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在厄瓜多尔北基托的城市化场景的社区范围的斜坡稳定性评估
R Hen-Jones1,2, C Zapata1,3,4, E Jiménez3
1University of Bristol, Bristol, UK.
概括
在基多的城市扩张.
科学领域:
- 地质科学 地质科学
- 城市规划 城市规划
- 环境科学 环境科学
背景情况:
- 基托城市的快速增长使得人口集中在的斜坡上的非正式定居点,容易发生山体滑坡.
- 这座城市面临着多种危险的环境,降雨加剧了对生活和基础设施的山体滑坡风险.
- 评估和减轻山体滑坡危险是复杂的,因为巨大的地区,复杂的城市斜坡,和有限的数据.
研究的目的:
- 开发北基托城市斜坡的概念模型,以评估山体滑坡危险.
- 调查城市化情景和降雨对斜坡稳定的影响.
- 确定引发城市环境滑坡的关键因素和值.
主要方法:
- 开发了斜坡几何学,土壤特性和城市特征的概念模型.
- 使用基于物理的联合水文和稳定模型 (CHASM) 进行模拟.
- 使用随机运行来分析成千上万的斜率输入因子组合,并进行区域灵敏度分析.
主要成果:
- 确定斜坡砍伐是小规模城市滑坡的主要驱动因素.
- 确定了降雨强度的值,用于引发山体滑坡.
- 发现了山体滑坡特征与地层厚度与有效表面凝聚力的比率之间存在强烈的相关性.
结论:
- 对于现有的非正式社区,建议重新植被.
- 保护现有的植被和精心设计的斜坡对于新的定居点至关重要.
- 调查结果支持针对性的缓解策略,以减少基多的城市山体滑坡风险.
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