Whitewater forms in the context of rapids , in particular, when a river 's gradient changes enough to generate so much turbulence that air is trapped within the water. This forms an unstable current that froths , making the water appear opaque and white.
52-405: Kernville may refer to: Kernville, California Kernville (former town), California Kernville, Oregon Kernville, Pennsylvania [REDACTED] Topics referred to by the same term This disambiguation page lists articles about distinct geographical locations with the same name. If an internal link led you here, you may wish to change
104-467: A boatsman with passengers having no direct responsibilities. Catarafts can be of all sizes; many are smaller and more maneuverable than a typical raft. Canoes are often made of fiberglass, kevlar, plastic, or a combination of the three for strength and durability. They may have a spraycover , resembling a kayak, or be "open", resembling the typical canoe. This type of canoe is usually referred to simply as an "open boat". Whitewater canoes are paddled in
156-455: A bucket, and because the only way to get water out of them is by bailing with a bucket. Catarafts are constructed from the same materials as rafts. They can either be paddled or rowed with oars. Typical catarafts are constructed from two inflatable pontoons on either side of the craft that are bridged by a frame. Oar-propelled catarafts have the occupants sitting on seats mounted on the frame. Virtually all oar-powered catarafts are operated by
208-413: A canoe. C1s are similar in construction to whitewater kayaks, but they are paddled in a low, kneeling position. They employ the use of a one-blade paddle, usually a little shorter than used in a more traditional canoe. They have a spraycover, essentially the same type used in kayaking. Like kayaks, C1s can be righted after capsizing with an Eskimo roll. McKenzie River dory (or "drift boat" by some)
260-466: A large tourist industry centered on the white water rapids of the Kern River . While white water rafting and kayaking are the main attractions, one can also enjoy mountain biking , rock climbing , and other outdoor activities. Fly fishing is also popular; in particular, the golden trout is highly sought after for catch and release fishing. Downtown Kernville has an Old West look and contains
312-493: A low kneeling position, with a one-bladed paddle. Open whitewater canoes often have large airbags and in some cases foam, usually 2-lb density ethyl foam, firmly attached to the sides, to displace water in the boat when swamped by big waves and holes and to allow water to be spilled from the boat while still in the river by floating it up on its side using the foam and bags. Like kayaks, whitewater canoes can be righted after capsizing with an Eskimo roll, but this requires more skill in
364-424: A lower rated rapid may give a better "ride" to kayakers or rafters, while a Class V may seem relatively tame. However, it is not so much the "ride," but the inherent danger in the rapid. An exiting rapid may have minimal risk, while a seemingly simply rapid may have terminal hydraulics, undercut rocks, etc.) A rapid's grade is not fixed, since it may vary greatly depending on the water depth and speed of flow. Also,
416-469: A number of restaurants, antique shops and motels. The Kern Valley Museum houses a collection of historical items and displays. The nearby Kern Valley Airport is a popular general aviation destination for pilots, with on-site services including riverside camping and a cafe. The 2010 United States Census reported that Kernville had a population of 1,395. The population density was 110.1 inhabitants per square mile (42.5/km ). The racial makeup of Kernville
468-485: A river is the rate at which it changes elevation along its course. This loss determines the river's slope, and to a large extent its rate of flow (velocity). Shallow gradients produce gentle, slow rivers, while steep gradients are associated with raging torrents. Constrictions can form a rapid when a river's flow is forced into a narrower channel. This pressure causes the water to flow more rapidly and to react to riverbed events (rocks, drops, etc.). A boulder or ledge in
520-612: A steep canyon, the side walls of the canyon can also be undercut. A particularly notorious undercut rock is Dimple Rock, in Dimple Rapid on the Lower Youghiogheny River , a very popular rafting and kayaking river in Pennsylvania. Of about nine people who have died at or near Dimple Rock, including three in 2000, several of the deaths were the result of people becoming entrapped after they were swept under
572-418: A strong sideways or diagonal (also called a "lateral") wave can throw the craft off if the craft hits sideways or at an angle. The safest move for a whitewater boater approaching a lateral is to "square up" or turn the boat such that it hits the wave along the boat's longest axis, reducing the chance of the boat flipping or capsizing. This is often counterintuitive because it requires turning the boat such that it
