冬小麦田间墒情预报的经验模型
Empirical Model for Soil Moisture Forecast in Winter Wheat Field
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摘要: 基于土壤水分变化率与贮水量成正比这一假定,得出了土壤水分的指数消退关系。在此基础上,建立了冬小麦生育期土壤墒情预报的经验递推模型,并对模型进行了检验,表明模型预报效果较好。该模型的特点是模型简单且参数较少;其主要局限性是模型中土壤水分消退系数地域、时域性较强Abstract: Based on an assumption that the depletion of soil water is proportional to soil water storage, the exponential depletion relation of soil water is obtained. As a result, an empirical model is proposed to forecast soil moisture regime in the growing season of winter wheat. The model is simple with few parameters, but spatial and temporal variability of soil water depletion coefficient limits the use of the model.