Demonstration of the impacts of anti-sedimentation techniques on Japanese reservoir siltation via mass data ANN analysis

Reservoirs have been installed as long-term assets to guarantee water and energy security for decades, if not centuries. However, the effect of siltation undermines reservoirs' sustainability because it significantly reduces the reservoirs' original capacity. Extreme events such as typhoon...

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Bibliographic Details
Published in:Journal of hydroinformatics 2022-03, Vol.24 (2), p.223-242
Main Authors: Landwehr, Tobias, Kantoush, Sameh Ahmed, Nohara, Daisuke, Sumi, Tetsuya, Pahl-Wostl, Claudia
Format: Article
Language:English
Subjects:
Analysis
Bottom trawling
Dredging
Drought
Energy security
Environmental monitoring
Governance
Hurricanes
Inflow
japan
Local precipitation
mass data
Network analysis
Network management systems
Neural networks
Precipitation
Reservoir sedimentation
Reservoirs
rnn
Security
Sediment
sediment management
Sedimentation
Sedimentation & deposition
Sediments
Siltation
Spilling
Sustainability
Time series
Typhoons
Water inflow
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Summary:Reservoirs have been installed as long-term assets to guarantee water and energy security for decades, if not centuries. However, the effect of siltation undermines reservoirs' sustainability because it significantly reduces the reservoirs' original capacity. Extreme events such as typhoons, floods and droughts are posited to have extreme impacts on sediment inflow and deposition in reservoirs. The same holds true for ISMTs (implemented sediment management technologies), such as dredging, spilling and bypassing. However, the large-scale analysis of their effects on reservoir sedimentation progression, recovery and development was not feasible due to data scarcity and technological restrictions. The present paper closes this information gap by conducting a GRU (gated recurrent unit) neural network analysis of 1,224 Japanese reservoirs, for which the sedimentation, local precipitation, extreme events and ISMTs were monitored between 2000 and 2017. The network reveals the beneficial impacts of dredging, spilling and bypassing. The results also demonstrate the potential of smart management and improved monitoring for sedimentation threat abatement. Thus, foresighted engineering and dedicated governance action in flood and drought scenarios can significantly strengthen the sustainable behavior of key infrastructure elements such as reservoirs.
ISSN:1464-7141
1465-1734
DOI:10.2166/hydro.2022.013