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#1732780861989624-486: A surfer slipping out the end of the pipeline, where the wave no longer breaks. Low-head dams are insidiously dangerous because their danger cannot be easily recognized by people who have not studied swift water. (Even 'experts' have died in them.) Floating debris (trees, kayaks, etc.) is often trapped in these retroflow 'grinders' for weeks at a time. Waves are formed in a similar manner to hydraulics and are sometimes also considered hydraulics, as well. Waves are noted by
676-438: Is a more traditional "hard sided" boat. The design is characterized by a wide, flat bottom, flared sides, a narrow, flat bow, a pointed stern, and extreme rocker in the bow and stern to allow the boat to spin about its center for ease in maneuvering in rapids. River bugs are small, single-person, inflatable craft where a person's feet stick out of one end. River bugging is done feet first with no paddle. Creature Craft are
728-513: Is a short list of them: Whitewater kayaks differ from sea kayaks and recreational kayaks in that they are better specialized to deal with moving water. They are often shorter and more maneuverable than sea kayaks and are specially designed to deal with water flowing up onto their decks. Most whitewater kayaks are made of plastics now, although some paddlers (especially racers and "squirt boaters") use kayaks made of fiberglass composites. Whitewater kayaks are fairly stable in turbulent water, once
780-450: Is dependent upon both seasonal variation in precipitation and snowmelt and upon release rates of upstream dams. Streambed topography is the primary factor in creating rapids, and is generally consistent over time. Increased flow, as during a flood or high-rainfall season, can make permanent changes to the streambed by displacing rocks and boulders, by deposition of alluvium , or by creating new channels for flowing water. The gradient of
832-678: Is located in the Old Kernville Cemetery, with a registration date of January 31, 1934. White water rapids The term "whitewater" also has a broader meaning, applying to any river or creek that has a significant number of rapids. The term is also used as an adjective describing boating on such rivers, such as whitewater canoeing or whitewater kayaking . Four factors, separately or in combination, can create rapids: gradient, constriction, obstruction, and flow rate. Gradient, constriction, and obstruction are streambed topography factors and are relatively consistent. Flow rate
884-402: Is no longer parallel to the current. In fluid mechanics, waves are classified as laminar, but the whitewater world has also included waves with turbulence ("breaking waves") under the general heading of waves. Pillows are formed when a large flow of water runs into a large obstruction, causing water to "pile up" or "boil" against the face of the obstruction. Pillows normally signal that a rock
936-581: Is not undercut. Pillows are also known as "pressure waves". Eddies are formed, like hydraulics, on the downstream face of an obstruction. Unlike hydraulics, which swirl vertically in the water column, eddies revolve on the horizontal surface of the water. Typically, they are calm spots where the downward movement of water is partially or fully arrested—a place to rest or to make one's way upstream. However, in very powerful water, eddies can have powerful, swirling currents that trap or even can flip boats and from which escape can be very difficult. Located between
988-491: Is the International Scale of River Difficulty , where whitewater (either an individual rapid, or the entire river) is classed in six categories from class I (the easiest and safest) to class VI (the most difficult and most dangerous). The grade reflects both the technical difficulty and the danger associated with a rapid, with grade I referring to flat or slow-moving water with few hazards, and grade VI referring to
1040-608: Is used than on flat water. Running whitewater rivers is a popular recreational sport, but is not without danger. Fast-moving water always has the potential for injury or death by drowning or hitting objects. Fatalities do occur; some 50 people die in whitewater accidents in the United States each year. The dangers can be mitigated (but not eliminated) by training, experience, scouting, the use of safety equipment (such as personal flotation devices , helmets, throw ropes), and using other persons as "spotters". Scouting or examining
