Research on Inversion of Soil Water Dynamic Parameters by Field Soil Moisture Content
The field soil moisture data under different vegetation and irrigation condition were accumulated by many irrigation experiments. The soil water dynamic parameters were acquired or improved by the parameters inversion method and making good use of these data. It was significance in monitoring and forecasting soil moisture and field water cycle. In this paper, according to the measured soil moisture of winter wheat from regreening to harvest in 2009 on Tianjin agricultural university agricultural water cycle experimental base, the parameter inversion model was established based on the objective function is the minimum of the relative error square sum between the simulated and measured value of the soil moisture content and the constraint is the diversification range of the water movement parameters acquired from the documents. The water transport parameters of soil characteristic in experimental site are acquired by use of the interior point method and model method. The results showed that the simulation accuracy of the field soil moisture dynamic is significantly improved by the parameter inversion. The changed initial value and step scaling factor are in favor of improving parameter optimization results.
soil moisture parameter inversion optimization calculation unsaturated soil hydraulic conductivity winter wheat
Wang Yang-ren Li Yan Sun Shu-hong Zhou Qing-yun Han Na-na
Hydraulic Engineering Department,Tianjin agricultural university,Tianjin, China
国际会议
山东淄博
英文
338-343
2011-05-27（万方平台首次上网日期，不代表论文的发表时间）