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评估城市地区受气候变化引发洪水影响的风险元素的暴露情况、应对措施和适应策略。以坦桑尼亚达累斯萨拉姆市的詹瓜尼区为例。

Assessment of exposure, coping and adaptation strategies for elements at risk to climate change-induced flooding in urban areas. The case of Jangwani Ward in Dar es Salaam City, Tanzania.

作者信息

Nyashilu Issa Musa, Kiunsi Robert Benjamin, Kyessi Alphonce Gabriel

机构信息

Vice President's Office, Government City, Mtumba Area, P.O. Box 2502, Dodoma, Tanzania.

Associate Professor, Department of Environmental Engineering and Technology, Ardhi University, P.O. Box 35176, Dar es Salaam, Tanzania.

出版信息

Heliyon. 2023 Mar 31;9(4):e15000. doi: 10.1016/j.heliyon.2023.e15000. eCollection 2023 Apr.

Abstract

Urban areas are the engines of socioeconomic growth and the homes of billions of people around the globe. In a changing climate, urban areas are inexorably from vulnerability to climate hazards including flooding which deters their social, economic, and environmental sustainability. The main objective of this paper was to explore exposure to elements at risk due to climate change-induced flooding in urban areas. In addition, the paper analyses the coping and adaptation strategies practiced at the community and national levels and recommends appropriate policy measures for enhanced climate resilience in urban areas. The study adopted purposeful sampling in which n = 95 households were selected for the study. Data collection methods involved household interviews with structured questionnaires, focused group discussions, documentary reviews, transect walks, surveys, and observations. Data analysis was done with a statistical package for social sciences. The results revealed that the elements at risk of exposure to climate change-induced flooding in the study area were physical infrastructures, socio-economic activities, livelihoods, and ecosystems. The study recommends enhancing resilience of elements at risk to climate change-induced flooding at national and local levels in urban areas. This is through promoting flood policies, strategies, laws, planning and management measures; enhance non-structural actions including flood forecasting, mapping, emergency evacuation plans and land use zoning and structural measures namely dams, dikes, storm surge barriers for adaptation to urban flooding.

摘要

城市地区是社会经济增长的引擎,也是全球数十亿人的家园。在气候变化的背景下,城市地区不可避免地面临着包括洪水在内的气候灾害风险,这阻碍了它们的社会、经济和环境可持续性发展。本文的主要目的是探讨城市地区因气候变化引发的洪水而面临的风险因素。此外,本文分析了社区和国家层面实施的应对与适应策略,并建议采取适当的政策措施,以增强城市地区的气候适应能力。该研究采用了目的抽样法,选取了n = 95户家庭作为研究对象。数据收集方法包括使用结构化问卷进行入户访谈、焦点小组讨论、文献综述、横断面调查、问卷调查和观察。数据分析使用了社会科学统计软件包。结果显示,研究区域内面临气候变化引发洪水风险的因素包括物理基础设施、社会经济活动、生计和生态系统。该研究建议在城市地区的国家和地方层面增强面临气候变化引发洪水风险的因素的适应能力。这可以通过推行洪水政策、战略、法律、规划和管理措施来实现;加强非结构性行动,包括洪水预报、绘图、紧急疏散计划和土地利用分区,以及结构性措施,即修建大坝、堤坝、风暴潮屏障,以适应城市洪水。

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