【摘要】 本文对利用畦灌试验资料推求土壤入渗参数的Maheshwari法和Esfandiari法进行改进,把利用模式搜索技术进行参数计算,改为利用非线性回归法进行多次逼近计算,使计算工作量大大减少。实测资料的验证表明,改进后的方法具有更高的计算精度。在此基础上,本文对Maheshwari法、Esfandiari法及经过改进的算法进行了评价,认为几种算法各有优缺点,使用时应根据试验资料及观测精度选择。更多还原

【Abstract】 The Maheshwari’s method and Esfandiari’s method for determining the infiltration parameters in Kostiakov equation are modified to accelerate the calculation and promote the accuracy. The principle of volume balance is adopted and the pattern-search optimization approach currently used is substituted by nonlinear regression approach to calculate the infiltration parameters. The effectiveness of the proposed method is verified by observation data.更多还原