【摘要】：運用MIKE平臺建立杜家臺蓄洪區(qū)行洪道MIKE11一維河道模型,模擬并分析了紅星垸堤刨毀前后的分洪道行洪能力。同時搭建MIKE21分洪區(qū)二維模型,并利用MIKE FLOOD動態(tài)耦合一、二維模塊,以此為平臺研究杜家臺分蓄洪區(qū)分蓄漢江夏、秋洪水與長江洪水時的調(diào)度工況。結(jié)果表明:紅星垸堤刨毀后分洪道寬度增加,顯著降低了該處分洪道上游的洪水水位,提高了分洪道分洪能力;漢江低量級來水情況下,杜家臺只需運用南區(qū)1~4垸分洪,而高量級來水下杜家臺需運用1~7垸分洪;長江分洪時,處于下游的第6垸分洪能力顯著,最終可解除第7、9垸的風(fēng)險,只需運用1~6垸�，F(xiàn)有防洪工程中第5、6垸分洪速度較慢且分洪量小,而處于最上游的第2垸分洪量大且分洪較快,導(dǎo)致與其相臨的1~4垸洪水超高,危及7、9垸,故7、9垸堤頂亟待加高,同時5、6垸分洪能力需要增強(qiáng)。
[Abstract]:Based on Mike platform, a one-dimensional channel model of Dujiatai flood storage area is established, and the flood diversion capacity of flood diversion channel before and after the Hongxing embankment is destroyed is simulated and analyzed. At the same time, the two-dimensional model of MiKE21 flood diversion area was built, and the dynamic coupling of Mike flood was used as a platform to study the dispatching conditions of Hanjiang River, autumn flood and Yangtze River flood in Dujiatai flood diversion and storage area. The results show that the width of the flood diversion channel increases after the Hongxing dike is destroyed, and the flood water level in the upper reaches of the flood diversion channel is significantly reduced, and the flood diversion capacity of the flood diversion channel is improved, while in the case of low order water coming from the Hanjiang River, Dujiatai only needs to use the 1 ~ 4 embankment in the Southern District for flood diversion. The flood diversion capacity of the sixth embankment in the lower reaches of the Yangtze River is remarkable, and the risk of the 7th embankment can be finally relieved, only 1 and 6 embankments should be used. In the existing flood control works, the speed of flood diversion in the 5th and 6th embankment is slow and the flood diversion volume is small, while the second embankment in the upper reaches of the embankment has a large amount of flood diversion and fast flood diversion, which leads to the super-high flood of the 1 ~ (4) embankment adjacent to the embankment and endangers the 7 ~ (9) embankment. Therefore, the top of the No. 7 ~ (9) embankment needs to be raised urgently. At the same time, the flood diversion capacity of embankment needs to be strengthened.
【作者單位】： 華中科技大學(xué)水電與數(shù)字化工程學(xué)院;湖北省防汛抗旱指揮部辦公室;
【分類號】：TV873

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