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Erschienen in:
2023 | OriginalPaper | Buchkapitel
On the Flood Reduction Effect of Reservoirs in the Vu Gia—Thu Bon Basin in October 2020 Flood
verfasst von : Hoa Nguyen Thi Thanh, Hong Tran Thi My, Thao Nguyen Thi Thach, Giang Le Song
Erschienen in: ICSCEA 2021
Verlag: Springer Nature Singapore
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Abstract
In October of 2020 on the Vu Gia—Thu Bon river basin, there were two large floods. Due to resulting heavy losses, there have been doubts about the effects of upstream reservoirs in flood prevention and control. The aim of this study was to re-evaluate the role of those reservoirs. The numerical modeling method was used for this analysis. An integrated 1D/2D model was developed using the flow in the rivers was as 1D and the flow on the floodplains as 2D. There are two computational scenarios to be considered. In scenario considering the presence of the reservoirs, the discharge imposed at the upper model boundary is the actual one. This discharge is the result of operation of the reservoirs. In the scenario considering no reservoirs, the discharge imposed at the model upper boundary is calculated from the actual discharge to the reservoirs, with the regulation of the reservoirs neglected. The simulation results of these two flood scenarios clearly show that the reservoirs have significantly reduced floods downstream.