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本文介绍了农田水分转化关系模型参数的确定方法。以在北京市水科所试验站观测的不同灌溉水平条件下的土壤水分资料为依据 ,进行了参数优选实例计算。并用该模型及其参数求得了该站 1 995年冬小麦不同灌溉供水量条件下的腾发量与根区下界面水分通量。该模型参数求解方法 ,对于充分利用大量的田间土壤水分观测资料研究农田水分转化规律和农田高效用水技术具有十分重要的意义。
This paper introduced the method to determine the model parameters of farmland water conversion. Based on the soil moisture data under the different irrigation levels observed by the experimental station of Beijing Institute of Water Sciences, the parameter optimization example calculation was carried out. Using this model and its parameters, the evapotranspiration under different irrigation water supply conditions and the water flux at the lower root zone of the station from 1995 to 1995 were obtained. The method of solving the model parameters is very important for making full use of a large amount of field soil moisture observation data to study the law of farmland water conversion and high-efficiency farmland water technology.