The contribution of fine-grained exposure to flood risk assessment along the Niger River

The dataset contains information used for flood risk assessment (FRA) along 58 km of the Niger River upstream of the city of Niamey. We hypothesised that a more detailed definition of assets exposed to flooding than that provided by standard flood risk assessments (FRA) developed in low- and medium-income economies would facilitate risk management. The dataset comprises five shapefiles, two data tables, and two tables of information related to the reference FRAs in low- and middle-income economies, published between 2016 and 2025.
The shape files contain: (i) Crops, (ii) Buildings, (iii) Guinean floodplain (W) with 2, 5, 10, 30, 100 years of return period, and (iv) Local floodplain (S) with 2, 5, 10, 30, 100 years of return period.
The data tables concern: (i) fifty-seven flood-prone settlements according to the return period and floodable buildings (number and gross floor area) , and (ii) flood risk in monetary terms (EUR) according to the probability of occurrence.
The information tables concern: (i) forty river FRAs in low- to middle-income economies, 2016-2025, and (ii) risk mapping implications based on forty river FRAs in low- to middle-income economies, 2016-2025.

本数据集包含用于尼日尔河尼亚美市上游58公里河段洪水风险评估（Flood Risk Assessment, FRA）的相关信息。本研究提出假设：相较于中低收入经济体中标准洪水风险评估所采用的暴露资产定义，更精细化的洪水暴露资产界定将助力提升风险管理效能。本数据集包含5个形状文件（Shapefile）、2个数据表，以及2份与2016年至2025年间发布的中低收入经济体标准洪水风险评估相关的信息表。
上述形状文件涵盖：(i) 作物分布图层；(ii) 建筑分布图层；(iii) 几内亚洪泛平原（W）图层，包含2年、5年、10年、30年、100年一遇洪水重现期情景；(iv) 本地洪泛平原（S）图层，同样包含2年、5年、10年、30年、100年一遇洪水重现期情景。
数据表包含两类内容：(i) 基于洪水重现期与可淹没建筑数量及总建筑面积统计的57个易涝定居点信息；(ii) 以欧元（EUR）为计价单位的洪水风险货币价值数据，该数据基于洪水发生概率计算得到。
信息表包含两类内容：(i) 2016年至2025年间发布的40份中低收入经济体河流洪水风险评估报告相关信息；(ii) 基于上述40份中低收入经济体河流洪水风险评估报告得出的风险制图应用启示。