西藏垃圾填埋场蒸散覆盖土壤储水量分析

摘要

采用现场试验的方法,开展了西藏蒸散覆盖垃圾填埋场试验,揭示不同植物生长条件下垃圾填埋场覆盖层储水量动态变化规律.结果表明,裸地土壤水分的变化主要发生在40 cm以上的土层内,其余3种覆盖层土壤的水分消耗发生在整个土层内;计算出土壤水库实际达到的最大储水量分别为66.5 mm(处理1)、88.4 mm(处理4)、96.3 mm(处理3)和82.6 mm(处理2).%Employing field-test method,the evapotranspiration cover experiments in landfill of Tibet were conducted,and the dynamic changes of water storage of cover soils under different plant growth conditions were revealed.The results showed that the soil water changes of bare land occurred mainly in soil layer over 40 cm,while that of other three cover soils occured in whole soil layers.The actual maximum water storage capacities of cover soils were 66.5 mm (Experiment 1),88.4 mm (Experiment 4),96.3 mm(Experiment 3),and 82.6mm(Experiment 2) respectively.