开发洪水风险地图的多标准分析:一种对巴西城市应用的层次方法
Sharon Kelly de Melo1, Aleska Kaufmann Almeida1, Isabel Kaufmann de Almeida2
1Faculty of Engineering, Architecture and Urbanism and Geography, Federal University of Mato Grosso do Sul, Campo Grande, MS, 79070-900, Brazil.
概括
这项研究绘制了大西洋森林生物群中的洪水风险图,确定了强烈的降雨量,特定的地形和城市附近作为主要洪水指标. 这些发现有助于减轻洪水损害.
科学领域:
- 环境科学 环境科学
- 地质科学 地质科学
- 水文学的水文学
背景情况:
- 洪水对全球社会经济和环境造成重大损害,需要对影响因素进行研究.
- 了解降雨,地形和人类活动等因素对于洪水风险绘制和减轻至关重要.
- 大西洋森林生物群中经常发生的洪水灾害凸显了本地化风险评估的必要性.
研究的目的:
- 在大西洋森林生物群的三个不同区域内绘制和分析易受洪水影响的地区.
- 确定导致这些地区经常发生洪水事件的关键因素.
- 为制定有效的洪水损害减轻战略提供基础.
主要方法:
- 使用分析层次过程 (AHP) 进行了多标准分析.
- 编制了一个地理空间数据库,包括海拔,斜率,排水距离,土壤特性,降水,浮标和土地使用/土地覆盖等层.
- 为研究区域生成洪水风险地图.
主要成果:
- 连续几天的强烈降雨被确定为主要影响因素.
- 特殊的地形特征,包括低斜率的运河边缘和平坦的区域,加上接近水体,增加了洪水风险.
- 主要河岸附近的建筑密集的地区与洪水事件密切相关.
结论:
- 强烈降水,特定的地形和靠近水道的结合显著表明洪水发生.
- 开发的洪水风险地图为大西洋森林的土地利用规划和灾害管理提供了宝贵的见解.
- 这项研究有助于更好地了解脆弱生态系统的洪水动态和缓解策略.
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