水科学进展2026，Vol.37Issue(2)：298-309,12.DOI:10.14042/j.cnki.32.1309.2026.02.009
基于REW模型的半湿润半干旱地区水文模拟与产流机制分析
Hydrological simulation and runoff generation mechanisms in semi-humid and semi-arid basins using the REW model
摘要
Abstract
Accurate prediction of floods in semi-humid and semi-arid basins relies on a precise representation of runoff generation mechanisms.This study applies the physically based Representative Elementary Watershed(REW)model to simulate flood processes in the Yangquan(semi-humid)and Chabagou(semi-arid)basins.By analyzing the dynamics of saturation-excess and infiltration-excess runoff components directly derived from the model,we quantitatively identify the runoff generation patterns and their dominant controlling factors.Results show:① The Yangquan Basin achieves higher simulation accuracy(ENS=0.73 for both calibration and validation periods),with runoff generation varying between mixed saturation-infiltration mechanisms and infiltration-dominated single mechanisms.② The Chabagou Basin exhibits lower accuracy(ENS=0.68 and 0.51),where runoff is consistently dominated by infiltration-dominated single mechanisms controlled by rainfall intensity.③ The runoff mechanism is more diverse and dynamically modulated by both soil moisture and rainfall in semi-humid regions,whereas it is singular and intensity-driven in semi-arid regions.The REW model effectively captures these processes,supporting improved flood forecasting across different hydroclimatic settings.关键词
代表性单元流域(REW)模型/水文模拟/产流机制/径流组成/半湿润流域/半干旱流域Key words
REW model/hydrological modeling/runoff generation mechanisms/runoff components/semi-humid basin/semi-arid basin分类
建筑与水利引用本文复制引用
许钦,袁肖琦,林晓清,金晨,陈星,蔡晶,周宏..基于REW模型的半湿润半干旱地区水文模拟与产流机制分析[J].水科学进展,2026,37(2):298-309,12.基金项目
国家自然科学基金项目(U2443202 （）
52209031) The study is financially supported by the National Natural Science Foundation of China(No.U2443202 （）
No.52209031). （）
