Flood management of Dongting Lake after operation of Three Gorges Dam
Flood management of Dongting Lake after operation of Three Gorges Dam
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DOI：
10.1016/j.wse.2017.12.005
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发表时间：
2017-01-01
影响因子：
4
通讯作者：
Wang, Zi-ming
中科院分区：
文献类型：
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作者：
Lai, Xi-jun;Wang, Zi-ming
三峡大坝的全面运行降低了长江中下游地区的洪水风险。但地处长江流域的洞庭湖未来仍面临严重洪涝风险。使用水动力模型研究了 TGD 对洪水过程的影响。分别对三峡大坝运行前后1998年和2010年的洪水事件进行了分析。数值结果表明，三峡大坝的运行改变了洪水过程，包括洞庭湖洪峰的时间和强度。三峡大坝可以有效降低洞庭湖的洪水位，洞庭湖的洪水主要是由长江上游洪水造成的。然而，对于主要由流域内四条主要河流的洪水引发的洪水来说，情况并非如此。鉴于此，需要制定洞庭湖综合防洪策略。进一步完善三峡大坝与流域其他水库的预警系统、联合调度等非工程措施以及传统的工程措施。同时，建议采用可持续的防洪理念，包括自然洪水管理和湖泊恢复，以降低洪水风险。 (c) 2017 年河海大学。由 Elsevier B.V. 制作和托管。这是一篇遵循 CC BY-NC-ND 许可的开放获取文章。
Full operation of the Three Gorges Dam (TGD) reduces flood risk of the middle and lower parts of the Yangtze River Basin. However, Dongting Lake, which is located in the Yangtze River Basin, is still at high risk for potentially severe flooding in the future. The effects of the TGD on flood processes were investigated using a hydrodynamic model. The 1998 and 2010 flood events before and after the operation of the TGD, respectively, were analyzed. The numerical results show that the operation of the TGD changes flood processes, including the timing and magnitude of flood peaks in Dongting Lake. The TGD can effectively reduce the flood level in Dongting Lake, which is mainly caused by the flood water from the upper reach of the Yangtze River. This is not the case, however, for floods mainly induced by flood water from four main rivers in the catchment. In view of this, a comprehensive strategy for flood management in Dongting Lake is required. Non-engineering measures, such as warning systems and combined operation of the TGD and other reservoirs in the catchment, as well as traditional engineering measures, should be further improved. Meanwhile, a sustainable philosophy for flood control, including natural flood management and lake restoration, is recommended to reduce the flood risk. (c) 2017 Hohai University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.