基于层次分析法的大连市大沙河流域水质综合评价

Comprehensive Evaluation of Water Quality in Dashahe Basin of Dalian City Based on AHP

基于层次分析法建立了大连市大沙河流域水质综合评价模型,综合评价了该流域各监测断面水质情况。结果表明,大沙河流域设置的五个监测断面中,刘大水库入口、刘大水库、洼子店闸和麦家铁路桥四个断面水质分别为Ⅰ、Ⅱ、Ⅱ、Ⅳ类,满足水功能区要求的水质标准;元台大桥监测断面水质为Ⅴ类,低于水功能区要求的水质目标3个级别。可见层次分析法评价结果真实地反映了大沙河流域水质状况,具有较好的实用性,可以为环境决策提供比较有效的辅助决策信息,对于水环境保护和实现可持续发展具有重要意义。

Comprehensive evaluation model of water quality in Dashahe Basin was established based on the analytic hierarchy process(AHP).The results show that among the five monitoring section of Dashahe Basin,the water quality classification of Liuda reservoir inflow,Liuda reservoir,Wazidian sluice gate and Maijia railway bridge were classⅠ,Ⅱ,Ⅱand classⅣrespectively,which meet the standard of water function requirements.Water quality of Yuantai bridge monitoring cross-section was graded for classⅤ,which is substandard three levels of water function requirements of water quality goal.The evaluation results of AHP reflected the real status of water quality in Dashahe Basin,and the practicability can be more effective in environmental policy making for auxiliary decision-making.It is also a great significance for water environment protection and sustainable development.