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| DOI：10.13522/j.cnki.ggps.2019223 |
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| Using GIS Grid Dataset to Simulate and Identify Flooding Risks in Irrigation Areas in Yarkant in Xinjiang |
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PENG Liang, MA Yunfei, WEI Renjuan, HE Ying, MU Zhenxia, LI Xiaoqing, LIU Chenghong
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1.College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China;2.Xinjiang Laboratory of Lake Environment & Resources in Arid Zone , Urumqi 830054, China; 3. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China; 4. Sichuan Water Conservancy Vocational and Technical College, Chengdu 611230, China; 5. Xinjiang Kashgar Water Resources Bureau, Kashi 844000, China
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| Abstract: |
| 【Objective】In order to strengthen the flood control planning and management of Yarkant River irrigation area, the paper carried out the flood inundation risk simulation study.【Method】The analysis was based on flood events measured in 1959—2015 from the region between the Kaqun canal head and Eryketam. The merging GRID raster file was generated from DEM, and a flooding inundation routing model - Flood-Area - was developed to calculate flooding risk factors such as inundation area, flood depth and flow rate, under different scenarios.【Result】The flood inundation area was limited to the vicinity of the flooding plain. The 20-year return of flooding risk was high, which could cause overflow and inundation losses in parts of the downstream reaches of the Kaqun gauge with the inundation area distributed mainly in the lowland of the irrigation areas along the river. The frequency of 5-year return of flooding risk and its associated inundation area were both less than those of the 20-year return. The 5-year return of flooding risk of the Yarkant River was low and it dose not result in loss in irrigation areas and residential areas.【Conclusion】The Flood-Area model was able identify flooding risks and calculate inundation areas duo to high and moderate flooding. Flooding-control projects should focus on sections of the river in the plain areas comprising of Shache County, Makit county and Bachu County. |
| Key words: Yarkant River; model; GIS Grid Dataset; flood scenarios; flood inundation area |
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