针对造成北方城市水资源短缺的症结所在，基于水资源可持续利用的用水模式，提出科学解决策略，即在配置方法上，注重多源统筹调控; 在利用方向上，实现先内后外，次序开发; 在措施保障上构建水系连通网络。合理配置本地地表水、地下水、再生水、雨洪水、外调水、过境水多资源，提升城市供水保证率; 构建丰枯互济的大水源连通网络，实现地下水采补平衡; 确保外调水与本地水、地表水与地下水、常规水源与应急水源联合调度。以廊坊市为研究区，遵循“先节水后调水，先治污后通水，先环保后用水”的理念，基于“三次平衡”分析思想实现水资源供需平衡。结合廊坊市的水资源平衡分析结果，2030 年廊坊市多年平均缺水量为 0．02 亿 m3 ( 需水量为 13．63 亿 m3，供水量为 13．61 亿 m3) ，缺水率为 0．1%。论文提出解决廊坊市缺水的水量调度原则和绿色水系网络连通方案。研究成果为解决北方缺水城市水量不足问题提供经验借鉴。

Water shortage is becoming more and more serious in North China，and the influence of urban water crisis is becoming more and more extensive． This paper analyzes the key factor of water shortage in northern cities，and offers the strategies to solve the water shortage problem in North China based on the sustainable use of water resources． The strategy includes rational allocation of local surface water， groundwater，reclaimed water，rainwater，water transfer，and pass-by water resources to improve the urban water supply guarantee rate． A large water network is built to achieve groundwater recharge balance and to ensure the joint dispatch of external water and local water，surface and ground water，conventional and emergency water sources． We select Langfang City as a typical area，a city short of water． We follow the basic principle of water supply-demand balance“water-saving first，water transfer second，water pollution control first，water supply second，environmental protection first，water use second”to balance the supply and demand of water resources by an analysis of“three balances”．Based on the results of water balance analysis in typical areas，the average annual water shortage in Langfang in 2030 will be 0．02 billion m3 ( water consumption will be 1．363 billion m3，water supply will be 1．361 billion m3) ，and the water deficit will be 0．1%． This paper supplied the principle of water allocation and the scheme of green water network interconnection for water-lacking cities in North China．