Managed Aquifer Recharge (MAR) is a nature-based solution (NbS) that uses surface water to replenish aquifers, enhancing water availability and providing environmental benefits.

In Southeast Asia, where challenges like seasonal rainfall variability, groundwater overuse, saltwater intrusion, and water quality issues are common, MAR offers a sustainable approach. By storing water underground, MAR minimizes evaporation losses and ensures reliable water supplies, especially in drought-prone regions.

MAR restores depleted aquifers, prevents land subsidence, and mitigates saltwater intrusion. It also improves water quality through methods like bank filtration and surface infiltration. Ecologically, MAR supports aquatic ecosystems and preserves natural hydrological cycles.

Techniques include infiltration ponds, recharge dams, and runoff harvesting to enhance water infiltration and manage stormwater. For areas with low-permeability soils, direct injection via wells or boreholes replenishes aquifers. MAR reduces reliance on surface reservoirs, cutting infrastructure costs while securing water for agriculture, industry, and households.