摘要
三峡工程等干支流控制性水库相继建成投运,调节洪水能力增强,中下游超额洪量及其时空分布将发生变化,为蓄滞洪区分类调整创造了条件。考虑三峡工程等干支流水库建成后江湖关系变化,计算了三峡工程建成前以及建成后不同时期中下游超额洪量。结果表明,长江中下游蓄滞洪中荆江分洪区确定为重点蓄滞洪区,其他蓄滞洪区分为重要、一般和蓄滞洪保留区3类。考虑长江上游控制性水库联合运用以及中下游河道冲刷和江湖关系演变,蓄滞洪区分类将适度调整,蓄滞洪区数目可根据防洪形势改善适当减少。
The construction and operation of Three Gorges Project and other reservoirs in upper Yangtze River increase the flood adjustment capacity and cause changes of excessive flood amount in mid-lower Yangtze River and its temporal-spatial distribution, which is beneficial for the classifications and adjustment of original flood storage areas. Considering the changes of river-lake relation after construction of Three Gorges Reservoir and other reservoirs in upper stream, the excessive flood amount of mid-lower Yangtze River in different periods are calculated. The results show that Jingjiang flood storage area should be reserved as the key flood storage area and others can be divided into 3 categories, such as important, normal and reserved flood storage areas. Taking account of joint operation of controlling reservoirs in upper stream, river channel erosion and river-lake relation changes in mid-lower stream, the number of flood storage areas can be reduced according to the actual flood control situations.
出处
《人民长江》
北大核心
2013年第10期48-51,共4页
Yangtze River
关键词
超额洪量
蓄滞洪区
分类调整
长江中下游
excessive flood amount
flood storage area
classification and adjustment
mid-lower Yangtze River
