000028509 001__ 28509
000028509 041__ $$aEnglish
000028509 100__ $$aViviroli, D.
000028509 245__ $$aMountains of the World, Water Towers for Humanity: Typology, Mapping, and Global Significance
000028509 260__ $$c2007
000028509 300__ $$aW07447
000028509 511__ $$aKoshi, Article
000028509 520__ $$a Mountains are important sources of freshwater for the adjacent lowlands. In view of increasingly scarce freshwater resources, this contribution should be clarified. While earlier studies focused on selected river systems in different climate zones, we attempt here a first spatially explicit, global typology of the so-called “water towers” at the 0.5° × 0.5° resolution in order to identify critical regions where disproportionality of mountain runoff as compared to lowlands is maximum. Then, an Earth systems perspective is considered with incorporation of lowland climates, distinguishing four different types of water towers. We show that more than 50% of mountain areas have an essential or supportive role for downstream regions. Finally, the potential significance of water resources in mountains is illustrated by including the actual population in the adjacent lowlands and its water needs: 7% of global mountain area provides essential water resources, while another 37% delivers important supportive supply, especially in arid and semiarid regions where vulnerability for seasonal and regional water shortage is high.
000028509 653__ $$aWater Towers
000028509 653__ $$aMountain Hydrology
000028509 653__ $$aWater Resources
000028509 653__ $$aGlobal Assessment
000028509 653__ $$aGlobal Change
000028509 700__ $$aDürr, H. H.
000028509 700__ $$aMesserli, B.
000028509 700__ $$aMeybeck, M.
000028509 700__ $$aWeingartner, R.
000028509 773__ $$pWater Resources Research
000028509 773__ $$v43 (7)
000028509 773__ $$a10.1029/2006WR005653
000028509 8564_ $$uhttp://dx.doi.org/10.1029/2006WR005653$$yExternal link
000028509 980__ $$aARTICLE