南水北调中线工程是保证天津经济发展的重要条件

天津是北方重要的交通枢纽，综合性工业基地，现代化国际港口城市。总面积１．１万平方公里，总人口９２０万人，人均水资源量４７３立方米，仅为全国的１８％，各河进入市境的水量逐年减少。过境入海水量５０年代为１４４．３亿立方米，至８０年代降至９．８亿立方米，汛后各河基本无水可取，中央决定再次引黄救急，并于１９８３年兴建引栾入津工程。引栾水后人均水资源量也仅５９７立方米，仅占全国平均的２２．７％。最新预测，本

S-to-N water transferring:an important condition ensuring economic development of Tianjin city

Tianjin is an important city and main communication center of north China with its comprehensive industrial base,international modernized port,and a total poplation of 9.2 million people on an area of 11000 square kilometers.The annual runoff coming from rivers into Tianjin district is becoming less and less,with 14 430 million cubic meters of water flowing annually into sea through Tianjin district in 1950's and 980 million cubic meters in 1980's.Incoming rivers almost offer little water except in flood season every year. Diverting water from Luanhe river project was constructed in 1983;since then annual water quota per capita in Tianjin has increased from original 473cubic meters merely to 597 cubic meters,that remains at a 22.7% of the China's average.This means that Tianjin city suffers seriously from shortage of water.The middle route S-to-N water transferring project will convey good quality water from the Danjiangkou reservoir on Hanjiang river to supply Tianjin city and provide an important condition ensuring economic and social development of Tianjin city.And early implementation of this project is eagerly expected.