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24-517: Lužnice may refer to places: Lužnice (river) , Czech Republic and Austria Lužnice, Kragujevac , a settlement in Serbia Lužnice (Jindřichův Hradec District) , a municipality and village, Czech Republic Lužnice, a hamlet and part of Pohorská Ves , Czech Republic [REDACTED] Topics referred to by the same term This disambiguation page lists articles about distinct geographical locations with

48-402: A new, straighter river channel develops—and an abandoned meander loop, called a cutoff , forms. When deposition finally seals off the cutoff from the river channel, an oxbow lake forms. This process can occur over a time from a few years to several decades, and may sometimes become essentially static. Gathering of erosion products near the concave bank and transporting them to the convex bank

72-555: A river channel is straightened artificially to improve navigation or for flood alleviation. This occurred notably on the upper Rhine in Germany in the nineteenth century. An example of an entirely artificial waterway with oxbows is the Oxford Canal in England. When originally constructed, it had a very meandering course, following the contours of the land, but the northern part of the canal

96-413: A spoon. The dense particles quickly sweep into a neat pile in the center of the bowl. This is the mechanism that leads to the formation of point bars and contributes to the formation of oxbow lakes. The primary flow of water in the bowl is circular and the streamlines are concentric with the side of the bowl. However, the secondary flow of the boundary layer across the floor of the bowl is inward toward

120-584: Is 197.9 km (123.0 mi) long, of which 157.7 km (98.0 mi) is in the Czech Republic. About 2.2 km (1.4 mi) of the river forms the Austrian-Czech border. Its drainage basin has an area of 4,234.7 km (1,635.0 sq mi), of which 3,256.4 km (1,257.3 sq mi) is in the Czech Republic. The longest tributaries of the Lužnice are: The most notable settlement on

144-495: Is because rivers with high sinuosity have larger meanders, and greater opportunity for longer lakes to form. Rivers with lower sinuosity are characterized by fewer cutoffs and shorter oxbow lakes due to the shorter distance of their meanders. Oxbow lakes serve as important wetland ecosystems. In the United States, oxbow lakes serve as the primary habitat for water tupelo and the iconic bald cypress . The numerous oxbow lakes of

168-515: Is important mainly for the integrity of the hydrological regime and for many rare, endangered or otherwise important wetland species. The riverbed in the section between Veselí nad Lužnicí (where Třeboňsko PLA ends) to the mouth of the river is protected as Lužnice Nature Monument with an area of 432.2 ha (1,068 acres). The reason for protection is the occurrence of rare and endangered species, especially thick shelled river mussel , weatherfish and Eurasian otter . The most common fish in

192-437: Is the work of the secondary flow across the floor of the river in the vicinity of a river bend. The process of deposition of silt, sand and gravel on the convex bank is clearly illustrated in point bars . The effect of the secondary flow can be demonstrated using a circular bowl. Partly fill the bowl with water and sprinkle dense particles such as sand or rice into the bowl. Set the water into circular motion with one hand or

216-532: The Amazon River are a favorable habitat for the giant river otter . Oxbow lakes may also be suitable locations for aquaculture . Oxbow lakes contribute to the health of a river ecosystem by trapping sediments and agricultural runoff, thereby removing them from the main river flow. However, this is destructive of the oxbow lake ecosystem itself. Oxbow lakes are also vulnerable to heavy metal contamination from industrial sources. Oxbow lakes may be formed when

240-554: The Rio Grande are called resacas . In Australia , oxbow lakes are called billabongs . An oxbow lake forms when a meandering river erodes through the neck of one of its meanders . This takes place because meanders tend to grow and become more curved over time. The river then follows a shorter course that bypasses the meander. The entrances to the abandoned meander eventually silt up, forming an oxbow lake. Because oxbow lakes are stillwater lakes, with no current flowing through them,

264-473: The Czech Republic and flows past the towns of Suchdol nad Lužnicí , Třeboň , Veselí nad Lužnicí , Soběslav , Planá nad Lužnicí , Sezimovo Ústí , Tábor (where the river turns back to the southwest), Bechyně and Týn nad Vltavou . The Lužnice flows through the Třeboň Basin , which is known for its fishponds . There are 6,408 bodies of water in the basin area. The largest of them is the largest fishpond in

