DSD-INT 2022 Flood early warning system in the Ziz basin, Morocco - Souadi
1. Flood early warning system in the Ziz basin, Morocco,
based on the Delft-FEWS Platform and the Delft3D FM Suite 1D2D
Hydraulic and meteorological engineering company
Société de Prestations Hydrauliques et Météorologiques
Delft3D User Days 2022
2. Presentation of Ziz basin
Area: 14000 Km²
Average precipitation: 150 mm
13 vulnerable areas
2
8. Hydrological component of the platform
8
• Elaboration of the hydrological model using HEC-HMS
• Transformation of rainfall forecasts to flow hydrograph
• Calibration of HEC-HMS parameters (Curve number, initial abstraction, time
of concentration …) using observed events
• Integration of HEC-HMS models in Delft-FEWS
• Identification of canopy, surface, loss, transform and baseflow methods
11. Hydraulic component of the platform
11
• Elaboration of the hydraulic model using Delft3D FM Suite 1D2D
(version 0.9.9.52575)
• Integration of Delft3D FM models in Delft-FEWS
• Edition of the model inputs: Bed level, grid, upstream & downstream
boundaries, flow hydrograph, water level, manning coefficient, structures
(bridge, gate, weir…), simulation parameters…
• Elaboration of two-dimensional models
12. Hydraulic component of the platform
12
Upstream boundary
Fixed weir
Observation
point
Observation cross
section
Bridge
Refined grid 5 m × 5 m
Downstream boundary
Grid 10 m × 10 m
22. Recommendations
22
• Possibility of integration of the bridge deck in the bridge structure
Bridge pillar
• Possibility of importing a high resolution digital terrain model in Delft3D FM
• Possibility of improving the performance of the model in order to simulate
fluently large areas with a small cell size of the grid