River water quality has deteriorated rapidly that has been a new carrier of pollutant to decrease environmental capacity of water.
市郊小城镇河网水质急剧恶化，已成为新的水环境污染载体，使水体环境容量下降。
Examining the toxic effect of heavy metal pollutants is essential for exploring heavy metal water environmental capacity.
考查重金属污染物的毒性效应是探讨重金属水环境容量的基本出发点。
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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