基于模糊数学模型的黄河兰州段水环境质量综合评价

A Comprehensive Water Environment Quality Evaluation in Lanzhou Section of the Yellow River by the Use of Fuzzy Mathematical Model

运用模糊数学模型对黄河兰州段的水质状况进行了综合评价.研究结果显示:黄河兰州段水质状况整体为Ⅴ级重污染,四个监测断面的14项污染因子中粪大肠菌群对黄河兰州段水质污染的贡献值最大.权重最大值出现在中山桥断面,为77.85%,包兰桥断面挥发酚超标,其他各项监测因子都以优、良为主.

Thus an estimation of the water quality of the Yellow River in the section of Lanzhou is made by using of fuzzy mathematical model, whose outcome shows that the overall quality of the Yellow River in the segment of Lanzhou is rated Grade V in water pollution. Among the 14 pollutants monitored in the 4 monitor profiles, coliform poses the biggest threat to the water quality, whose maximum value reaches up to 77.85 % （monitored in the Zhongshan Bridge monitor profile）. Volatile phenol exceeds the acceptable norm in the Baolan Bridge monitor profile. The other monitored factors are rather satisfactory.