Data for pluvial flood risk assessment in rural settlements of the Dosso Region, Niger

This dataset contains information for a participatory pluvial flood risk assessment in four rural settlements of the Dosso Region, Niger.
Based on the ISO 31010 standard for risk management-risk assessment, hydraulic modelling was used to ascertain flood-prone zones for each settlement in order to identify the assets in flood-prone zones. Risk reduction measures were then proposed. Risk evaluation (residual risk and benefit-cost analyses) completes the risk assessment.

This dataset contains 9 tables and 6 figures:
Table 1 - Daily rainfall for each return period considered and for each settlement;
Table 2 - Pluviometrical data series for each settlement and the probability distribution functions used to determine the return periods;
Table 3 - Average runoff coefficient of each watershed at different return periods and in the two scenarios (before treatment, after treatment);
Table 4 - Soil roughness for each land cover as defined by the Manning coefficient;
Table 5 - Assets exposed to flood risk according to very probable, probable, and improbable flood zone (as a future building expansion scenario);
Table 6 - Cost comparison between substitution of assets and risk reduction measures;
Table 7 - Monetary values for pluvial flood risk in RP3 and RP20 baseline conditions (before treatment) for each settlement;
Table 8 - Monetary values of risk and residual risk in RP3 and RP20 scenarios for each settlement;
Table 9 - Damage reduction benefits and risk treatment costs for each settlement;
Figure 1 - Flowchart of the adopted method;
Figure 2 - Regional framework of Dosso with the four settlements location;
Figure 3 - Forms and parameters used in the hydraulic model;
Figure 4 - Exposed assets in RP3 and RP20 flood-prone zones for the settlement of Gagila;
Figure 5 - Pictograph of proposed risk reduction measures;
Figure 6 - Risk reduction measures localisation in the upstream catchment of Tessa.