长江三峡工程对河口近海区理化环境要素的影响

Influence of Three-Gorge engineering on the environment of Changjiang River estuary region

本文在调查研究的基础上,论述了长江径流的主要作用,并且给出了长江径流量分别与含沙量、营养盐含量的经验关系,同时阐述了河口近海区水动力条件,给出了径流量与沿岸锋锋位的回归关系。根据上述关系及长江三峡工程运行预案,研究了工程兴建后可能对河口近海地区理化环境要素分布的影响。研究表明,该工程兴建后虽对河口近海产生一定的影响,但并不会超出历史上自然变化对其影响的范围及程度。

On the basis of historical and present investigations. we discussed the main actions of Changjiang runoffs, and gave out the relations of the amount of runoff with the contents of silt and nutrient salt. We also exponded the hydrodynamie condition of Changjiang estuary, and gave the regression relation of the coastal front-place with the runoff. According to the relations and the Three-Gorge engineering project, we discussed the influence of the engineering on the Changjiang estuany.