基于路径熵的供水管网水质可靠性评价

利用路径熵的分析方法，借助概率空间的概念，解释、定义了管网水质熵，并推导了管网水质熵的计算公式，同时根据该计算公式建立了水质熵计算模型．在此基础上，定义了单水源管网的水质最大熵与相对水质熵的概念，并以相对水质熵表征管网水质可靠度．经对某市开发区供水管网分析计算，绘制出该管网等水质可靠度分布图，利用此方法可以直观地找到管网水质可靠度较低的区域，并分析其造成的原因，为管网有针对性的改造扩建提供了重要依据．

Path Entropy Method for Reliability Assessment of Water Quality in Water Distribution Networks

The path entropy method was employed in this paper to assess water quality reliability in distribution net- works. Based on the concept of probability space, both interpretation and definition of water quality entropy were given. After analyzing the definition of water quality entropy, the calculation formula and the calculation model of water quality entropy were derived and built. Meanwhile, the concepts of maximum water quality entropy and rela- tive water quality entropy were presented, and water quality reliability in single-source networks was quantified by the value of relative water quality entropy. The proposed methodology was applied to an example network in North China and contour map of water quality reliability was drawn. The vulnerable area was identified through checking the reliability contour map. The facts that may make system v-ulnerable were analyzed and the measures to improve water quality reliability were proposed.