Thematic maps of the impacts of climate change, territorial planning and capacity building

Thematic maps of the impacts of climate change, territorial planning and capacity building

Geographic scope: National

Title: Advancing hydrological cycle management with a focus on groundwater for adaptation to climate change in the Metropolitan Area of San Salvador

Countries involved: El Salvador 

Objective: The project aims to update and disseminate normative maps of hydrogeology, recharge, vulnerability and risk to water pollution, instruments that influence the strengthening of control and sustainable territorial planning. The actions will be aimed at generating new information for the increase and protection of water availability, in addition to pilot projects that allow the generation of conditions for adaptation to extreme events related to climate change.

Goals: 

  • Cartography at the metropolitan scale that considers the effects of climate change on matters of hydrogeology, recharge, vulnerability and risk of aquifer pollution that affects sustainable territorial planning;
  • Strengthened technical capacities and normative instruments of AMSS;
  • Implemented pilot projects under metropolitan governance schemes for the protection of water resources based on sustainable water cycle management strategies.

Lead entity and grant recipient entity: Consejo de Alcaldes y Oficina de Planificación del Área Metropolitana de San Salvador (Council of Mayors and Planning Office of the San Salvador Metropolitan Area)

The San Salvador Metropolitan Area is a small territory, which concentrates urbanisation and an important population that is highly exposed to climate threats, where the average annual rainfall is the indicator that allows measuring the exposure to changes in the rain cycles and their repercussions in aquifers [which range from 1600 to 2100 mm annually, concentrated in the months of May to October, with a critical range of 740 mm to 1,800 mm corresponding to average annual recharge. The future trend predicts a significant reduction in annual rainfall with 1551 and 1358 mm in RCP 2.6 and RCP 8.5 respectively, while the current average is 1,725 mm]. This accumulated annual reduction, the strong intensity of the rains in a short time due to climate change, and the waterproofing of urban lands resulting from urban sprawl, will not allow water to infiltrate properly, decreasing its availability and aggravating the risk to the population and economic activities, an aspect that will especially affect the municipalities that supply water from wells.

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