Using an unmanned aerial system to monitor and assess irrigation water channels susceptible to sediment deposition

The irrigation channel of the Qishan River is among the most crucial agricultural water resource facilities in Qishan District, Kaohsiung City, Taiwan. The channel was blocked by debris due to flood events caused by Typhoon Morakot in 2009. This study analyzed images captured by an unmanned aerial s...

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Veröffentlicht in:Environmental monitoring and assessment 2021-08, Vol.193 (8), p.506-506, Article 506
Hauptverfasser: Leu, Wen-Hao, Chen, Ho-Wen, Chen, Chien-Yuan
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Chen, Ho-Wen
Chen, Chien-Yuan
description The irrigation channel of the Qishan River is among the most crucial agricultural water resource facilities in Qishan District, Kaohsiung City, Taiwan. The channel was blocked by debris due to flood events caused by Typhoon Morakot in 2009. This study analyzed images captured by an unmanned aerial system to identify channel areas susceptible to sediment deposition and propose measures for reducing the effects of natural hazards on irrigation water resources. The analysis results revealed that the channel was located downstream of the Qishan River; however, debris flows, riverbank landslides, and natural dam breaches deposited sediment in the downstream section, preventing the flow of water. Furthermore, the sediment and driftwood blocked the channel. The channel was also blocked due to a hyperconcentrated flow. Sediment deposition areas and volumes were estimated. On the basis of these results, we suggest that the damaged riverbed groundsills and river tributary banks be restored to inhibit erosion. In addition, subsurface water collection and transfer structures should be constructed to maintain the flow of water during the dry season. The study findings are expected to increase the efficiency of agricultural irrigation water management and prevent natural hazards from affecting water resources.
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The channel was blocked by debris due to flood events caused by Typhoon Morakot in 2009. This study analyzed images captured by an unmanned aerial system to identify channel areas susceptible to sediment deposition and propose measures for reducing the effects of natural hazards on irrigation water resources. The analysis results revealed that the channel was located downstream of the Qishan River; however, debris flows, riverbank landslides, and natural dam breaches deposited sediment in the downstream section, preventing the flow of water. Furthermore, the sediment and driftwood blocked the channel. The channel was also blocked due to a hyperconcentrated flow. Sediment deposition areas and volumes were estimated. On the basis of these results, we suggest that the damaged riverbed groundsills and river tributary banks be restored to inhibit erosion. 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subjects Agricultural Irrigation
Agricultural resources
Aquaporins
Atmospheric Protection/Air Quality Control/Air Pollution
Bank erosion
Channels
Cities
Dam breaching
Debris flow
Deposition
Downstream
Downstream effects
Driftwood
Dry season
Earth and Environmental Science
Ecology
Ecotoxicology
Environment
Environmental Management
Environmental Monitoring
Environmental science
Geologic Sediments
Hazards
Hurricanes
Irrigation
Irrigation efficiency
Irrigation systems
Irrigation water
Irrigation water management
Landslides
Monitoring/Environmental Analysis
River banks
River beds
River channels
Riverbanks
Riverbeds
Rivers
Sediment
Sedimentation & deposition
Sediments
Subsurface water
Taiwan
Tributaries
Typhoons
Unmanned aerial vehicles
Water
Water management
Water resources
title Using an unmanned aerial system to monitor and assess irrigation water channels susceptible to sediment deposition
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