水是人类社会发展的基础性自然资源和战略性经济资源，也是城市发展的命脉。
Water is the basic natural and strategic economic
resources forthe development of society, the lifeline for urban
development.Beijing was located by mountains and water in history, vitalizedwith
water. Water is the life source of the prosperity of Beijing.
历史上看，北京是依山傍水、因水而兴的城市，水是北京兴旺发达的生命之源。但随着人口规模的不断增长和经济社会的快速发展，水资源短缺已经成为制约北京发展的主要瓶颈。
With continuous increase of population，rapid developmentof economy and society, shortage of
water resources hasturned to the main bottleneck for the development of
Beijing.
