| 湿润气候区带膨润土垫ET封顶的性能分析 |
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| 引用本文： | 邱清文,张文杰.湿润气候区带膨润土垫ET封顶的性能分析[J].土木工程学报,2011(Z2). |
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| 作者姓名： | 邱清文 张文杰 |
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| 作者单位： | 上海大学; |
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| 基金项目： | 国家自然科学基金(50908140); 上海大学研究生创新基金(SHUCX112339) |
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| 摘 要： | ET(evapotranspiration,腾发)封顶目前主要用于少雨地区的填埋场,本文考虑1500mm的年降雨量,分析一种加膨润土垫(GCL)的新型土工复合ET封顶在湿润地区的工作性能。建立渗流-腾发耦合模型,计算此新型ET封顶和典型单层土ET封顶的地表径流量、地表蒸发量、植被蒸腾量、最终透水量,对比分析两种ET封顶内的水分运移规律及其工作性能。结果表明:新型ET封顶产生的地表径流总量多于典型单层土ET封顶;新型ET封顶通过膨润土垫的低渗透性使上部土层能够储存更多的水分用于后期腾发,其腾发量大于典型单层土ET封顶,尤其是在降雨高峰期更为明显;在该地区,总厚度1.2m的典型单层土ET封顶并不能有效阻止水分渗透到填埋场中,而新型ET封顶能够满足设计要求。
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| 关 键 词： | ET封顶 膨润土垫 腾发作用 性能分析 |
Analyses on performance of evapotranspiration cover with GCL in humid region |
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| Qiu Qingwen Zhang Wenjie.Analyses on performance of evapotranspiration cover with GCL in humid region[J].China Civil Engineering Journal,2011(Z2). |
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| Authors: | Qiu Qingwen Zhang Wenjie |
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| Affiliation: | Qiu Qingwen Zhang Wenjie (Shanghai University,Shanghai 200072,China) |
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| Abstract: | Evapotranspiration(ET) covers are mainly used in arid or semi-arid regions.The performance of a new-type ET cover with GCL is analyzed considering an annual rainfall of 1500 mm.Surface runoff,soil evaporation,transpiration and final percolation of the new ET cover and a monolithic ET cover were analyzed using a seepage-evapotranspiration coupled model.Water movement and performance of the two covers were evaluated.The results show that surface runoff of the new ET cover is larger than that of a monolithic E... |
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| Keywords: | ET cover GCL Evapotranspiration performance evaluation |
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