Water, Volume 17, Issue 10
2025 May-2 - 151 articles
Cover Story: Backwater phenomena occur in many river confluences and reservoirs around the world, severely increasing flood risk. Large river-type reservoirs represent key integrated engineering projects for flood regulation, power generation, navigation and water supply, while causing frequent inundations in the reservoir tail due to backwater effects in high-flow conditions. This study revealed exceptional backwater effects on wedge storages and flood stages using HEC-RAS modeling in the large river-type Feilaixia Reservoir in the North River, South China. The ratios of wedge storages to static water storages were 125% and 147% during both flood events in June 2022 and April 2024, increasing up to 199%. The backwater effect is influenced by flood flow and river channel topography and should be carefully considered in operational flood regulation and levee height design in reservoirs. View this paper - Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
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