| 腾发覆盖系统的改进及其水文评估 |
| 摘要点击 1057 全文点击 700 投稿时间：2009-08-29 修订日期：2009-11-16 |
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| 中文关键词 垃圾填埋场 改进型腾发覆盖 渗沥控制 水文评估 |
| 英文关键词 landfill innovative evapotranspiration（ET） cover percolation control hydrologic evaluation |
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| 中文摘要 |
| 腾发覆盖系统作为屏障型覆盖系统的替代形式自2003年以来在许多垃圾填埋场整治工程中得到应用，它是一种经济、实用的生态型覆盖系统，但因其壤土层持水力和草本植被蒸腾力的限制，腾发覆盖只适用于干旱和半干旱地区.为了提高渗沥控制效果，对腾发覆盖的结构体系进行了改进:①在单一壤土层底部设置黏土衬垫以提高持水力; ②采用草本-灌木混合植被取代单纯的草本植被以提高蒸腾力.采用HELP软件对屏障型覆盖系统、腾发覆盖系统和本研究提出的改进型腾发覆盖系统进行水文评估，结果表明改进型腾发覆盖系统的渗沥控制性能明显优于前二者. |
| 英文摘要 |
| 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. |
