Dranse (Haute-Savoie)
The Dranse (french: la Dranse) is a French river in the department of Haute-Savoie, that empties into Lake Geneva between Thonon-les-Bains and Évian-les-Bains. The name "Dranse (other), Dranse" comes from the former ''Drantia'', based on the hydronym ''dur-, dora'' and the suffix ''-antia''. Geography The Dranse is formed from the combination of three mountain rivers originating from the peaks of the upper Chablais Alps, which converge upstream from the River delta, delta: * To the east, the Dranse d'Abondance irrigates the Val d'Abondance and passes through the communes of Abondance, Haute-Savoie, Abondance and Châtel, Haute-Savoie, Châtel; * To the south, the Dranse de Morzine passes through Morzine, Saint-Jean-d'Aulps and the Gorges du Pont-du-Diable; * To the west, the Brevon, also called the Dranse de Bellevaux, originates from Roc d'Enfer and passes through Lac de Vallon and the villages of Bellevaux, Vailly, Haute-Savoie, Vailly and Reyvroz. The Dranse d'Abo ...
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Lake Geneva
, image = Lake Geneva by Sentinel-2.jpg , caption = Satellite image , image_bathymetry = , caption_bathymetry = , location = Switzerland, France , coords = , lake_type = Glacial lake , inflow = Rhône, Dranse , outflow = Rhône , catchment = , basin_countries = Switzerland, France , length = , width = , area = , depth = , max-depth = , volume = , residence_time = 11.4 years , shore = , elevation = , islands = Île de Peilz, Château de Chillon, Île de Salagnon, Île de la Harpe, Île Rousseau, Île de Choisi , cities = Geneva (CH), Lausanne (CH), Évian (F), Montreux (CH), Thonon (F), Vevey (CH) (''see list'') , pushpin_map=France Rhône-Alpes#Canton of Vaud#Canton of Valais#Switzerland#France#Alps , pushpin_label_position= bottom , e ...
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Saint-Jean-d'Aulps
Saint-Jean-d'Aulps (; frp, San Zhan) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. Situated in the heart of the Vallée d'Aulps, as well as being the home to an active farming community, it is popular with holiday-makers in the Summer, for walking, and in the Winter for skiing as it is a part of the massive Portes du Soleil ski area. The inhabitants are called (in French) the "Jovanétiens". The commune is spread over and has 1,558 inhabitants (2019), 6,900 beds for tourists, 464 main residences, and 1,358 secondary residences. The population density is 39 inhabitants/km2 (2019). Saint-Jean-d'Aulps is surrounded by the communes of Seytroux, Le Biot, Abondance, Essert Romand and Bellevaux. The closest town is Thonon les Bains away. The river "la Dranse de Morzine" is the main water course through the village. In the commune, at an altitude of , is the ski-area "l'Espace Roc d'Enfer". One can ski between above sea l ...
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Whitewater Kayaking
Whitewater kayaking is an adventure sport where a river is navigated in a decked kayak. Whitewater kayaking includes several styles. River running; where the paddler follows a river and paddles rapids as they travel. Creeking usually involving smaller, steeper, and more technical waterways. Creek boats tend to be short but high volume to allow for manoeuvrability while maintaining buoyancy. Slalom requires paddlers to navigate through "gates" (coloured poles hanging above the river). Slalom is the only whitewater event to be in the Olympics. Play boating involves staying on one feature of the river and is more artistic than the others. Squirt boating uses low-volume boats (usually made specifically for the paddler) to perform special moves in whitewater features. History Paddling on rivers, lakes and oceans is as old as the Stone Age. The raft, the catamaran, the canoe and the kayak evolved depending on the needs and environment of the indigenous peoples in different parts of ...
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Biodiversity
Biodiversity or biological diversity is the variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic (''genetic variability''), species (''species diversity''), and ecosystem (''ecosystem diversity'') level. Biodiversity is not distributed evenly on Earth; it is usually greater in the tropics as a result of the warm climate and high primary productivity in the region near the equator. Tropical forest ecosystems cover less than 10% of earth's surface and contain about 90% of the world's species. Marine biodiversity is usually higher along coasts in the Western Pacific, where sea surface temperature is highest, and in the mid-latitudinal band in all oceans. There are latitudinal gradients in species diversity. Biodiversity generally tends to cluster in hotspots, and has been increasing through time, but will be likely to slow in the future as a primary result of deforestation. It encompasses the evolutionary, ecological, and cultural ...
