基于MIKE模型的叶尔羌河洪水风险要素计算

为评估叶尔羌河流域洪水风险,以叶尔羌河喀群渠首至中游渠首之间的区域为例,构建了集MIKE11、MIKE21、MIKE FLOOD为一体的洪水淹没演算模型,计算了不同量级洪水下的淹没范围、水深、流速等风险要素,并在此基础上编制了研究区的洪水风险图。计算结果表明,叶尔羌河洪水风险较高,5年一遇洪水就能引起叶尔羌河部分河段洪水漫溢,造成淹没损失。编制的洪水风险图可为研究区的防洪减灾、洪水风险控制提供决策参考。

Calculation of Flood Risk Factors of Yarkant River Based on MIKE Model

In order to evaluate flood risk in the Yarkant River Basin, the region between Kaqun canal head and middle reaches canal head in the Yarkant River was taken as an example, flood inundation routing model for integrating MIKE FLOOD with MIKE11 and MIKE21 was established to calculate flood risk factors under different magnitude, such as inundation areas, flooding depth and flow velocity. And then flood risk map for the study area was compiled. The results show that the flood risk of Yarkant River is high, and flood for 5 year return periods can cause overflowing and inundation losses in part reaches of Yarkant River. Therefore, the prepared flood risk map can provide decision making reference for flood prevention and disaster mitigation