城镇化背景下中小流域洪水风险研究——以厦门市东西溪流域为例
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国家自然科学基金项目"流域水系结构与连通变化对洪涝与水环境影响研究"(41371046;41371044);江苏省自然科学基金项目(BK20131276);江苏省水利科技基金重点项目(2015003);水利部水利公益专项(201201072;201501041)


Flood Risk in Medium and Small Basin During Urbanization——A Case Study on East and West Streams Watershed in Xiamen City
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    摘要:

    [目的] 以厦门市东西溪流域为例,对城镇化背景下中小流域洪水风险进行评价和研究,为该区有效实施防洪减灾措施提供参考依据。[方法] 以GIS空间分析作支持,将暴雨洪水频率分析与平原区洪水淹没模拟计算相结合,基于MIKE21平面二维水动力学模型进行洪水风险分析,对研究区洪水风险程度以及淹没状况进行模拟计算。[结果] 绘制出厦门市东西溪流域动态洪水风险图,并根据洪水淹没区内的土地利用等因素的变化等实际情况,调整不同频率洪水淹没范围,实现东西溪流域洪水风险图的实时动态更新。[结论] 研究区洪灾风险主要分布在东溪、西溪、汀溪等主干流河段,总体上呈现随着洪水重现期增大,灾害风险由上游向下游,由近岸向远岸不断扩大的趋势。

    Abstract:

    [Objective] The flood risk evaluation in medium and small basin caused by urbanization were carried out in East and West Stream watershed in Xiamen City in order to provide some references for the flood control and disaster mitigation in study watershed. [Methods] Based on the spatial analysis of GIS and the two-dimensional hydrodynamic model named MIKE21, the flood risk analysis and submerged conditions were simulated by the combined rainstorm flood frequency analysis and plain flood submerging model. [Results] The dynamic flood hazard map of the East and West streams watershed in Xiamen City was created, together with the current land use change condition, the instant flood hazard map is able to establish according to the flood frequency. [Conclusion] The flood risk in the study area was mainly distributed in the main stream of the East stream, West stream and Ting stream watershed. With the increase of the flood recurrence period, the flood hazard tends to increase from upstream to downstream and from near-shore to off-shore.

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项捷,许有鹏,杨洁,李广,王跃峰,邓晓军.城镇化背景下中小流域洪水风险研究——以厦门市东西溪流域为例[J].水土保持通报,2016,36(2):283-287

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  • 收稿日期:2015-03-18
  • 最后修改日期:2015-06-01
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  • 在线发布日期: 2016-05-06
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