基于证据推理的流域水质综合评价法——以湘江水质评价为例

胡东滨, 蔡洪鹏, 陈晓红, 孟凡永, 罗岳平, 潘海婷

Comprehensive assessment of water quality based on evidential reasoning： Taking the Xiangjiang River as an example

HU Dongbin, CAI Hongpeng, CHEN Xiaohong, MENG Fanyong, LUO Yueping, PAN Haiting

表1 地表水水质类别的质量标准

Table 1 Quality standard for surface water quality classification

评价指标 标准值 Ⅰ类水质 Ⅱ类水质 Ⅲ类水质 Ⅳ类水质 Ⅴ类水质 pH(无量纲) 7 7.5或6.5 8或6 8.5或5.5 9或5 DO ≥ 7.5 6.0 5.0 3.0 2.0 PI ≤ 2 4 6 10 15 NH4+-N ≤ 0.15 0.50 1.00 1.50 2.00 Pb ≤ 0.01 0.01 0.05 0.05 0.10 TP ≤ 0.02 0.10 0.20 0.30 0.40 As ≤ 0.05 0.05 0.05 0.10 0.10 Cd ≤ 0.001 0.005 0.005 0.005 0.010