Evaluating performance dependency of a geomorphologic instantaneous unit hydrograph-based hydrological model on DEM resolution
作者机构：College of Hydrology and Water ResourcesHohai UniversityNanjing 210098China Yangtze Institute for Conservation and DevelopmentHohai UniversityNanjing 210098China State Key Laboratory of Hydrology-Water Resources and Hydraulic EngineeringHohai UniversityNanjing 210098China China Meteorological Administration-Hohai University Joint Laboratory for Hydrometeorological StudiesHohai UniversityNanjing 210098China School of Civil and Environmental EngineeringGeorgia Institute of TechnologyAtlanta 30332USA Department of Civil and Environmental EngineeringUniversity of New OrleansNew Orleans 70148USA
出 版 物：《Water Science and Engineering》 (水科学与水工程（英文版）)
年 卷 期：2022年第15卷第3期
页 面：179-188页
核心收录：
学科分类：08[工学] 0708[理学-地球物理学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 0804[工学-仪器科学与技术] 0816[工学-测绘科学与技术] 0706[理学-大气科学]
基 金：supported by the National Natural Science Foundation of China(Grants No.51979070 and 52079035) the National Key Research and Development Program of China(Grant No.2018YFC1508103) the Natural Science Foundation of Jiangsu Province(Grant No.BK20180022) the Six Talent Peaks Project in Jiangsu Province(Grant No.NY-004)
主 题：DEM resolution XAJ-GIUH model Flood simulation Model recalibration Small and medium-sized catchments
摘 要：The digital elevation model(DEM)is a type of model that has been widely used in terrain analysis and hydrological *** resolution influences the hydrological and geomorphologic features of delineated catchments and consequently affects hydrological *** study investigated the impacts of DEM resolution on the performance of the XAJ-GIUH hydrological model,a model coupling the widely used Xinanjiang(XAJ)hydrological model with the geomorphologic instantaneous unit hydrograph(GIUH),in flood simulations in small and medium-sized *** test the model performance,the model parameters were calibrated at a fine DEM resolution(30 m)and then directly transferred to the simulation runs using coarser ***,model recalibration was conducted at coarser DEM *** the simulation runs with the model parameters calibrated at the 30-m resolution,the DEM resolution slightly affected the overall shape of the simulated flood hydrographs but presented a greater impact on the simulated peak discharges in the two study *** XAJ-GIUH model consistently underestimated the peak discharges when the DEM resolution became *** qualified ratio of peak simulations decreased by 35%when the DEM resolution changed from 30 m to 600 ***,model recalibration produced comparable model per-formances when DEMs with different resolutions were *** study showed that the impact of DEM resolution on model performance can be mitigated by model recalibration to some extent,if the DEM resolution is not too coarse.
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