On the other hand new water-supply source is urgently demanded for the scarcity of urban fresh water .

另一方面，城市淡水资源匮乏，迫切需要寻找新的 供水 水源。

Research on Runoff Characteristic and Water-supply Risk of Water Resources Source System of Western Route of South to North Water Transfer Project

南水北调西线工程 水源系统径流特征及 供水风险问题的研究

Urban Water-supply is composed of three parts : getting water from source purifying water in waterworks distributing water via pipe network .

城市 供水系统主要由三个环节组成： 水源取水、净水处理、管网输送。

At present urban water-supply source is the surface water .

目前城市主要的 供水 水源为地表水。