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THE WORLD HYDROLOGICAL CYCLE II
WORLD WATER INVENTORY AND CONTROL
36 other sections not shown
amount annual precipitation aquifer areas arid average boundary channel characteristics cirque clay crops dams decrease deposits depth discharge distribution downstream drainage basin drainage density economic effect engineering equation erosion estimated evaporation evapotranspiration example factors flood floodplain Fraser River gauge Geography geomorphology glacial glacier gradient ground water ground-water Horton overland flow humid hydraulic hydroelectric hydrograph hydrological cycle important increase infiltration irrigation karst lakes land landforms limestone losses lower major mass maximum mean annual meandering measured million natural occurs ocean overland flow pattern periglacial permafrost permeability plant problem rain range recharge regimes regions relation relatively reservoirs river rock runoff scheme seasonal sediment sediment yield semi-arid slope snow snowfall soil moisture storage storm stream surface surface runoff temperature throughflow tion transport tropical U.S. Geological Survey United valley variability variations velocity water resources water supply water-table weathering zone