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填埋場(chǎng)水分運(yùn)移模擬實(shí)驗(yàn)研究

時(shí)間:2023-04-25 22:08:14 環(huán)境保護(hù)論文 我要投稿
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填埋場(chǎng)水分運(yùn)移模擬實(shí)驗(yàn)研究

摘要: 在實(shí)驗(yàn)室中建立了一個(gè)具有填埋場(chǎng)典型構(gòu)造的單元隔室系統(tǒng),研究了蓋層滲透性較強(qiáng)而襯層滲透性較弱和蓋層、襯層滲透性均較弱兩種不同防滲配置下系統(tǒng)內(nèi)的水分運(yùn)移規(guī)律。兩種情況下,蓋層底部與廢物層交界處始終處于非飽和狀態(tài),造成通過蓋層的水分入滲速率遠(yuǎn)遠(yuǎn)大于其設(shè)計(jì)入滲能力(滲透系數(shù)),反映了強(qiáng)透水的廢物層對(duì)蓋層防滲性能的不利影響。兩種配置在防止?jié)B濾液穿透襯層而污染“地下水”方面并無顯著差異,其效率高低主要取決于介于廢物層與襯層之間的排水層工作性能的優(yōu)劣。 Abstract: A laboratory scale model with typical landfill structures wasbuilt to simulate water movement in a landfill with either a medium-permeability cover and a low-permeability liner or both low-permeability cover and liner. In both circumstances, the interface between the cover and the underlying waste was not saturated during the experiment, which results in a much higher infiltration rate through the liner than its designed infiltration capacity (permeability). The results show that high-permeability waste negatively impact on the cover. There is no significant difference in the groundwater pollution due to the leachate for the two cases. The leachate control effectiveness depends mainly on the performance of the drainage layer between the waste and the liner. 作 者: 劉建國(guó)    聶永豐    王洪濤   作者單位: 清華大學(xué)環(huán)境科學(xué)與工程系,北京 100084  期 刊: 清華大學(xué)學(xué)報(bào)(自然科學(xué)版)  ISTICEIPKU   Journal: JOURNAL OF TSINGHUA UNIVERSITY(SCIENCE AND TECHNOLOGY)  年,卷(期): 2001, 41(4_5)  分類號(hào): X705 TU411.4  關(guān)鍵詞: 填埋場(chǎng)    水分運(yùn)移    土水剖面    滲濾液    入滲速率    頂部蓋層    Keywords: landfill    water movement    soil water profile    leachate    infiltration rate    surface cover   

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