北方缺水中国大陆受季风影响,降水量夏多冬少、南多北少。而且在时程上降水高度集中,常导致洪灾和旱灾交替发生。因季风出现的频率、强度及挟带水汽量等在各年间有所不同,降水的年际变化也很大,常有连续多年的丰水和连续多年的少水情况的出现,加剧了洪灾和旱灾的严重性。在我国北方,尤以旱情为重。针对降水的地域、季节和年际变化,解放以后,采取了兴修水库,拦蓄地表径流,以及打取地下水等办法,对缓解北方水资源紧缺方面起了极重要的作用。但是,这还不能从根本上解决北方干旱问题。如何从根本上解决这个问题呢? Water shortage in northern China Affected by the monsoon, the precipitation is less in summer and more in winter and less in the south and more in the north. Moreover, the high concentration of precipitation on the schedule often leads to alternating floods and droughts. Due to the frequency, intensity and amount of water vapor that occur during the monsoon period, the annual variation of precipitation varies greatly, often resulting in many years of abundant water and years of continuous low water conditions, exacerbating floods and The severity of the drought. In northern China, especially in the drought. In view of the regional, seasonal and interannual variations of precipitation, after the liberation, it has played an extremely important role in alleviating the shortage of water resources in the north by taking measures such as rebuilding reservoirs, intercepting surface runoff and taking groundwater. However, this still can not fundamentally solve the problem of drought in the north. How to solve this problem fundamentally?