1092-508: The 1948 move, is now (partially) at the new Kernville, renamed the River View Lodge. Whiskey Flat Days is the annual celebration of the area's Wild West roots. A parade, historical re-enactments, pioneer-style camps, a carnival, street vendors and rodeo are just part of the festivities put on every President's Day weekend and attended by thousands of visitors. Even with its annual summer influx of tourists, Kernville remains one of
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#17327808619891144-568: The American version of the International Scale of River Difficulty). On any given rapid, a multitude of different features can arise from the interplay between the shape of the riverbed and the velocity of the water in the stream. Strainers are formed when an object blocks the passage of larger objects, but allows the flow of water to continue – like a big food strainer or colander . These objects can be very dangerous, because
1196-423: The age of 18 living in them, 312 (43.2%) were opposite-sex married couples living together, 57 (7.9%) had a female householder with no husband present, 28 (3.9%) had a male householder with no wife present. There were 40 (5.5%) unmarried opposite-sex partnerships , and 5 (0.7%) same-sex married couples or partnerships . 282 households (39.0%) were made up of individuals, and 132 (18.3%) had someone living alone who
1248-576: The eddy and the main current, the eddy line is a swirling seam of green and sometimes white water. Eddy lines vary in size based on the size of the water column, the gradient of the section, and the obstacle creating the eddy. Often containing boils and whirlpools, eddy lines can spin and grab your watercraft in unexpected ways, but if used correctly, they can be a really playful spot. Full slice and half slice boaters are able to perform tricks like stern squirts and cartwheels, but nobody uses eddy lines as well as squirt boaters(link to squirt boating wiki), who use
1300-402: The flow rate. In large rivers with high flow rates next to an obstruction, "eddy walls" can occur. An eddy wall is formed when the height of the river is substantially higher than the level of the water in the eddy behind the obstruction. This can make it difficult for a boater, who has stopped in that particular eddy, to re-enter the river due to a wall of water that can be several feet high at
1352-406: The force of the water will pin an object or body against the strainer and then pile up, pushing it down under water. For a person caught in this position, getting to safety will be difficult or impossible, often leading to a fatal outcome. Strainers are formed by many natural or man-made objects, such as storm grates over tunnels, trees that have fallen into a river ("log jam"), bushes by the side of
1404-407: The hardest rapids, which are very dangerous even for expert paddlers, and are rarely run. Grade-VI rapids are sometimes downgraded to grade-V or V+ if they have been run successfully. Harder rapids (for example a grade-V rapid on a mainly grade-III river) are often portaged , a French term for carrying. A portaged rapid is where the boater lands and carries the boat around the hazard. (In many cases,
1456-443: The large, smooth face on the water rushing down. Sometimes, a particularly large wave also is followed by a "wave train", a long series of waves. These standing waves can be smooth, or particularly the larger ones, can be breaking waves (also called "whitecaps" or "haystacks"). Because of the rough and random pattern of a riverbed, waves are often not perpendicular to the river's current. This makes them challenging for boaters, since
1508-516: The level of development in rafting/kayaking technology plays a role. Rapids that would have meant almost certain death a hundred years ago may now be considered only a Class IV or V rapid, due to the development of certain safety features. Although some rapids may be easier at high flows because features are covered or "washed-out", high water usually makes rapids more difficult and dangerous. At flood stage, even rapids that are usually easy can contain lethal and unpredictable hazards (briefly adapted from
1560-434: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Kernville&oldid=543897921 " Category : Place name disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Kernville, California Kernville is a census-designated place (CDP) in
1612-481: The middle of a river or near the side can obstruct the flow of the river, and can also create a "pillow"; when water flows backwards upstream of the obstruction, or a "pour over" (over the boulder); and "hydraulics" or "holes" where the river flows back on itself—perhaps back under the drop—often with fearful results for those caught in its grasp. (Holes, or hydraulics, are so-called because their foamy, aerated water provides less buoyancy and can feel like an actual hole in
