OECS Flood Management and Slope Stabilization Interventions
|
CLIENT: Organization of Eastern Caribbean States Commission (OECS) St. Lucia, W.I. LOCATION: Antigua and Barbuda, W.I. START DATE: February 2016 COMPLETION DATE: December 2016 |
Alpha received an award from the OECS for the provision of technical assistance for the flood management and slope stabilization interventions in Antigua and Barbuda (Cashew Hills); a Global Climate Change Alliance Project on Climate Adaption and Sustainable Land Management in the Eastern Caribbean financed by the European Union.
The main scope of the contract was separated into two phases (Phase 1:-Design and Procurement and Phase 2:-Supervision of Works) and includes:
The main scope of the contract was separated into two phases (Phase 1:-Design and Procurement and Phase 2:-Supervision of Works) and includes:
- Hydrological studies; defining contributing catchments from topographical information and contour maps; defining applicable rainfall event, comparing with recent storm and recommendations using 1:25-yr recurrence interval storm for design, 1:10-yr and 1:5-yr peak discharges.
- Establishing storm water flow levels as it relates to flooding through hydrological analyses of the entire contributing catchment. Including large areas outside the Cashew Hill area in the catchment definition and determination of the C-factors as it relates to present and future landuse.
- Engineering designs for the specific watercourses defined, including drainage infrastructure, relevant watercourse crossings, lined and unlined channels where appropriate, within the project site to cater for calculated surface water runoff during high intensity flood events via a more efficient storm drainage system.
- Creation and rehabilitating of ponds and natural wetlands within the defined project site to facilitate attenuation of peak storm flows, infiltration to facilitate the treatment of contaminated surface runoff.
- Training local civil engineers in methodologies for implementing climate-resilient development, using a teaching-by-doing approach.