New paper by Camille Ouellet Dallaire and听Bernhard Lehner听(看片视频 Department of Geography), Roger Sayre (US Geological Survey, Reston, VA) and听Michele Thieme (World Wildlife Fund, Washington, DC)
Source: 听Published January 25, 2019
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Researchers have produced the first map that catalogs and classifies听all rivers in the world. In published in Environmental Research Letters, scientists from 看片视频 University, the U.S. Geological Survey and the World Wildlife Fund assess听more than 35 million kilometers of rivers world-wide, based on several variables. The resulting听classification produces听127 types of rivers with听different environmental characteristics, ranging from high mountain streams to large lowland rivers, from cold Arctic to warm tropical ones, or even those,听in hot arid regions, that听may be dry most of the year but flow occasionally. "Having a map like this will support a broad range of applications, such as听testing which types of rivers are currently not well protected, which types are most at risk of being environmentally degraded, or听how to best devise international conservation and management strategies to keep them healthy,鈥� says lead author Camille Ouellet Dallaire, a PhD student in 看片视频's Department of Geography.
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