城市绿地土壤入渗模型及参数确定

采用降雨径流法和正交实验L9（34）获得了天津中心城区绿地土壤入渗曲线,选取Kostiakov模型、Kostiakov-Lewis模型、Philip模型、Horton模型、Collis-George模型对土壤入渗过程进行描述,利用粒子群算法确定模型参数,使用剩余平方和对模型进行评价。结果表明,Horton模型较常用的K...

Soil Infiltration Model of Urban Green Space and Parameter Determination

The soil infiltration curve of green space in the center of Tianjin was obtained by the rainfall-runoff method and orthogonal experiment L9（34）,and Kostiakov model,Kostiakov-Lewis model,Philip model,Horton model,and Collis-George model were selected to describe the soil infiltration process.The particle swarm optimization was used to determine the parameters of five models,and they were evaluated by the residual sum of squares.The results indicated that Horton model described the soil infiltration characteristics of green space in the center of Tianjin better than Kostiakov model did,which was widely used in practice,and the fitting effect of Philip model was the worst among the five models.Four field experiments were studied to further validate the accuracy of Horton model,and the determination coefficient between the predicted value and measured value was higher than 0.986.