What is Rain GEO SAT?

Rain GEO SAT is a satellite-powered Water Intelligence Platform built by Amruta Integrated Water Solutions Pvt. Ltd. (Pune, India). It fuses NISAR SAR, GPM IMERG rainfall, Copernicus DEM, SoilGrids hydrogeology, ECMWF ERA5 climate reanalysis, and ISRO Bhuvan layers to design rainwater harvesting systems, groundwater recharge structures, stormwater drainage, and ESG water disclosures. Outputs are calibrated to the exact GPS coordinates of each site and produce engineering designs plus compliance reports for IGBC, LEED, GRIHA, BRSR, GRI 303, CDP, CSR, World Bank ESF, and UN SDG 6/11/13/15.

How does satellite data improve rainwater harvesting design?

Satellite rainfall (GPM IMERG) provides 0.1° / 30-minute global coverage with a 20-year record, enabling statistically robust annual exceedance probability curves. NISAR SAR confirms subsurface soil-moisture acceptance for recharge structures. Copernicus DEM at 30 m drives watershed delineation. SoilGrids supplies infiltration Ksat for SCS Curve Number runoff. Together they replace manual monsoon estimation with site-specific, auditable numbers that hold up in IGBC, LEED, and BRSR review.

Which sustainability frameworks does Rain GEO SAT support?

IGBC, LEED v4 / v4.1 Water Efficiency, GRIHA, BRSR (SEBI Principle 6), GRI 303, CDP Water Security, SASB water intensity, CSR Companies Act 2013 Schedule VII, World Bank ESF water annexes, and UN SDG 6, 11, 13, and 15. All reports are auto-generated from the same satellite-validated project inputs.

How accurate is GPM IMERG rainfall for Indian sites?

GPM IMERG Final Run provides 0.1° / 30-minute global rainfall coverage. For Indian sites, Rain GEO SAT bias-corrects IMERG against IMD AWS ground stations, achieving ±8–12% monthly accuracy. The 20-year IMERG record plus ERA5's 40-year reanalysis enables pre/post-COVID-2020 trend comparison and climate-risk projection used in BRSR and World Bank ESF disclosures.

Who built Rain GEO SAT?

Rain GEO SAT is built by Amruta Integrated Water Solutions Pvt. Ltd. (AIWS), led by MP Reddy, Managing Director & CEO. MP Reddy brings 20+ years of field experience in Hydrogeology and Hydrology, and holds IIT Bombay professional certifications in Rainwater Harvesting, Water Management, and Water Sustenance. He has led water-resource projects across five Indian states and multiple African countries. AIWS grew from the Amruta Group, founded in Hyderabad in 1990, and today operates across Hyderabad, Pune, Mumbai, and Bengaluru — with a specialist team of Hydrogeology and Hydrology professionals and 35 years of continuous water-engineering practice behind every Rain GEO SAT report.

What outputs does the Expert tier produce?

The Expert tier outputs full scientific RWH designs: multi-source rainfall fusion (NASA POWER, Open-Meteo, IMD, ERA5), DEM-based catchment delineation, NDVI vegetation indexing, hydrogeology parameters from SoilGrids + Bhuvan, CGWB-compliant recharge-pit and borewell-recharge geometry, SCS-CN runoff and peak discharge for drains, and ESG/BRSR/World Bank-ready PDF reports with satellite-validated rainfall baselines and 40-year climate trend overlays.

How do I design a rainwater harvesting system for a building in India?

To design a rainwater harvesting system in India, calculate annual yield: Catchment Area (m²) × Annual Rainfall (mm) × Runoff Coefficient (0.75–0.90 by roof type). Size the storage tank for peak demand months with first-flush diversion of 2 mm per event. For groundwater recharge, follow CGWB Master Plan (2020) — 1 m³ recharge pit per 25 m² catchment, adjusted for local SoilGrids infiltration rate. Rain GEO SAT automates this using satellite rainfall and soil data for your exact GPS coordinates.

What is the CGWA NOC requirement for groundwater extraction in India?

Under the Environment (Protection) Act 1986, any industrial project extracting groundwater above 10 m³/day requires a No Objection Certificate from the Central Ground Water Authority (CGWA NOC). The Bhu-Neer / NOCAP portal requires a hydrogeological report, rainwater harvesting and recharge plan, water balance chart, and geospatial site demarcation. Rain GEO SAT Professional and Expert modes generate satellite-evidenced CGWA NOC documentation for all six mandatory components.

Which satellite data is used for rainwater harvesting design in India?

Rain GEO SAT fuses nine satellite and climate sources: NASA/ISRO NISAR L-band SAR (soil moisture), ISRO Bhuvan (India terrain), NASA GPM IMERG (0.1°/30-min precipitation), Copernicus DEM (30 m elevation), ISRIC SoilGrids (infiltration Ksat), ECMWF ERA5 (40-year climate), Copernicus EFAS (flood alerts), Open-Meteo and Meteostat (station data), and IMD AWS (India bias-correction). All sources maintained by NASA, ISRO, ESA, ECMWF, or ISRIC — reports are defensible to IGBC, LEED, GRIHA, BRSR, and CGWA regulators.

What is water positive certification and how does a building qualify in India?

Water positive certification India means a building replenishes more water than it consumes — typically verified by GRIHA or CII-GBC under the IGBC Net Zero Water Rating. To qualify, a building must demonstrate a positive water balance: total groundwater recharge plus rainwater harvested must exceed total freshwater consumption. ISO 46001 water management system alignment and BRSR Principle 6 disclosure support the certification pathway. Rain GEO SAT Expert mode generates the satellite-verified water balance evidence required for water positive certification.

