Combined reticular blind drainage and vertical hierarchical drainage system for landfills located in areas with high rainfall and high groundwater level  

作　　者：Wenjing LU Zhonge FU Yan ZHAO 

机构地区：[1]School of Environment, Tsinghua University, Beijing 100084, China [2]Loudi Civil and Architecture Society, Loudi 417000, China [3]School of Environment, Beijing Normal University, Beijing 100875, China

出　　处：《Frontiers of Environmental Science & Engineering》2016年第1期177-184,共8页环境科学与工程前沿（英文）

基　　金：This research project was funded by the National High Technology Research and Development Program of China （Grant No. 2007AA06Z350）, the National Natural Science Foundation of China （Grant No. 41101225）, and the Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China （No. SWMES 2011-11）. The authors would like to express sincere thanks to Mr. Luis Miguel for help in language correction.

摘　　要：A novel water control technology that com- bines the features of a reticular blind drainage system and a vertical hierarchical drainage system is developed and applied in the Yanziyan Sanitary Landfill, which is located at an area （Loudi City, Hunan Province, China） with high rainfall and high groundwater level. The reticular blind drain system, which was installed on the bottom and side walls of the landfill site, can conveniently guide the flow of groundwater out of the site while preventing a disorga- nized flow of groundwater. The vertical hierarchical drainage system was installed to separate rainfall water and leachate in the landfill site, thus efficiently reducing the pressure of leachate treatment. The whole drainage system plays a key role in foundation stabilization by seepage control and separation and in the instant drainage of rainfall water. The leachate reduction efficiency of the drainage technology was calculated in terms of leachate production before （336519 m3） and after （29664 m3） technology application. Over 90% of leachate derived from rainfall water and groundwater inflow was avoided upon installation of the vertical hierarchical drainage and reticular blind drainage systems. The technology can thus be popularized and applied for water control in landfills located in areas with high rainfall and high groundwater level. The proposed technology can be used to alleviate the pressure of leachate treatment and to reduce the risk of instability.A novel water control technology that com- bines the features of a reticular blind drainage system and a vertical hierarchical drainage system is developed and applied in the Yanziyan Sanitary Landfill, which is located at an area （Loudi City, Hunan Province, China） with high rainfall and high groundwater level. The reticular blind drain system, which was installed on the bottom and side walls of the landfill site, can conveniently guide the flow of groundwater out of the site while preventing a disorga- nized flow of groundwater. The vertical hierarchical drainage system was installed to separate rainfall water and leachate in the landfill site, thus efficiently reducing the pressure of leachate treatment. The whole drainage system plays a key role in foundation stabilization by seepage control and separation and in the instant drainage of rainfall water. The leachate reduction efficiency of the drainage technology was calculated in terms of leachate production before （336519 m3） and after （29664 m3） technology application. Over 90% of leachate derived from rainfall water and groundwater inflow was avoided upon installation of the vertical hierarchical drainage and reticular blind drainage systems. The technology can thus be popularized and applied for water control in landfills located in areas with high rainfall and high groundwater level. The proposed technology can be used to alleviate the pressure of leachate treatment and to reduce the risk of instability.

关 键 词：LANDFILL reticular blind drain vertical hier-archical drain guidance and drainage impermeable layer 

分 类 号：P332.1[天文地球—水文科学] TU992.03[水利工程—水文学及水资源]