted to persons who had been citizens of Latvia on the day of loss of independence in 1940 as well as their descendants. As a consequence, the majority of ethnic non-Latvians did not receive Latvian citizenship since neither they nor their parents had ever been citizens of Latvia, becoming non-citizens or citizens of other former Soviet republics. By 2011, more than half of non-citizens had taken naturalization exams and received Latvian citizenship, but in 2015 there were still 290,660 non-citizens in Latvia, which represented 14.1% of
12100-659: Was the European Capital of Culture , Latvia joined the eurozone and adopted the EU single currency euro as the currency of the country and Latvian Valdis Dombrovskis was named vice-president of the European Commission . In 2015 Latvia held the presidency of Council of the European Union . Big European events have been celebrated in Riga such as the Eurovision Song Contest 2003 and
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