This project of damping works of the macro storm drainage in the Metropolitan Area of San Salvador (AMSS) establishes the development of lagoons and SUDS as the proposal to mitigate the effects of river flooding in the urban area. Criteria are presented: economic-financial, socio-political, environmental and hydrological-hydraulic; to limit the typology and location. The joint assessment of the various approaches provides a valid approach to prioritizing actions for the development of future rainwater master plans. Based on these criteria, it was proposed to build a damping system for the macro-pluvial drainage composed of three retention reservoirs to minimize the effects of flooding in the Montserrat Arenal area, one of the basins with the greatest problems in rainwater management within the AMSS.
- A detailed rainfall study was conducted.
- Spatial distribution of precipitation by Thiessen polygons.
- Use of GIS algorithms for supervised land-use classification based on satellite imagery.
- Pseudo-distributed hydrological model in Hec-HMS for rainfall-runoff analogous to the feasibility phase.
- Consideration of climate change scenarios.
- Calibration of the models based on the levels recorded at the early warning system (SAT) loading stations.
- Two-dimensional hydraulic analysis with IBER of the flood hazard in reservoir areas and its development.
- Realization of hydraulic designs of control and unloading works, defining dimensions and reinforcements, protections in margins and bed, etc.
- Proposal of final dam designs and adoption of non-structural measures in engineering projects taking into account the need for adaptation to Climate Change.
Budget of the Works:
- Lamination dam called COLONIA LUZ: $ 18,846,034.80
- Lamination dam called EL PIRO AGUAS ABAJO: $ 13,450,817.21
- Lamination Dam named EL PIRO AGUAS ARRIBA: $ 13,313,516.84