Flood routing model incorporating intensive streambed infiltration

• Published in: Science China. Earth sciences Vol. 58; no. 5; pp. 718 - 726
• Main Authors: Cheng, Liang, Wang, ZongZhi, Hu, SiYi, Wang, YinTang, Jin, JuLiang, Zhou, YuLiang
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.05.2015; Springer Nature B.V
• Subjects: Computer simulation; Downstream; Earth and Environmental Science; Earth Sciences; Flood forecasting; Flood routing; Flood waves; Floods; Forecasting; Groundwater; Hydrometric stations; Infiltration; Infiltration capacity; Infiltration rate; Mathematical models; Rainfall-runoff relationships; Research Paper; River basins; Rivers; Semiarid lands; Soil infiltration; Streambeds; Streams; 土壤入渗; 密集; 模拟方法; 汇流计算; 河床; 洪水演进; 渗透能力; 降雨径流模型; flood routing; flood simulation; Haihe River Basin; streambed infiltration; Muskingum-Cunge method; flood forecasting
• ISSN: 1674-7313; 1869-1897
• DOI: 10.1007/s11430-014-5018-x

Flood routing models are critical to flood forecasting and confluence calculations. In the streams that dry up and disconnect from groundwater, the streambed infiltration is intensive and has a significant effect on flood wave movement. Streambed in- filtration should be considered in flood routing. A flood routing model incorporating intensive streambed infiltration is pro- posed. In the model a streambed infiltration simulation method based on soil infiltration theory is developed. In this method the Horton equation is used to calculate infiltration capacity. A trial-and-error method is developed to calculate infiltration rate and determine whether the flood wave can travel downstream. A formula is derived to calculate infiltration flow per unit length. The Muskingum-Cunge method with streambed infiltration flow as lateral outflow is used for flood routing. The pro- posed model is applied to the stream from the downstream of the Yuecheng Reservoir to the Caixiaozhuang Hydrometric Sta- tion in the Zhangwei River of the Haihe River Basin. Simulation results show that the accuracy of the model is high, and the infiltration simulation method can represent infiltration processes well. The proposed model is simple and practical for flood simulation and forecasting, and can be used in river confluence calculations in a rainfall-runoff model for arid and semiarid re- gions.