What is Zero Liquid Discharge and is it mandatory in India?

Zero Liquid Discharge (ZLD) means a facility recovers and reuses all process wastewater with no liquid effluent discharged to the environment. Under CPCB guidelines, ZLD is mandatory for textiles, distilleries, pharma, chemicals, and power generation sectors as a condition of their Consent to Operate or Environmental Clearance. ZLD systems typically recover 90–95% of wastewater for reuse, reducing freshwater dependency by 80% or more. When combined with a rainwater harvesting system and groundwater recharge design, ZLD enables full water circularity and supports water neutrality certification.

What is net zero water and how does it differ from water positive?

Net zero water means an organisation withdraws no more water from the natural environment than it returns at equivalent quality in the same watershed. Water positive certification India goes further — the organisation actively replenishes more water than it consumes, contributing to watershed restoration. Rain GEO SAT Expert mode supports both pathways by quantifying groundwater recharge volumes from satellite-verified SoilGrids infiltration and NISAR SAR soil moisture, generating the water balance evidence required for BRSR Principle 6, GRI 303, and CDP water security questionnaire disclosures.

How does rainwater harvesting support BRSR water disclosure in India?

BRSR (Business Responsibility and Sustainability Report), mandated by SEBI for India's top 1,000 listed companies, requires quantified water withdrawal, consumption, recycling, and recharge disclosures under Principle 6. A rainwater harvesting system reduces freshwater withdrawal and increases the water recycling ratio — both key BRSR metrics. Rain GEO SAT auto-generates BRSR water disclosure reports with satellite-verified rainfall baselines, catchment yield, recharge volumes, and 40-year ERA5 climate risk overlays — aligned with GRI 303 and CDP water security questionnaire schemas.

Is Rain GEO SAT free to try?

Yes. The Basic rooftop calculator is free and unlimited. Professional and Expert tiers unlock scientific reports, recharge sizing, and satellite fusion for named projects.

Does it work outside India?

Yes. GPM IMERG, NASA POWER, Open-Meteo, Meteostat, and Copernicus DEM provide global coverage. IMD and Bhuvan are used inside India for highest resolution.

How accurate is the satellite rainfall?

±8–12% monthly accuracy against IMD AWS ground stations after bias correction. The 20-year IMERG record plus ECMWF ERA5's 40-year reanalysis enables statistically robust design events.

Rain GEO SAT

Satellite Rainwater Harvesting Intelligence

Rainwater Harvesting Platform: Satellite-Verified Design, Recharge & ESG Reporting

Rain GEO SAT is a full-stack rainwater harvesting platform used by architects, hydrogeologists, ESG teams, and green-building consultants across India, Malaysia, the EU, the USA, and Africa. Every calculation is validated against satellite rainfall, DEM, soil, and NDVI layers — replacing manual monsoon estimation with auditable, GPS-precise numbers.

Explore the platform →

What the platform does end-to-end

Rain GEO SAT covers the entire rainwater harvesting workflow: site rainfall analysis, catchment delineation, first-flush and storage sizing, recharge structure design, ESG reporting, and IGBC/LEED/GRIHA water-credit documentation — all from one satellite-backed data stack.

Basic calculator — rooftop yield in under 60 seconds
Professional (Simple) — IS 15797 & CPHEEO compliant reports
Expert workspace — NISAR SAR, DEM, NDVI, CGWB recharge sizing
ESG reports — GRI 303, CDP Water, BRSR Principle 6, World Bank ESF
Auditor-grade provenance table on every PDF

Data stack behind every number

GPM IMERG (0.1° / 30-min rainfall), NASA POWER (40-yr climatology), Open-Meteo & Meteostat (station-level), IMD AWS (India ground truth), Copernicus DEM & NASADEM (30 m elevation), Bhuvan Cartosat DEM (30 m India), SoilGrids (texture + Ksat), Sentinel-2 NDVI (10 m vegetation), NISAR SAR (soil-moisture), and CGWB Dynamic Groundwater Resource Assessment.

Who uses it

Architects and MEP consultants sizing rooftop harvesting for IGBC/LEED/GRIHA credits. Hydrogeologists designing artificial recharge and CGWA-compliant borewell recharge. ESG and sustainability teams producing BRSR Principle 6, GRI 303, and CDP Water disclosures. CSR and World Bank ESF programs documenting community water offsets.

Frequently asked questions

Is Rain GEO SAT free to try?: Yes. The Basic rooftop calculator is free and unlimited. Professional and Expert tiers unlock scientific reports, recharge sizing, and satellite fusion for named projects.
Does it work outside India?: Yes. GPM IMERG, NASA POWER, Open-Meteo, Meteostat, and Copernicus DEM provide global coverage. IMD and Bhuvan are used inside India for highest resolution.
How accurate is the satellite rainfall?: ±8–12% monthly accuracy against IMD AWS ground stations after bias correction. The 20-year IMERG record plus ECMWF ERA5's 40-year reanalysis enables statistically robust design events.

Ready to apply this on your site?

Rain GEO SAT calculators use IMD, NASA POWER, Open-Meteo, and CGWB data to deliver engineer-grade rainwater harvesting and groundwater recharge designs.

Basic Calculator Professional Expert Workspace