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饱和土壤在重力作用下通过自由流出的方式排出水分的能力(包括土壤可以释放的水量和释水速度等)一般常称为土壤释水性。从单位体积的饱和土壤中可以释放出来的水的体积,或地下水发生单位水头下降时土壤所能释放出来的水层厚度,叫做土壤的给水度。给水度是表征土壤释水性的主要指标。土壤的给水度是排水工程设计的基本参数,是地下水资源评
The ability of saturated soils to discharge water by gravity (including the amount of water that can be released by the soil and the rate of water release) is often referred to as soil water release. The volume of water that can be released from a unit volume of saturated soil or the amount of water that the soil can release when the unit head of groundwater is lowered is called the water supply to the soil. Water supply is the main indicator of soil water release. Soil water supply is the basic design of drainage engineering parameters, groundwater resources assessment