各位专家、各位朋友、女士们、先生们：
非常荣幸地同大家一起探讨城市水管理问题。北京是这次世界水大会的受益者，获得各位专家学者的真知灼见，有助于提高北京水务的管理水平。
Beijing
is the beneficiary of the World Water Congress. Thecorrect and profound insights
of the experts are helpful toimprove the water management in Beijing.
受季风气候影响，北京降水时空分布极为悬殊，年内降水70%以上集中在汛期三个月，年际丰枯交替，多年平均降水585毫米。
With the impact of monsoon, time and spatial distribution
of precipitation is extremely unbalanced, over 70% centralizing in three summer
months in one year. Wet and dry years rotates in term of several years, Average
annual precipitation in Beijing is 585 mm.
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