【摘要】：通過構(gòu)建雅魯藏布江流域分布式水文模型SWAT,并以1989~1998年為率定期,1999~2005年為驗證期對3個水文站(奴各沙、羊村、奴下)的月徑流進(jìn)行了模擬。從模型參數(shù)組里選取徑流成分模擬不同的2組參數(shù),以Nash-Sutcliffe效率系數(shù)(NS)、相關(guān)系數(shù)(R~2)及相對誤差(PBIAS)為評價指標(biāo),來分析模型的模擬結(jié)果好壞。結(jié)果表明:率定期內(nèi),在徑流成分1下奴各沙、羊村站和奴下站的R~2值高達(dá)0.9以上,NS系數(shù)分別為0.9、0.92和0.72,PBIAS的值為7.1%、18.5%及34.2%,但徑流成分與實際情況出入較大。而徑流成分2下,模擬得到的評價指標(biāo)雖然不是很高,但徑流成分比較合理。驗證期總體結(jié)論一致。因此,建議在模型率定驗證中要充分考慮徑流成分的作用,從而提高模型模擬的精度。
[Abstract]:By constructing the distributed hydrological model SWAT, of Yarlung Zangbo River Basin, the monthly runoff of three hydrologic stations (Nugesha, Yangcun, Nuxia) was simulated with the rate from 1989 to 1998 and the verification period from 1999 to 2005. Two groups of parameters with different runoff components were selected from the model parameter group, and the Nash-Sutcliffe efficiency coefficient (NS), correlation coefficient (R 鈮，

本文編號：2523828