Comprehensive evaluation of urban water-saving based on AHP-TOPSIS

ABSTRACT A comprehensive evaluation of water-saving is a measurement of the degree of efficient use of water resources in a region. The scientific evaluation of water-saving management and capacity in a region is an important basis for formulating water-saving development management and policies. By analyzing the operation mechanism of the urban water cycle, this study aims to explain the interaction between urban operation and ecological cycle, establish a different perspective on water conservation in traditional cities, and apply analytic hierarchy process and technique for order preference by similarity to an ideal solution to construct an evaluation model of water- saving. By using this model to analyze the state of water-saving in Henan Province for nearly 10 y of saving water. It is concluded that the overall water-saving status of Henan Province is at a general degree, however, various water-saving capabilities are gradually increasing. Among them, the largest contribution is water-saving in production. The water-saving level of Henan province decreased in 2009 and 2013, which was caused by the decrease of water-saving capacity in life, agriculture, and ecology. In the areas where water resources are scarce and water-saving capacity is average, a more moderate economic and water-saving policy should be formulated.