The use of Dujiatai flood diversion channel in 2005 and 2011 provided a new idea of regulation mode for medium and small floods in Hanjiang River, achieving the goal of minimum loss and maximum safety. According to the present condition and regulation schemes of Dujiatai diversion area, a 1D and 2D coupled numerical model was established on the basis of hydrodynamic software MIKE to simulate the flood discharge ability and effects of Dujiatai flood diversion channel. Hanjiang River, Dujiatai flood diversion channel and inner embankments are taken into account in the model.Results show that the safe discharge of Dujiatai flood channel is about 2000-2500 m3/s, except for the insufficient embankment top elevations at Xinnongyuan and Zhangchen Lake when Hankou station is at a higher water level. In addition, when Hanjiang River suffers from design flood, operation of Dujiatai flood diversion channel in priortity could obviously reduce flood losses. In conclusion, the results offer reference for improving regulation modes of Dujiatai diversion project and other similar projects.
Key words
Dujiatai diversion and storage project /
flood discharge capacity /
MIKE /
flood propagation /
numerical simulation
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 翁朝晖,王 煌,张晚祺.杜家台分蓄洪区的必要性及洪道行洪能力研究[J].人民长江,2006,37(4):50-52.
[2] 覃莲超,余明辉,李二明,等.杜家台分蓄洪区洪水调度数值模拟及分洪效果研究[J].泥沙研究,2011,(4):38-43.
[3] 张 军,皮凌华,向德明,等.杜家台分蓄洪区运用预案研究[J].中国防汛抗旱,2012,22(3):44-45.
[4] 肖立国,王卫民,陶圣红,等.汉江杜家台分洪工程行洪道分流效果分析[J].中国水利,2012,(9):48-50.
[5] 湖北省防汛抗旱指挥部汉江防汛办公室.杜家台分蓄洪区运用预案[R].武汉:湖北省防汛抗旱指挥部汉江防汛办公室,2014.
[6] 湖北省水利水电勘测设计院.杜家台分蓄洪区洪道应急整治工程实施方案[R].武汉:湖北省水利水电勘测设计院,2012.
[7] 廖威林,周小文,何勇彬.城市地区水库溃坝洪水演进模拟[J].长江科学院院报,2014,31(10):98-103.
PDF(2578 KB)
