[Innovative ET cover system and its hydrologic evaluation].
The evapotranspiration (ET) cover system,as an alternative cover system of landfill, has been used in many remediation projects since 2003. It is an inexpensive, practical,and easily maintained biological system, but is mainly favorable in arid and semiarid sites due to limited water-holding capacity of the single loam layer and limited transpiration of grass. To improve the effectiveness of percolation control, an innovative scheme of ET was suggested in this paper: (1) a clay liner was added under the single loam layer to increase the water-holding capacity; (2) combined vegetation consisting of shrub and grass was used to replace the grass cover. Hydrologic evaluation of conventional cover,ET cover and the innovative ET cover under the same condition was performed using the computer program HELP, which showed the performance of the innovative ET cover is obviously superior to that of ET cover and conventional cover.
Liu
Chuan-shun
CS
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China. lcswu@163.com
Cai
Jun-xiong
JX
Wang
Jing-zhai
JZ
Rong
Yu
Y
D001673:Biodegradation, Environmental; D008962:Models, Theoretical; D063245:Plant Development; D018526:Plant Transpiration; D010944:Plants / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil / Q000032:analysis*; D014872:Water Movements; D014876:Water Pollution / Q000032:analysis*
D012987:Soil