effective porosity meaning in English

有效空隙度
有效空隙率
有效孔隙度
有效孔隙率

Standard test method for effective porosity and effective air voids of compacted bituminous paving mixture samples
压实沥青铺路混合料样品的有效孔隙率和有效气隙的标准试验方法
Approximate solutions show that the ground water level rises in proportion with rainfall intensity , time and inverse number of the effective porosity of the soil
近似解说明了水位的上升与降雨强度和时间成正比，与土壤的有效孔隙率成反比。