Simulation and Scenario Analysis of Flood in Lack-data Hilly Regions
As a typical representative of lack‐data hilly regions ,Wangmo County is selected to simulate its mountain torrents in the square part of the mainstream of Wangmo River .Nash geomorphologic unit hydro‐graph is applied to calculate surface runoff while linear reservoir method is used to calculate underground runoff .The parameters of Nash GIUH is determined by the basin's geomor‐phologic characters .The velocity is determined by a formula proposed by Rodriguez‐Iturbe to avoid dependence on hydrological data . The calculated value is smaller than measured value by 3 .0% whose accuracy is satisfactory .It can be used to simulate and predict the flood in lack‐data hilly regions .Meanwhile ,considering measured precipitation data in Wangmo County ,three scenes are analyzed with different rainfall patterns when total precipitation remains unchanged .The result shows that patternⅠ(initial rainfall peak) and pattern Ⅲ(intermediate rainfall peak) will strengthen the flood .So early warning for strong precipitation with short duration and spe‐cific rainfall pattern is needed .
lack-data hilly regionsmountain torrentNash geomorphologic unit hydrographWangmo Countyscenario analysis
NETL
NSTL
万方数据
维普
