海河流域水生态环境破坏的经济损失估算

利用多种方法估算海河流域水生态环境破坏造成的经济损失，并综合已有相关研究，认为1999年的经济损失相当于流域GDP的0．63%-16．6％。利用影子价格法估算的经济损失相当于流域GDP的7．3％。海河流域现状水生态环境恶化造成的相对经济损失值处在历史高峰期。未来在实施南水北调工程及按照规划开展大规模节水挖潜举措的前提下，经济损失的相对量将大为减少，但是绝对经济损失量可能还会有所增大。向流域节水挖潜领域的项目投资，会给全社会带来较高的经济收益。

An Estimate of Economic Losses Caused by Water Eco-Environment Deterioration in the Hai River Basin

Using diverse methods to estimate the economic losses caused by water ecosystem deterioration in the Hai River Basin and referencing the foregoing studies,this paper concludes the economic losses ranged from 0.63 to 16.6 percent of total river basin's GDP in 1999.The authors recommend 7.3 percent of GDP as a reasonable value,which is calculated by the method of Shadow Price.Current relative economic losses have reached the peak value in the history.Under the preconditions of constructing the Water Transfer from South to North and implementation of water-saving technique according to the planning,the relative economic losses will decrease greatly and the absolute economic losses will be still inclined to rise in the next decades.The investment in the projects of water-saving reform will bring notable economic returns to the whole society.