Rainfall-runoff modeling is essential for addressing a wide range of issues in urban drainage system design and operation in both scientific research and engineering practice.Recently,it has become increasingly attrac...Rainfall-runoff modeling is essential for addressing a wide range of issues in urban drainage system design and operation in both scientific research and engineering practice.Recently,it has become increasingly attractive to use the smoothed particle hydrodynamics(SPH)method to model rainfall-runoff because of its inherent features such as mesh-free and automatic adaptiveness for wet-dry interfaces.However,one of its inadequacies is the lack of an infiltration effect within rainfall-runoff modeling.Hence,we propose a new methodology that innovatively integrates the infiltration effect into the shallow water equation(SWE)system with the SPH method(SPH-SWE)to represent a more complete rainfall-runoff process.In the proposed method,the mass-varied SPH-SWE(MVSPH-SWE)method is enhanced by integrating the infiltration model.A naked area treatment(NAT)method is subsequently proposed to improve the modeling efficiency and accuracy.The obtained numerical results are validated using experimental data from the literature.The results demonstrate that the proposed method is accurate and reliable.The achievements and findings of this study are expected to improve and extend the use of existing hydrological process models.展开更多
基金Projects supported by the National Natural Science Foundation of China(Grant Nos.51778452,51978493,52000142).
文摘Rainfall-runoff modeling is essential for addressing a wide range of issues in urban drainage system design and operation in both scientific research and engineering practice.Recently,it has become increasingly attractive to use the smoothed particle hydrodynamics(SPH)method to model rainfall-runoff because of its inherent features such as mesh-free and automatic adaptiveness for wet-dry interfaces.However,one of its inadequacies is the lack of an infiltration effect within rainfall-runoff modeling.Hence,we propose a new methodology that innovatively integrates the infiltration effect into the shallow water equation(SWE)system with the SPH method(SPH-SWE)to represent a more complete rainfall-runoff process.In the proposed method,the mass-varied SPH-SWE(MVSPH-SWE)method is enhanced by integrating the infiltration model.A naked area treatment(NAT)method is subsequently proposed to improve the modeling efficiency and accuracy.The obtained numerical results are validated using experimental data from the literature.The results demonstrate that the proposed method is accurate and reliable.The achievements and findings of this study are expected to improve and extend the use of existing hydrological process models.
