优化技术在土壤入渗参数计算中的应用

Application of the Optimization Method for Computing Infiltration Characteristics

对优化技术在入渗参数计算中的应用进行了研究,选取Kostiakov、修正的Kostiakov、Philip、Horton、Collis-George5个入渗模型,利用甘肃省3个大型灌区的实测资料计算了入渗参数,用剩余平方和对计算精度进行评价,结果表明,Collis-George模型、修正的Kostiakov模型较目前常用的Kostiakov模型能更好地描述这3个灌区的土壤入渗特性。

This paper deals with the optimization method for computing the infiltration parameters of equations Kostiakov、Modified Kostiakov、Philip、Horton、Collis-Georgee. The infiltration parameters of these five models were calculated using the optimization method from data measured in field of three large-scale irrigation areas in Gansu. The accuracy of calculation was evaluated using resdual sum of square. The result of evaluation shows that equations Collis-Georgee, modified Kostiakov fit the infiltration characteristics of soil in these three irrigation area better than that Kostiakov equation do, Which is widely using in practice.