三峡工程建成后长江中游应该关注的问题

三峡工程在2008年基本建成后,将为长江中游带来重大的防洪效益;但是,水库大量拦沙将使荆江河段泥沙出现严重不平衡泥沙冲刷将会对长江中游带来深刻的影响和一系列问题。此外,三峡水库的有效防洪能力相对较小,尽管近年来城陵矶附近的防洪形势严峻,但是,单靠三峡工程并不能解决城陵矶附近防洪的问题。从最危险的角度,提出了如果荆江发生严重冲刷和三峡承担城陵矶调度任务等将产生的问题,以便供有关的研究和规划参考。

Problems in the Mid-Yangtze River after the Commencement of the Three Gorges Project (TGP)

The Three Gorges Project (TGP) will bring about tremendous benefits for the mid-Yangtze River after its commencement in 2008. We should, on the other hand, also pay close attention to problems it might incidentally cause. For instance, the trapping of sediment by the TGP reservoir will cause the river downstream of the dam lose its equilibrium in sediment fluxes for a long time and bring about scours and river regime changes in the Jingjiang reach. If too much erosion take place in the Lower part of the Jingjiang reach, the flood conditions for the area around the Chenglingji reach and the Dongting Lake would be seriously affected. It seems to the author that the TGP could not have the ability to protect the said area if the main task in protecting Jingjiang reach should be ensured, since the capacity of the TGP reservoir is comparatively small. The problems for the Chenglingji and Dongting Lake should, however, be carefully studied and well settled with more measures.