浅层地下水给水度与水位埋深关系的试验研究

Experimental study of relationship between specific yield and buried depth of shallow groundwater

给水度μ是土壤释水性的一个重要指标,是浅层地下水资源评价和地下水开发利用的重要参数。通过风积砂的室内排水试验,研究浅层地下水给水度与水位埋深的关系,并用不同的公式计算给水度。试验结果表明,风积砂介质的水位埋深小于60 cm时,给水度为一变量,随水位埋深的增大而增大。所选的给水度计算公式中,雷志栋公式计算出的结果与实测数据最相近,可准确表达给水度与水位埋深的关系。

The specific yield is an important index of water releasing of soil, and is also the key parameter for the shallow groundwater resource evaluation and groundwater development and utilization. Through indoor drainage test of eolian sand, the re-lationship between specific yield and buried depth of shallow groundwater is studied and the specific yield is calculated by differ-ent formulas. The experimental results show that when the buried depth of eolian sand media is less than 60 cm, the specific yield is a variable that increases with buried depth. Among the selected calculation formulas of specific yield, the results calculat-ed by Lei Zhidong′s formula are the closest to the measured data, which can express the relationship between specific yield and buried depth correctly.