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18-422: In a narrower sense and officially, Lake Kasumigaura refers to a waterbody with an area of 167.63 km. In a wider sense, Lake Kasumigaura can also refer to a group of contiguous lakes , which includes Lake Kasumigaura proper, hereby referred to as Nishiura (西浦), and two smaller lakes, Kitaura (北浦; 35.16 km) and Sotonasakaura (外浪逆浦; 5.85 km), and also encompasses the rivers connecting them. In this case

36-428: A ban on the use and sale of phosphate-containing synthetic detergents , and the control of nitrogen and phosphorus contents in the effluent from factories. In order to help maintain the lake, dredging work is being carried out around the lake and at the estuaries of main inflowing rivers, such as Sakura River (桜川). Body of water A body of water or waterbody is any significant accumulation of water on

54-458: A black rear end, a dark green speculum and a brilliant white patch on upper wings, obvious in flight or at rest. It has a pink breast, white belly, and a chestnut head with a creamy crown . In non-breeding (eclipse) plumage, the drake looks more like the female. The female is light brown, with plumage much like a female American wigeon . It can be distinguished from most other ducks, apart from American wigeon, on shape. However, that species has

72-557: A paler head and white axillaries on its underwing. The female can be a rufous morph with a redder head, and a gray morph with a more gray head. It breeds in the northernmost areas of Europe and the Palearctic . It is the Old World counterpart of North America's American wigeon . It is strongly migratory and winters further south than its breeding range. It migrates to southern Asia and Africa. In Great Britain and Ireland ,

90-519: A result, the salinity of Lake Kasumigaura declined, and today the lake contains fresh water. This lake was famous for its traditional fishery during the Edo period . But today, fishing production has drastically decreased due to water quality deterioration that was partially caused by the closure of the tide gate in 1963 for purposes of desalination. Today, Lake Kasumigaura is used for fishing , irrigation , tourism , recreation , and for consumption by

108-615: Is the result of a four-year cultivation period. However, in 2006, cultivation was discontinued as cheap freshwater pearls from China proved too difficult to compete against. The water from Lake Kasumigaura has long been used for the irrigation of paddy fields in the surrounding alluvial plain and upland fields on diluvial terraces covered by thick deposits of volcanic ash . The primary crops are rice and lotus root (a local speciality). Other crops include tomato , cucumber , eggplant , watermelon , corn , edamame , sweet potato , kabocha , daikon and peanut . Many tourists come to

126-419: Is what creates the tidal effects. Moreso, the impact of climate change on water is likely to intensify as observed through the rising sea levels , water acidification and flooding . This means that climate change has pressure on water bodies. Climate change significantly affects bodies of water through rising temperatures, altered precipitation patterns, and sea-level rise. Warmer temperatures lead to

144-454: The Eurasian coot are a few of the birds seen around the lake. Lake Kasumigaura provides over 60 tons of water per second; most goes to agriculture (83%). The rest is provided to local industry (13%) and public (4%) in the prefectures of Ibaraki , Chiba and Tokyo . Eutrophication is a serious problem for Lake Kasumigaura. Legislation was enacted in 1982 to help prevent it, including

162-450: The widgeon or the wigeon , is one of three species of wigeon in the dabbling duck genus Mareca . It is common and widespread within its Palearctic range. The Eurasian wigeon was described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae under the binomial name Anas penelope . Anas is the Latin word for "duck", and penelope refers to a duck that

180-819: The Eurasian wigeon is common as a winter visitor, but scarce as a breeding bird in Scotland , the Lake District , the Pennines and occasionally further south, with only a handful of breeding pairs in Ireland . It can be found as an uncommon winter visitor in the United States on the mid-Atlantic and Pacific coasts. It is a rare visitor to the rest of the United States except for the Four Corners and

198-598: The lake in the summer to view the Hobikibune (帆引き船) sailed fishing boats which are unique to Lake Kasumigaura. The Suigo aquapark , located in Tsuchiura , is popular during the hottest months. The windmill of Kasumigaura comprehensive park is a popular site along the shores throughout the year and especially in the spring when the tulips are flowering. The lake is a recreation hotspot. Sport fishing enthusiasts and anglers can be found close to shore and around

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216-791: The melting of glaciers and polar ice, contributing to rising sea levels and affecting coastal ecosystems. Freshwater bodies, such as rivers and lakes, are experiencing more frequent droughts, affecting water availability for communities and biodiversity. Moreover, ocean acidification , caused by increased carbon dioxide absorption, threatens marine ecosystems like coral reefs. Collaborative global efforts are needed to mitigate these impacts through sustainable water management practices. Bodies of water can be categorized into: There are some geographical features involving water that are not bodies of water, for example, waterfalls , geysers and rapids . European wigeon The Eurasian wigeon or European wigeon ( Mareca penelope ), also known as

234-553: The river mouths surrounding the lake. Recreational boats , such as yachts , power boats , sail boats and personal watercraft , are regularly enjoyed on warm weekends. The wide surrounding wetlands are wonderful for birdwatching , as large numbers of water fowl can be observed, primarily during the wintering period. Japanese cormorant , Bewick’s swan , little egret , grey heron , mallard , Eurasian wigeon , striated heron , sharp-tailed sandpiper , bush warbler , wood sandpiper , marsh grassbird , Japanese reed bunting , and

252-472: The southern Appalachians . The Eurasian wigeon is a bird of open wetlands, such as wet grassland or marshes with some taller vegetation, and usually feeds by dabbling for plant food or grazing, which it does very readily. It nests on the ground, near water and under cover. It is highly gregarious outside of the breeding season and will form large flocks. They will join with flocks of the American wigeon in

270-991: The surface of Earth or another planet. The term most often refers to oceans , seas , and lakes , but it includes smaller pools of water such as ponds , wetlands , or more rarely, puddles . A body of water does not have to be still or contained; rivers , streams , canals , and other geographical features where water moves from one place to another are also considered bodies of water. Most are naturally occurring geographical features , but some are artificial. There are types that can be either. For example, most reservoirs are created by engineering dams , but some natural lakes are used as reservoirs . Similarly, most harbors are naturally occurring bays , but some harbors have been created through construction. Bodies of water that are navigable are known as waterways . Some bodies of water collect and move water, such as rivers and streams, and others primarily hold water, such as lakes and oceans. Bodies of water are affected by gravity, which

288-435: The surrounding public and local industry. A variety of fish can be caught from the waters of Lake Kasumigaura, including smelt , Japanese icefish , crucian carp , goby , Japanese eel and river prawn . The most popular catch is cultivated carp, followed by smelt and goby. Another cultivated treasure from Lake Kasumigaura is the beautiful Kasumi freshwater pearls . They were known for their high luster and rosy hues, which

306-529: The total area is 220 km. About 45% of the land surrounding the lake is natural landscape and 43.5% is agricultural land. Lake Kasumigaura originally was a brackish-water lagoon , with indirect connections to the Pacific Ocean via the Hitachigawa and Tone Rivers. In 1963, the construction of a gate near the confluence of these rivers disconnected the lake from its sources of ocean water. As

324-455: Was supposed to have rescued Penelope when she was thrown into the sea. Her name derives from Ancient Greek πήνη pene , "braid" and ὤψ ops "appearance", from the ruse she used to deter suitors while her husband Ulysses was absent. This dabbling duck is 42–52 cm (17–20 in) long with a 71–80 cm (28–31 in) wingspan, and a weight of 500–1,073 g (1.102–2.366 lb). The breeding male has grey flanks and back, with

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