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Delta De La Dranse National Nature Reserve
The Delta de la Dranse National Nature Reserve is a nature reserve located in the delta of the Dranse river. The reserve is located to the east of the commune of Thonon-les-Bains in southeastern France. At long by wide, it covers a small area of at an elevation ranging from . Offering a rich botanic biodiversity, the site was declared a national nature reserve in January 1980 Décret ministériel n° 80–97 du 17 janvier 1980 portant création de la réserve naturelle du delta de la Dranse and declared a special "zone of protection" since September 1986. The beach of the last river delta along Lake Geneva is constituted of alluvium, sand, stones, and pebbles. The sandy beaches and small islands are constantly being formed by the path of the rising torrential river, which has resulted in the expansion of a rich diversity of flora and wildlife. The reserve shelters: * Close to 750 plant species including orchids; * More than 200 species of birds, notably the red-crested po ...
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Tributary
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean. The Irtysh is a chief tributary of the Ob river and is also the longest tributary river in the world with a length of . The Madeira River is the largest tributary river by volume in the world with an average discharge of . A confluence, where two or more bodies of water meet, usually refers to the joining of tributaries. The opposite to a tributary is a distributary, a river or stream that branches off from and flows away from the main stream."opposite to a tributary"
PhysicalGeography.net, Michael Pidwirny & S ...
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Strahler Stream Order
In mathematics, the Strahler number or Horton–Strahler number of a mathematical tree (graph theory), tree is a numerical measure of its branching complexity. These numbers were first developed in hydrology by and ; in this application, they are referred to as the Strahler stream order and are used to define stream size based on a hierarchy of tributary, tributaries. They also arise in the analysis of L-systems and of hierarchical biological structures such as (biological) trees and animal respiratory and circulatory systems, in register allocation for compiler, compilation of high-level programming languages and in the analysis of social networks. Alternative stream order, stream ordering systems have been developed by Shreve and Hodgkinson et al.Hodgkinson, J.H., McLoughlin, S. & Cox, M.E. 2006. The influence of structural grain on drainage in a metamorphic sub-catchment: Laceys Creek, southeast Queensland, Australia. Geomorphology, 81: 394–407. A statistical comparison of St ...
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Reyvroz
Reyvroz (; frp, Révro) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. See also *Communes of the Haute-Savoie department The following is a list of the 279 Communes of France, communes of the French Departments of France, department of Haute-Savoie. The communes cooperate in the following Communes of France#Intercommunality, intercommunalities (as of 2020):

Vailly, Haute-Savoie
Vailly (; frp, Vâlyi) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. See also *Communes of the Haute-Savoie department The following is a list of the 279 Communes of France, communes of the French Departments of France, department of Haute-Savoie. The communes cooperate in the following Communes of France#Intercommunality, intercommunalities (as of 2020):

Bellevaux
Bellevaux (; frp, Balavô) is a commune in the Haute-Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. See also *Communes of the Haute-Savoie department The following is a list of the 279 Communes of France, communes of the French Departments of France, department of Haute-Savoie. The communes cooperate in the following Communes of France#Intercommunality, intercommunalities (as of 2020):

Lac De Vallon
Lac de Vallon is a lake at Bellevaux in the Haute-Savoie department of France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac .... The lake formed in 1943 when a landslide blocked the course of the Brévon river. Vallon, Lac {{HauteSavoie-geo-stub ...
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