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提高三峡水库对城陵矶地区的防洪作用问题现在可以列入议事日程了。本文比较了二种对城陵矶的补偿调节方式,从中可以看出不能迥避洪水的气象预报问题。从各种防洪库容分配方案的已有成果看,单纯降低20年一遇以内洪水的沙市水位(相应加大这部分防洪库容)所起的作用大于对城陵矶进行补偿的作用。今后在研究补偿调节的同时,应重视三峡防洪库容的合理分配问题。文章同时初步分析了水库汛后放水对库区淤积的影响问题。
The issue of improving the flood control effect of the Three Gorges Reservoir on the Chenglingji area can now be put on the agenda. This paper compares two kinds of compensation adjustment methods for Chenglingji, from which we can see the weather forecast problem that can not avoid the flood. Judging from the existing achievements of various flood-storage capacity allocation schemes, simply reducing the water level at the city level (correspondingly increasing this part of flood control capacity) within one-year floods is more effective than compensating Chenglingji. In the future while studying the adjustment of compensation, we should attach importance to the rational allocation of flood control capacity of the Three Gorges Reservoir. At the same time, the article also analyzes the impact of reservoir discharge after the flood on sedimentation in the reservoir area.