基于延拓盲数-网络分析理论的河流健康评价

为提高河流健康评价精度,将模糊理论中的三角模糊数引入盲数系统,形成延拓盲数理论。基于延拓盲数理论构建河流健康评价模型,并采用网络分析法(ANP)确定各评价指标权重。结合通榆河的实际状况,展开河流健康评价,得到各评价指标的分值及不同评价等级的隶属度,从而确定通榆河的河流健康等级为"Ⅲ"类。河流健康问题主要体现在水功能区水质达标率低、生态系统薄弱,应进一步加强河流的修复和管理。

Assessment of river health based on extended blind number and analytical network process theory

In order to improve the accuracy of river health assessment, this paper introduced the triangular fuzzy number in fuzzy theory into blind number system, and formed the extended blind number theory.Based on the theory,it set up the assessment model of river health and determined the weights of evaluation index by analytic network process theory (ANP). Based on the actual situation of Tongyu River,it carried out the river health assessment, and obtained the scores of each evaluation index and the membership degree of the different evaluation grades so as to determine the river health grade of Tongyu River which was grade three.The problem of river health mainly reflected the low rate of water quality and weak ecological system in the water function area.It is necessary to further strengthen the river restoration and management.