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288-563: The axis of the Třeboňsko Protected Landscape Area. Within this area, the nature reserve of Horní Lužnice is delimited in the immediate vicinity of a 16-km long stretch of the river. It has an area of 395.1 ha (976 acres). The subject of protection is the river and its floodplain with various types of wetland and meadow species. It is one of the last extensive locations in Central Europe of this type. The territory

312-404: The bend than on the inside. A pressure gradient toward the convex bank provides the centripetal force necessary for each parcel of water to follow its curved path. The boundary layer that flows along the river floor does not move fast enough to balance the pressure gradient laterally across the river. It responds to this pressure gradient, and its velocity is partly downstream and partly across

336-412: The center. The primary flow might be expected to fling the dense particles to the perimeter of the bowl, but instead the secondary flow sweeps the particles toward the center. The curved path of a river around a bend makes the water's surface slightly higher on the outside of the bend than on the inside. As a result, at any elevation within the river, water pressure is slightly greater near the outside of

360-440: The country. It it suitable for beginner paddlers. Both the upper course and the lower course are navigable. Oxbow lake An oxbow lake is a U-shaped lake or pool that forms when a wide meander of a river is cut off , creating a free-standing body of water. The word "oxbow" can also refer to a U-shaped bend in a river or stream, whether or not it is cut off from the main stream. In South Texas , oxbows left by

384-430: The entire lake gradually silts up, becoming a bog or swamp and then evaporating completely. When a river reaches a low-lying plain, often in its final course to the sea or a lake , it meanders widely. In the vicinity of a river bend, deposition occurs on the convex bank (the bank with the smaller radius). In contrast, both lateral erosion and undercutting occur on the cut bank or concave bank (the bank with

408-404: The greater radius). Continuous deposition on the convex bank and erosion of the concave bank of a meandering river cause the formation of a very pronounced meander with two concave banks getting closer. The narrow neck of land between the two neighboring concave banks is finally cut through, either by lateral erosion of the two concave banks or by the strong currents of a flood . When this happens

432-400: The river is common chub . Other numerous fish include common roach , common bleak , gudgeon and in fast-flowing sections common barbel . Rare is the occurrence of burbot . The Lužnice is spanned by the rare Stádlec Suspension Bridge , which connects Stádlec with the village of Dobřejice (a part of Malšice ). The bridge is protected as a national cultural monument . At Bechyně ,

456-590: The river is derived from the Czech word luh (i.e. ' riparian forest '), meaning "the river that flows through riparian forests". The first written mention of the river is from 1179. The Lužnice originates in the territory of Bad Großpertholz in the Gratzen Mountains at an elevation of 970 m (3,180 ft) and flows to Hosty , where it enters the Vltava River at an elevation of 352 m (1,155 ft). It

480-470: The river is spanned by the Bechyně Bridge , a unique reinforced concrete arch bridge. For its value, it is also protected as a national cultural monument. At the village of Stará Hlína (part of Třeboň ), the river is spanned by a stone inundation bridge. It is a valuable twelve-arch bridge from 1799, protected as a cultural monument. The Lužnice is among the most popular rivers for river tourism in

504-429: The river is the town of Tábor . The river originates in the territory of Bad Großpertholz (Austria), then it crosses the Austrian-Czech border and flows through Pohorská Ves , then it returns to Austria and flows through Sankt Martin , Weitra and Unserfrau-Altweitra before it creates the Austrian-Czech border between the territories of Gmünd and České Velenice . After that, the river definitely turns north into

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528-441: The river toward the convex bank. As it flows along the floor of the river, it sweeps loose material toward the convex bank. This flow of the boundary layer is significantly different from the speed and direction of the primary flow of the river, and is part of the river's secondary flow . River flood plains that contain rivers with a highly sinuous platform are populated by longer oxbow lakes than those with low sinuosity . This

552-470: The same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Lužnice&oldid=1173116043 " Category : Place name disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Lu%C5%BEnice (river) The name of

576-468: The world, Rožmberk Pond with an area of 489 ha (1,210 acres), which is located directly on the Lužnice. A small water reservoir, Kořensko, is built in the area of the confluence of the Lužnice and Vltava. In the area of the Třeboň Basin, the river meanders significantly and beside the fishponds, the area around the river in this area is rich in small oxbow lakes . A long section of the river forms

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