A modified TOPMODEL introducing the bedrock surface topographic index in Huangbengliu watershed,China  

作　　者：QIU An-ni ZHANG Yan-jun WANG Gen-xu CUI Jun-fang SONG Yuan-xin SUN Xiang-yang CHEN Li 

机构地区：[1]State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China [2]State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China [3]Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China [4]Key laboratory of Hydrometeorological Simulation,Prediction and Warning,Nanjing University of Information Science and Technology,Nanjing210044,China [5]School of Hydrology and Water Resources,Nanjing University of Information Scienceand Technology,Nanjing 210044,China

出　　处：《Journal of Mountain Science》2022年第12期3517-3532,共16页山地科学学报（英文）

基　　金：funded by the Major Program of National Natural Science Foundation of China(No.41790431)。

摘　　要：Subsurface stormflow is a dominant runoff mechanism in steep humid mountainous areas.An insite measurement of subsurface stormflow suggests that the bedrock surface plays an important role in the runoff generation and routing process,which was rarely adopted in hydrological modelling studies.To improve the runoff simulation performance,the bedrock surface topographic index is introduced,and a modified TOPMODEL based on the bedrock surface topographic index is developed to simulate the runoff.The modified TOPMODEL is applied to the Huangbengliu(HBL),a steep watershed in Gongga Mountain,and proved to be more appropriate for the HBL watershed,especially for peak simulation.The Nash-Sutcliffe model efficiency(NSE)is improved from 0.24 to 0.58 in the calibration period and from 0.40 to 0.62 in the verification period.The result of this study can advance the understanding of the mechanism of flash floods and contribute flood control and disaster prevention in the HBL watershed and similar areas.

关 键 词：Subsurface stormflow Flash flood Modified TOPMODEL Bedrock surface topographic index Gongga Mountain 

分 类 号：TV223.1[水利工程—水工结构工程]