Applicability of a conceptual tool in quantifying the effectiveness of Nature-Based Solutions in tropical urban flood mitigation

Applicability of a conceptual tool in quantifying the effectiveness of Nature-Based Solutions in tropical urban flood mitigation: A case study in Paramaribo, Suriname

Keesmaat, Perrin (TU Delft Civil Engineering & Geosciences)

Uijlenhoet, R. (mentor)
Langeveld, J.G. (graduation committee)
Heijnert, Karel (graduation committee)
Prinsen, Geert (graduation committee)

Delft University of Technology

Water Management | Hydrology

2023-05-01

This thesis aims to assess the applicability of the CRCTool for evaluating the effectiveness of NBS for mitigating tropical urban floods in the city center of Paramaribo. Assumptions related to urban flood mitigation were tested, a sensitivity analysis for the most sensitive parameters was performed, and the hydrological behaviour of groundwater processes, evapotranspiration, and percolation were critically assessed. In addition, the model outcomes were compared to a hydrodynamic model, developed in D-HYDRO, to determine the importance of spatial effects such as flow routing and elevation. It was found that the current state of the CRCTool restricts its applicability to areas with low rainfall and runoff volumes. The continuous modelling capabilities are limited due to the way hydrological fluxes are implemented. Minor model adjustments can be made to make the tool more suitable for areas with larger rainfall volumes. This research recommends implementing these adjustments and thoroughly testing the tool's performance. Additionally, to minimize the impact of flow routing and elevation, it is advised to test the tool on smaller areas where the hydrological conditions are more clearly defined.

http://resolver.tudelft.nl/uuid:ade6c65f-163a-4fe5-be81-11b0e3e9f0c4

Student theses

master thesis

© 2023 Perrin Keesmaat