Establishment of a slope-scale innovated rainfall-runoff model by combining infiltration equation and motion wave equation for watershed flash flood risk prediction

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology Pub Date : 2025-01-12 DOI:10.1016/j.jhydrol.2025.132700

Libo Wang, Xianglong Dai, Guoqiang Wang, A. Yinglan, Chiyuan Miao, Baolin Xue, Yuntao Wang, Yi Zhu

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引用次数: 0

Abstract

The significant increase in precipitation instability caused by global climate change has increased the probability of flash flood risk and attracted widespread attention. Due to the suddenness and destructiveness of flash flood risks, it is urgent to construct a minute-level rainfall-runoff model. Therefore, this study takes the slope as the basic response unit and combines slope experimental observation data to create a rainfall-runoff model that combines the infiltration equation and motion wave equation. The outbreak of flash flood disasters is simplified into the results of multiple slope rainfall-runoff processes, achieving simulation and prediction of slope runoff after rainfall. The essential findings of the study are as follows: (1) The accuracy of the slope rainfall-runoff model can arrive at 0.72, which can achieve minute-level rainfall-runoff simulation; (2) Through model simulation, the key factors affecting the rainfall-runoff process are as follows: rainfall intensity > soil bulk density > soil water suction > slope; (3) Meanwhile, we found that the focus of flash flood risk prevention and control is whether flash floods will occur and their destructiveness. Therefore, special attention should be paid to three corresponding indicators including runoff response time, runoff speed, and runoff threshold. At the same time, key environmental factors should also be studied to determine their influence. This study has important guiding significance for accurate risk prediction and prevention and control in high flash flood front areas.

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来源期刊

Journal of Hydrology 地学-地球科学综合

CiteScore

11.00

自引率

12.50%

发文量

1309

审稿时长

7.5 months

期刊介绍： The Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology and hydrogeology. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, hydraulics, agrohydrology, geomorphology, soil science, instrumentation and remote sensing, civil and environmental engineering are included. Social science perspectives on hydrological problems such as resource and ecological economics, environmental sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site.