标识污染功能指数的创建及在汉江水质测评中的应用

为准确测评汉江安康段水质，基于水体水质评价的确定性方法，以GB 11607—1989《渔业水质标准》建立标识污染功能指数进行水质测评，并与以GB 3838—2002《地表水环境质量标准》建立的污染指数测评结果作比较。结果表明：汉江安康段为地表水Ⅱ类水质，为宜渔水体区，属氮磷轻微污染水域。标识污染功能指数测评结果与叠加污染指数法、算术平均污染指数法和内梅罗污染指数法高度拟合，能准确表达水体质量和功能，并可进行水体间相互比较。说明标识污染功能指数可作为汉江水体的测评指标。

Establishment of Identification Pollution Function Index and Its Application in Water Quality Assessment of Hanjiang River

In order to accurately measure the water quality of Ankang section of the Hanjiang River, based on the deterministic method of the water quality evaluation, the methods of the Identification Pollution Function Index based on Water Quality Standard for Fisheries (GB 11607-1989), and the Pollution Index based on the Environmental Quality Standards for Surface Water (GB 3838-2002) were constructed respectively, and the measurement results compared. The results showed that the water quality of Ankang section of the Hanjiang River is Grade Ⅱ of surface water and suitable for fishing, being slightly polluted by N and P. The results derived from the Identification Pollution Function Index were strongly consistent with those from Overlaying Pollution Index, Arithmetic-average Pollution Index and Nemerow Pollution Index, and are able to accurately express the quality and functions of water body and to compare the water quality among different water bodies. The Identification Pollution Function Index can be used as evaluation index for the water body of the Hanjiang River.