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1664-472: The most dangerous types of holes are formed by low-head dams ( weirs ), and similar types of obstructions. In a low-head dam, the 'hole' has a very wide, uniform structure with no escape point, and the sides of the hydraulic (ends of the dam) are often blocked by a man-made wall, making paddling around, or slipping off, the side of the hydraulic, where the bypass water flow would become normal (laminar), difficult. By (upside-down) analogy, this would be much like
1716-443: The most quaint, conservative relics of early California. Many local families trace their lineage to original 19th century homesteaders. The post office, established at the original site in 1868, was moved to the new site in 1951. The original townsite is now registered as California Historical Landmark #132. Climate type occurs primarily on the periphery of the true deserts in low-latitude semiarid steppe regions. Kernville has
1768-435: The object under the water. In a river, swimming aggressively away from the strainer and into the main channel is recommended. If avoiding the strainer is not possible, one should swim hard towards it and try to get as much of one's body up and over it as possible. Sweepers are trees fallen in or heavily leaning over the river, still rooted on the shore and not fully submerged. Their trunks and branches may form an obstruction in
1820-402: The object. Holes can be particularly dangerous—a boater or watercraft may become stuck under the surface in the recirculating water—or entertaining play-spots, where paddlers use the holes' features to perform various playboating moves. In high-volume water flows, holes can subtly aerate the water, enough to allow craft to fall through the aerated water to the bottom of a deep 'hole'. Some of
1872-705: The paddler is skillful with them; if flipped upside-down, the skilled paddler can easily roll them back upright. This essential skill of whitewater kayaking is called the " Eskimo roll ", or simply "roll". Kayaks are paddled in a low sitting position (legs extended forward), with a two-bladed paddle. See Whitewater kayaking . Rafts are also often used as a whitewater craft; more stable than typical kayaks, they are less maneuverable. Rafts can carry large loads, so they are often used for expeditions. Typical whitewater rafts are inflatable craft, made from high-strength fabric coated with PVC, urethane, neoprene or Hypalon; see rafting . While most rafts are large multipassenger craft,
1924-433: The point at which the eddy meets the river flow. A marked increase or decrease in flow can create a rapid, "wash out" a rapid (decreasing the hazard), or make safe passage through previously navigable rapids more difficult or impossible. Flow rate is measured in volume per unit of time. The stream flow rate may be faster for different parts of a river, such as if there's an undercurrent. The most widely used grading system
1976-602: The population) lived in owner-occupied housing units and 369 people (26.5%) lived in rental housing units. The city is served by the Kern Valley Airport , three miles (4.8 km) south of town. The airport features a fly-in campground on site. An airfield cafe serves both pilots and visitors. The city is also served by Kern Transit , connecting the Kern River Valley with the rest of the county. The California Historical Landmark reads: The marker
2028-440: The river like strainers. Since it is an obstruction from above, it often does not contribute to whitewater features, but may create turbulence. In fast water, sweepers can pose a serious hazard to paddlers. Holes, or " hydraulics ", (also known as "stoppers" or "souse-holes" (see also Pillows ) are formed when water pours over the top of a submerged object, or underwater ledges, causing the surface water to flow back upstream toward
2080-411: The river surface.) If the flow passes next to the obstruction, an eddy may form behind the obstruction; although eddies are typically sheltered areas where boaters can stop to rest, scout, or leave the main current, they may be swirling and whirlpool-like. As with hydraulics (which pull downward rather than to the side and are essentially eddies turned at a 90° angle), the power of eddies increases with
2132-417: The river that are flooded during high water, wire fence, rebar from broken concrete structures in the water, or other debris. Strainers occur naturally most often on the outside curves of rivers where the current undermines the shore, exposing the roots of trees and causing them to fall into the river and form strainers. In an emergency, climbing on top of a strainer may be better so as not to be pinned against
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2184-413: The rock. Another major whitewater feature is a sieve, which is a narrow, empty space through which water flows between two obstructions, usually rocks. Similar to strainers, water is forced through the sieve, resulting in higher velocity flow, which forces water up and creates turbulence. People use many types of whitewater craft to make their way down a rapid, preferably with finesse and control. Here
