The consequences and policy implications of urban encroachment into flood-risk areas: the case of Ibadan
The consequences and policy implications of urban encroachment into flood-risk areas: the case of Ibadan
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DOI：
10.1080/17477891.2016.1211505
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发表时间：
2017-01
期刊：
影响因子：
--
通讯作者：
B. Wahab;Olusegun Falola
中科院分区：
文献类型：
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作者：
B. Wahab;Olusegun Falola
摘要城市对泛滥平原的侵占加剧了洪涝灾害，因为泛滥平原缓解洪涝灾害的能力降低，从而带来更多的定居点和面临洪灾风险的人。这项研究调查了城市侵占伊巴丹洪水风险地区的后果和政策影响。这项以调查为基础的研究依赖于一手和二手数据，采用多阶段抽样程序，在2011年选择了15%的受洪水影响的建筑物，并向402户家庭发出了结构化问卷。这项研究表明，关于城市泛滥平原的责任、规章和控制的体制安排是支离破碎和非参与性的。在所有受影响的建筑中，至少有62%的建筑侵占了法定的河流倒退。丢失/损坏的家庭财产包括家用物品(75%)、家畜和宠物(60%)、工作仪器/机器(31%)、家用水源(34%)和车辆(29%)。城市社区和城市周边社区之间在以下方面有很强的直接相关性：(1)损坏/丢失财产的数量和(2)遭受与健康有关的挑战的家庭数量。建议将洪水管理活动的整体协调委托给一个机构，由该机构负责与城市规划和洪水风险管理有关的法律、技术、行政和财务事务。
ABSTRACT Urban encroachment on floodplains has exacerbated flood disasters owing to the reduction in the floodplain’s capacity to mitigate flooding, thereby bringing more settlements and people at flood risk. This study examined the consequences and policy implications of urban encroachment into Ibadan’s flood-risk areas. The survey-based study relied on primary and secondary data, with multistage sampling procedures selecting 15% of the flood-affected buildings in 2011, from which a structured questionnaire was administered to 402 households. The study revealed that the institutional arrangements with respect to responsibilities, regulations and control of urban floodplains were fragmented and non-participatory. At least 62% of all the affected buildings encroached into the statutory setbacks to rivers. Household property lost/damaged included domestic goods (75%), domestic animals and pets (60%), working instruments/machines (31%), the source of domestic water (34%) and vehicles (29%). Strong direct correlations were found between the urban and peri-urban communities in (1) the number of damaged/lost property and (2) the number of households that suffered health-related challenges. The paper recommends that the overall co-ordination of flood management activities be entrusted to an institution that can assume responsibility for legal, technical, administrative and financial matters related to urban planning and flood-risk management.