随着珠江三角洲经济区经济建设的发展，城市用水急剧增加，加上河道水质污染加重，水的供需矛盾日益紧张，故编制城市供水水源规划成为城市建设的当务之急。本文着重对规划中有关城市需水量预测的城市生活、工业和农业需水量及水量供需平衡计算，供参考。 With the development of economic construction in the Pearl River Delta Economic Zone, the rapid increase in urban water use and the increased water pollution in rivers, the tension between water supply and demand has become increasingly tense. Therefore, the preparation of urban water supply planning has become an urgent task for urban construction. This paper focuses on the calculation of urban living, industrial and agricultural water demand and water supply and demand balance for the prediction of urban water demand in the plan for reference.