全球变暖背景下不同暴雨对平原湖区涝灾影响模拟研究

Modeling the influences of various rainstorms on the waterlogging in lake regions under the background of global warming

以洞庭湖腹地大通湖地区为例,基于平面二维水流数学模型,采用有限体积法和非结构网格,模拟研究了全球变暖背景下不同暴雨对平原湖区涝灾的影响,得出了不同强度暴雨下区域内涝灾分布情况及致涝率,并定量计算分析了暴雨强度的增加对内涝造成的不利影响,研究结果可为涝灾预测与评估等提供技术支持。

Based on the two-dimensional flow model and by applying the finite volume method and unstructured mesh,the waterlogging and drainage of the Datong Lake Region,heartland of the Dongting Lake Plain under various rainstorms were studied.The spatial distribution of waterlogging in the Datong Lake Region and the ratio of waterlogging were obtained.The negative influences of the increased intensity of the rainstorms on the waterlogging were analyzed quantitatively.The results of the research can provide technological support to the waterlogging forecasting and assessment.