Rainwater Harvesting

Rainwater Harvesting & Runoff Management

GeoExperts expands its services to include fully integrated projects that combine rainwater harvesting, surface runoff management, and sustainable groundwater recharge—
aiming to maximize the beneficial use of stormwater for aquifer recharge and agriculture.

Rainwater harvesting forms a key element of water security strategies in mountainous and plain regions.

The company offers practical solutions for rainfall capture and aquifer recharge.

5.1 Work Methodology

  1. Analysis of historical rainfall records using GPM, TRMM, and ERA5 datasets.
  2. Surface runoff estimation using SCS-CN and Rational methods.
  3. Slope, soil, and land cover analysis via GIS to identify optimal locations for rainwater and flood-harvesting structures.
  4. Long-term hydro-meteorological analysis (up to 50 years) using GPM and ERA5.
  5. GPM/TRMM data analysis and SCS-CN calculation for catchment response.
  6. Multi-criteria GIS analysis (MCDA) to identify highest-benefit zones.

5.2 Technical Deliverables

  • Maps of rainwater harvesting sites and recharge zones.
  • Preliminary designs for rainwater harvesting structures.
  • Design of hydraulic structures such as ponds, small dams, stone check dams, and water traps.
  • Economic and environmental feasibility assessments.
  • Annual estimations of harvestable water volumes.
  • GIS-based location selection for rainwater and floodwater harvesting ponds.
  • Design of harvesting structures according to FAO and WMO guidelines.
  • Long-term performance modeling of small dams and ponds using SWMM and HEC-HMS.