Study On The Flood Control Level Of The Chenglingji Of The Yangtze River

In this paper, based on the analysis of the flood control relationship between the Dongtinghu Lake and The Yangtze river, as well as the flood control situation nearing the Chenglingji, especially by taking into account the serious flood occurred in year of 1998, several representative schemes for the flood control level of the Chenglingji were comprehensively studied, which reveals that the flood control level of the Chenglingji is of essentially importance to the flood control of both the Yangtze river and Dongtinghu Lake. On the basis of the up-to-date stage-discharge cure and the River-Lake storage capacity cure, a new working cure was obtained, and by evoking the widely used hydrology model, the flood routing model for the Lake was developed. The impact on flood diversion amount of the modified flood control level of the Chenglingji on Jingjiang reach, Chenglingji reach, and Wuanhan City reach was evaluated, and the flood control level of the Chenglingji was recommended to be 34.90 by considering the feasibility of the practical operation, relationship between the River and the Lake, the safety discharges of each reach, and the harmonic flood control strategy of upstream and downstream...