Flood, arid and water-short, water ecology and environment deteriorate, especially the relative lack of water resources, have already become the main factors that restrain social economy development.

• 洪涝灾害、干旱缺水、水生态环境恶化三大问题,特别是水资源短缺问题,已经成为我国社会经济发展的制约因素。