【摘要】 利用东北地区1993—2009年6—8月旬土壤湿度资料,首先采用CAST聚类法对该区域土壤湿度进行气候分区,再以土壤水量平衡原理为依据,在考虑有物理意义的影响因子基础上,分别对每个分区建立统计回归模型,并验证模型的适用性。结果表明:模拟精度在78.8%～88.2%之间,该模型对于东北地区夏季的旬土壤湿度具有一定的推算能力,可以作为一种可应用的模拟方法。更多还原

【Abstract】 Based on the data(1993—2009) of dekad soil moisture observed during June to August,by using the statistical method of CAST,the climatic classification and compartment of soil moisture in northeast China have been studied.By using the soil moisture balance equation and considering the influential factors of soil moisture,a statistical regression model was formed respectively for each region.Then an experimentation was carried out to study the applicability of the statistical regression model.The results show that the simulation precision of the model is about 78.8%-88.2%.So we can draw a conclusion that the model can be used to simulate and calculate summer soil moisture in northeast China.更多还原