Simulation of rainfall-runoff and watershed convergence process in the upper reaches of Heihe River Basin,July 2002  

作　　者：GAO Yanhong L(U) Shihua CHENG Guodong 

机构地区：[1]Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

出　　处：《Science China Earth Sciences》2004年第z1期1-8,共8页中国科学（地球科学英文版）

基　　金：co-supported by Orientation Project of Knowledge Innovation Program,Chinese Academy of Sciences(Grand No.KZCX3-SW-329 KZCX1-09);Key Program Project of National Natural Science Foundation of China(Grant Nos.40233035,40075022).

摘　　要：The watershed flow concentration scheme in the distributed hydrology-soil- vegetation model (DHSVM) is coupled with the mesoscale atmospheric model MM5 version 3.5, in which the Oregen States University land surface model (OSULSM) was involved. The flood event which happened in July 2002 in the upper reaches of Heihe river basin is simulated and the surface flow convergence process is shown with this coupled model. It has been concluded that times water head reaches each place of the basin are different. Water amount at each point is split-flow proportionally as the drops in elevation between it and neighbor points. Large part of the water amount pass away in greater slope direction and small part pass away in smaller slope one.Adding of the slope convergence makes the atmospheric model redistributes the surface water laterally.The watershed flow concentration scheme in the distributed hydrology-soil- vegetation model (DHSVM) is coupled with the mesoscale atmospheric model MM5 version 3.5, in which the Oregen States University land surface model (OSULSM) was involved. The flood event which happened in July 2002 in the upper reaches of Heihe river basin is simulated and the surface flow convergence process is shown with this coupled model. It has been concluded that times water head reaches each place of the basin are different. Water amount at each point is split-flow proportionally as the drops in elevation between it and neighbor points. Large part of the water amount pass away in greater slope direction and small part pass away in smaller slope one. Adding of the slope convergence makes the atmospheric model redistributes the surface water laterally.

关 键 词：distributed hydrology-soil-vegetation model  MESOSCALE atmospheric model  WATERSHED flow concentration process. 

分 类 号：N[自然科学总论]