| 摘要: |
| 【目的】洪水风险分析可以为叶尔羌河灌区防洪规划与管理提供技术指导。【方法】根据近50年叶尔羌河灌区洪水事件，以叶尔羌河喀群渠首至艾力克塔木之间的区域为研究对象，应用GIS工具生成数字高程模型(DEM)栅格数据，构建了FloodArea洪水淹没模拟模型，计算了高情景和低情景两种典型历史洪水量级下的淹没范围、水深、流速等风险要素,绘制了研究区的洪水风险图。【结果】叶尔羌河洪水淹没风险区主要限于灌区河段附近，20年一遇洪水风险较高，卡群水文站以下河段多处被洪水冲毁部分河段河堤，洪水漫溢淹没区主要分布在沿河道两边灌区的地势低洼区，洪水淹没范围较大；5年一遇洪水的流程强度和洪水淹没区比20年一遇洪水有所减少，危险性等级降低，灌区以及居民点基本未受到影响。【结论】结合数字高程模型DEM和洪水过程，采用FloodArea模型模拟显示洪水淹没范围，识别高情景和低情景两种典型洪水量级下沿叶尔羌河两岸灌区的洪水风险。 |
| 关键词: 叶尔羌河；FloodArea 模型；栅格数据；洪水情景；洪水淹没 |
| DOI： |
| 分类号:TV697.2+l |
| 基金项目:国家自然科学基金项目（51569031）；“新疆干旱区湖泊环境与资源实验室”基金项目（XJDX0909-2012-02）；国家国际科技合作专项项目资助（2012DFA20520） |
|
| Dynamic Simulation and Identification of Flood Risk in Yarkant Irrigated Area Based on GIS Grid Dataset |
|
pengliang
|
|
College of Water Conservancy and Civil Engineering,,Xinjiang Agricultural University
|
| Abstract: |
| 【Objective】Flood risk analysis can provide technical guidance for flood control planning and management in Yarkant River irrigation area. 【Method】According to the flood events of Yarkant river in the past 50 years，the most flood events was taken in the region between Kaqun canal head and Eryketam along the Yarkant River as an study area. Merging GRID raster file generated from DEM，flood inundation routing model for integrating FloodArea was established to calculate flood risk factors under high and regular magnitude flood scenarios，such as inundation area，flood depth and flow velocity. And then flood risk map for the study area was compiled. 【Result】The results show that The Yarkant flood inundation area is mainly limited to the vicinity of the plain river section. The 20-year return flood risk of Yarkant River is high，which can cause overflowing and inundation losses in part reaches downstream of the Kaqun gauge. The inundation area is mainly distributed along the riverside and the low-lying areas of the irrigation area，with a large flood submerged area.The intensity of the 5-year return flood and the flood-inundation area are reduced compared with the 20-year return flood.Combined with DEM and the flood process. 【Conclusion】It is feasible to use the floodArea model to simulate the high and regular magnitude flood inundation area，and identify the flood risk . |
| Key words: Yarkant River； FloodArea Model； GIS Grid Dataset； flood scenarios； flood inundation area |
