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Flood Season Staging and Adjustment of Limited Water Level for a Multi-Purpose Reservoir

Chongxun Mo / Juan Deng / Xingbi Lei / Yuli Ruan / Shufeng Lai / Guikai Sun / Zhenxiang Xing

A reasonable flood season delineation can effectively implement staged reservoir scheduling and improve water resource efficiency. Therefore, this study is aimed at analyzing the flood period segmentation and optimizing the staged flood limit water levels (FLWLs) for a multi-purpose reservoir, the Longtan Reservoir, China. The rainfall seasonality index ( $S I_{P}$ ) and the runoff seasonality index ( $S I_{R}$ ) are used to evaluate the feasibility and rationality of the flood period staging. The fractal method is then used to segment the flood season. Finally, the design flood is carried out to optimize the staged FLWLs. The results show that the $S I$ is an effective indicator for judging the feasibility and verifying the rationality of flood segmentation. The flood period can be segmented into the pre-flood season (12 April–29 May), the main flood season (30 May–3 September), and the post-flood season (4 September–9 November). The FLWLs in the main flood and the post-flood season can be raised by 2.05 m and 3.45 m, and the effective reservoir capacity is increased by 5.810 billion m³ and 6.337 billion m³, according to the results of the flood season division.

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Flood Season Staging and Adjustment of Limited Water Level for a Multi-Purpose Reservoir

Chongxun Mo / Juan Deng / Xingbi Lei / Yuli Ruan / Shufeng Lai / Guikai Sun / Zhenxiang Xing

A reasonable flood season delineation can effectively implement staged reservoir scheduling and improve water resource efficiency. Therefore, this study is aimed at analyzing the flood period segmentation and optimizing the staged flood limit water levels (FLWLs) for a multi-purpose reservoir, the Longtan Reservoir, China. The rainfall seasonality index ( $S I_{P}$ ) and the runoff seasonality index ( $S I_{R}$ ) are used to evaluate the feasibility and rationality of the flood period staging. The fractal method is then used to segment the flood season. Finally, the design flood is carried out to optimize the staged FLWLs. The results show that the $S I$ is an effective indicator for judging the feasibility and verifying the rationality of flood segmentation. The flood period can be segmented into the pre-flood season (12 April–29 May), the main flood season (30 May–3 September), and the post-flood season (4 September–9 November). The FLWLs in the main flood and the post-flood season can be raised by 2.05 m and 3.45 m, and the effective reservoir capacity is increased by 5.810 billion m³ and 6.337 billion m³, according to the results of the flood season division.

Flood Season Staging and Adjustment of Limited Water Level for a Multi-Purpose Reservoir

Chongxun Mo / Juan Deng / Xingbi Lei / Yuli Ruan / Shufeng Lai / Guikai Sun / Zhenxiang Xing

A reasonable flood season delineation can effectively implement staged reservoir scheduling and improve water resource efficiency. Therefore, this study is aimed at analyzing the flood period segmentation and optimizing the staged flood limit water levels (FLWLs) for a multi-purpose reservoir, the Longtan Reservoir, China. The rainfall seasonality index ( $S I_{P}$ ) and the runoff seasonality index ( $S I_{R}$ ) are used to evaluate the feasibility and rationality of the flood period staging. The fractal method is then used to segment the flood season. Finally, the design flood is carried out to optimize the staged FLWLs. The results show that the $S I$ is an effective indicator for judging the feasibility and verifying the rationality of flood segmentation. The flood period can be segmented into the pre-flood season (12 April–29 May), the main flood season (30 May–3 September), and the post-flood season (4 September–9 November). The FLWLs in the main flood and the post-flood season can be raised by 2.05 m and 3.45 m, and the effective reservoir capacity is increased by 5.810 billion m³ and 6.337 billion m³, according to the results of the flood season division.

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Titel:

Flood Season Staging and Adjustment of Limited Water Level for a Multi-Purpose Reservoir

Beteiligte:

Chongxun Mo (Autor:in) / Juan Deng (Autor:in) / Xingbi Lei (Autor:in) / Yuli Ruan (Autor:in) / Shufeng Lai (Autor:in) / Guikai Sun (Autor:in) / Zhenxiang Xing (Autor:in)

Erschienen in:

Water, Vol 14, Iss 5, p 775 (2022)

Erscheinungsdatum:

2022

ISSN:

DOI:

https://doi.org/10.3390/w14050775

Medientyp:

Aufsatz (Zeitschrift)

Format:

Elektronische Ressource

Sprache:

Unbekannt

Schlagwörter:

seasonality index , fractal method , flood period segmentation , FLWL , Longtan Reservoir , Hydraulic engineering , TC1-978 , Water supply for domestic and industrial purposes , TD201-500

Metadata by DOAJ is licensed under CC BY-SA 1.0

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