目的：用水质综合指数法对张家岩水库水质进行评价。
Objective:To evaluate wate quality of Zhangjiayan reservoir by using Water Quality Index.
目的：用水质综合指数法对张家岩水库水质进行评价。
Objective: To evaluate water quality of Zhangjiayan reservoir by using water quality Index.
在比较各种水质综合指数计算模式的基础上，提出了一种新模式。
In this paper, virtues and defects of several formulae of calculating comprehensive index of water quality are pointed out, and a new formula is introduced.
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