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城市浸水风险的空间重叠效应和土地利用价值
1Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China.
The Science of the total environment
|July 5, 2024
概括
城市地区面临着严重的浸水风险,特别是那些土地价值高的地区. 这项研究引入了一种新方法,可以精确识别高风险区域,改善城市洪水灾害管理和救援效率.
科学领域:
- 环境科学 环境科学
- 城市规划 城市规划
- 地理信息系统 (GIS) 是指地理信息系统.
背景情况:
- 城市淹水是对生命和财产的全球性威胁.
- 现有的研究往往忽视了城市价值的空间异质性和淹水风险.
- 有效识别高风险地区对于灾害管理至关重要.
研究的目的:
- 开发一种新的方法来识别受城市积水和高土地价值影响的关键地区.
- 分析城市土地价值与水淹没风险之间的空间重叠效应.
- 提高城市洪水灾害管理和救援行动的精度.
主要方法:
- 城市价值评估的值权衡方法 (EM).
- 主要组件分析 (PCA) 用于水淹没风险和关键区域的识别.
- 双变局部莫兰的I (DC) 用于全面评估和划定关键区域 (BH).
主要成果:
- 浸水风险受到水系统的邻近,人口密度和降雨量的影响.
- 城市价值和水淹没风险之间存在正相关性 (全球莫兰的I=0.536).
- 与以前的方法相比,DC方法在识别关键区域 (BH) 中获得了更高的精度,将识别区域减少了高达25.50%.
结论:
- 开发的方法提供了一个更精确的方法来识别关键的淹水灾害地区.
- 更好地识别关键区域显著提高了救援资源的可访问性,在百年降雨情景下,在5分钟内达到63%.
- 这项研究为提高城市救援效率和精确洪水灾害管理提供了有价值的工具.
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