以发展排水为基础 综合治理旱涝碱咸

华北平原水资源短缺，旱涝碱成灾害是农业可持续发展的主要制约因素。海河的治理，骨干排水河道的开挖疏浚，解决了排洪排涝排成出路，建成华北平原排洪排涝系统。春季开发地下水包括微成水和半咸水抗旱灌溉，井灌井排降低地下水位，增大地下库容，减少径流流失，增多降雨入渗，淋洗土壤盐碱，防治渍涝灾害，把降雨转化为可利用的水资源。秋冬利用深沟引蓄河水，回灌地下水补源，促使地下咸水淡化。地表水地下水联合运用，保持水资源采补平衡。实现旱涝碱成综合治理，水资源可持续利用，经济社会可持续发展，生态环境良性循环。

Developing Drainage as the Basis of Comprehensive Control of Drought,Waterlogging,Salinity and Saling Groundwater

The North China Plain is short of water resources.The disasters caused by drought,waterlogging,salinity and saline groundwater are the main restrictive factors for sustainable development of agriculture.The regulation of Haihe River and the excavation and dredging of main drainage rivers have remarkably improved the drainage outlets to drain floodwater,excessive rainwater and saline groundwater into the sea.Exploiting groundwater,including brackish and semi-saline water by tube wells,has the objectives to c...