Research on water quality appraisal and water environmental capacity of Zhelin Reservoir is necessary.

因此，本文展开对柘林水库水质评价和水环境容量的研究。

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It is necessary to make a deep research in the environmental planning and management of the Reservoir.

因此，有必要对水利枢纽环境管理与规划的问题进行深入研究和探讨。

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The paper explains even the environmental evaluation content of reservoir dam, flood control project, irrigation and drainage project.

文章还对水库大坝、防洪和灌排等类水利项目的环境评价的内容进行了概述。

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Thankfully, because the reservoir was almost entirely gas, there was little environmental damage.

FORBES: Chevron's Expensive Problems

Repair work has also continued on the reservoir itself amid fears that what is already Hungary's worst environmental disaster could even get worse.

BBC: Hungary builds wall to slow possible new sludge wave