水科学进展2025，Vol.36Issue(3)：493-504,12.DOI:10.14042/j.cnki.32.1309.2025.03.012
考虑坡面沟流的土壤含水量精细化模拟及应用
Elaborate simulation of dynamic soil moisture considering gully flow
摘要
Abstract
The study aimed to simulate soil moisture dynamics incorporating gully slope flow processes.The watershed was first discretized into a series of orthogonal grid cells.Then,a distributed rainfall-runoff model(Grid-XAJ-SS)considering slope gully flow mechanisms was developed.The model also accounted for channel flow movement emphasizing the lateral flow redistribution mechanism between adjacent grid cells along the slopes.The model was validated through multiple flood events(2014-2024)in the Wuqiangxi inter-basin watershed,showing runoff depth errors ranging from-3.2％to 2％and peak flow relative errors between 2％and 5％.The simulated soil moisture distribution exhibited a correlation coefficient of 0.66 with precipitation patterns,whereas spatial variations exhibited a rank correlation coefficient of 0.47 as compared to those exhibited by LPRM AMSR2 satellite data.These results indicate that the Grid-XAJ-SS effectively simulated a high-precision runoff and elaborated the spatiotemporal dynamics of soil moisture.The simulated soil moisture patterns were physically consistent with rainfall distribution characteristics and spatially coherent with satellite-derived moisture observations.关键词
土壤含水量/坡面沟流/分布式降雨径流模型/LPRM AMSR2产品/五强溪区间流域Key words
soil moisture/gully flow/distributed rainfall-runoff model/LPRM AMSR2/Wuqiangxi inter-basin watershed分类
建筑与水利引用本文复制引用
童冰星,陈瑜彬,张潇,许银山,吕坤,马润佳..考虑坡面沟流的土壤含水量精细化模拟及应用[J].水科学进展,2025,36(3):493-504,12.基金项目
国家重点研发计划项目(2023YFC3209103) （2023YFC3209103）
水利部重大科技项目(SKR-2022011) The study is financially supported by the National Key R&D Program of China(No.2023YFC3209103)and the Major Science and Technology Projects of the Ministry of Water Resources,China(No.SKR-2022011). （SKR-2022011）
