水科学与水工程2009，Vol.2Issue(3)：96-109,14.DOI:10.3882/j.issn.1674-2370.2009.03.010
Experimental study and simulations of infiltration in evapotranspiration landfill covers
Experimental study and simulations of infiltration in evapotranspiration landfill covers
摘要
Abstract
Various cover systems have been designed for landfill sites in order to minimize infiltration (percolation) into the underlying waste.This study evaluated the soil water balance performance of evapotranspiration covers (ET covers) and simulated percolation in the systems using the active region model (ARM).Experiments were conducted to measure water flow processes and water balance components in a bare soil cover and different ET covers.Results showed that vegetation played a critical role in controlling the water balance of the ET covers.In soil profiles of 60-cm depth with and without vegetation cover,the maximum soil water storage capacities were 97.2 mm and 62.8 mm,respectively.The percolation amount in the bare soil was 2.1 times that in the vegetation-covered soil.The ARM simulated percolation more accurately than the continuum model because it considered preferential flow.Numerical simulation results also indicated that using the ET cover system was an effective way of removing water through evapotranspiration,thus reducing percolation.关键词
active region model/evapotranspiration cover/percolation control/water balanceKey words
active region model/evapotranspiration cover/percolation control/water balance分类
建筑与水利引用本文复制引用
Wen-xian ZHANG,Zhan-yu ZHANG,Kang WANG..Experimental study and simulations of infiltration in evapotranspiration landfill covers[J].水科学与水工程,2009,2(3):96-109,14.基金项目
This work was supported by the National Natural Science Foundation of China (Grant No.50609019),the National Basic Research Program of China (the 973 Program) (Grant No.2006CB403404),and the National Natural Science Foundation of Tibet. （Grant No.50609019）
