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通过测定和分析北京市废弃关停矿山4个矿区3种立地类型的土壤水分特征曲线及土壤物理指标表明,经验方程θ=aS-b对北京市废弃关停矿山的土壤水分特征曲线有良好的模拟性,土壤有效水的上限(田间持水量)为0.01 MPa土壤水吸力所对应的土壤湿度,易有效水和难有效水的土壤水吸力界点以0.1 MPa为宜。从a值和ab值比较北京市废弃关停矿山土壤的持水性能和供水性能为:未被干扰区域>修复区域>被破坏区域。
By measuring and analyzing the soil moisture characteristics and soil physical characteristics of the three site types in four mining areas in Beijing, it shows that the empirical equation θ = aS-b has good soil moisture characteristics for the abandoned mine in Beijing The upper limit of soil available water (field water holding capacity) is 0.1 MPa. Soil moisture corresponding to 0.01 MPa of soil water suction, 0.1 MPa is the ideal point of soil water suction of easy-effective water and difficult-to-effectively water. Comparing the water-holding performance and water supply performance of waste-shutdown mine in Beijing with a-value and ab-value are: undisturbed area> restoration area> damaged area.