2236-489: The smallest rafts are single-person whitewater craft, see packraft . Rafts sometimes have inflatable floors, with holes around the edges, that allow water that splashes into the boat to easily flow to the side and out the bottom (these are typically called "self-bailers" because the occupants do not have to "bail" water out with a bucket). Others have simple fabric floors, without anyway for water to escape, these are called "bucket boats", both for their tendency to hold water like
2288-546: The southern Sierra Nevada , in Kern County , California , United States. Kernville is located 42 miles (68 km) northeast of Bakersfield , at an elevation of 2,667 feet (813 m). The population was 1,549 at the 2020 United States census , up from 1,395 at the 2010 census , but below the 2000 census total of 1,736. The Kern River was named after artist and topographer Edward Kern , who accompanied John C. Fremont on his 1845 expedition. They camped at what
2340-412: The swirling water and crossing currents to dance below the surface of the river. Undercut rocks have been worn down underneath the surface by the river, or are loose boulders which cantilever out beyond their resting spots on the riverbed. They can be extremely dangerous features of a rapid because a person can get trapped underneath them under water. This is especially true of rocks that are undercut on
2392-504: The tip of the northeast fork of the man-made lake, along with certain historic buildings. Downtown visibly retains Kernville's gold rush and Old West roots, attracting tourists along with the area's natural scenery and outdoor activities. The town's original location is slightly east of Wofford Heights . Foundations and other remnants can still be seen when the lake is low. The famous Mountain Inn, built mainly to house movie stars and crew before
2444-579: The ultimate whitewater craft, with a roll cage design that protects the occupants if they are to flip in any manner. You can see these creatures drifting down rivers like the Gauley, waiting to be capsized and righted by other enthusiastic river users. Whitewater SUP (Stand Up Paddle Boarding) , similar to traditional flat water stand up paddle boarding, whitewater SUPing involves the use of a stand up paddle board to run whitewater. The boards are typically specially designed for whitewater use, and more safety gear
2496-433: The upstream side. Here, a boater may become pinned against the rock under water. Many whitewater deaths have occurred in this fashion. Undercuts sometimes have pillows, but other times the water just flows smoothly under them, which can indicate that the rock is undercut. Undercuts are most common in rivers where the riverbed cuts through sedimentary rocks such as limestone rather than igneous rock such as granite . In
2548-510: Was 1,257 (90.1%) White , 1 (0.1%) African American , 19 (1.4%) Native American , 7 (0.5%) Asian , 0 (0.0%) Pacific Islander , 33 (2.4%) from other races , and 78 (5.6%) from two or more races. Hispanic or Latino of any race were 82 persons (5.9%). The Census reported that 1,387 people (99.4% of the population) lived in households, 8 (0.6%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized. There were 723 households, out of which 111 (15.4%) had children under
2600-410: Was 55.8 years. For every 100 females, there were 97.3 males. For every 100 females age 18 and over, there were 98.9 males. There were 1,072 housing units at an average density of 84.6 units per square mile (32.7 units/km ), of which 532 (73.6%) were owner-occupied, and 191 (26.4%) were occupied by renters. The homeowner vacancy rate was 5.1%; the rental vacancy rate was 13.5%. 1,018 people (73.0% of
2652-404: Was 65 years of age or older. The average household size was 1.92. There were 397 families (54.9% of all households); the average family size was 2.50. The population was spread out, with 184 people (13.2%) under the age of 18, 74 people (5.3%) aged 18 to 24, 197 people (14.1%) aged 25 to 44, 521 people (37.3%) aged 45 to 64, and 419 people (30.0%) who were 65 years of age or older. The median age
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#17327808619892704-465: Was a fork of two rivers, now the middle of Lake Isabella . An 1858 gold rush led to the formation of a town briefly called Rogersville, then Williamsburg, which was in 1863 renamed Whiskey Flat after a bar opened. In 1864, the town was renamed Kernville . After decades of planning, the Isabella Dam project began in 1948. As a result, Kernville was relocated upstream to its present location at
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