HEJuan,LIANGXiao-guang,WENWei-hua,et al.Algorithm Improvement of SWMM Infiltration Model[J].China Water & Wastewater,2022,38(7):122-125.
Algorithm Improvement of SWMM Infiltration Model
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第7期
Page:
122-125
Column:
Date of publication:
2022-04-01
- Keywords:
- SWMM; infiltration model; algorithm improvement
- Abstract:
- Infiltration model of SWMM cannot handle the situation that the soil is not completely dry at the beginning of the simulation. The initial state of soil was considered in the calculation process of the model by introducing initial infiltration rate parameter in Horton model, initial moisture deficit parameter in Green-Ampt model, and initial curve number parameter in curve number model. According to different types of infiltration model in SWMM, this paper introduced the methods for calculation of intermediate state parameters, such as initial cumulative infiltration volume, initial infiltration time and initial cumulative rainfall volume. A single rainfall event was taken as an example to illustrate the feasibility of the improving algorithm. The results showed that the infiltration capacity of soil was obviously reduced when the soil was in initial incompletely dry state.
Last Update:
2022-04-01