This code provides guidelines for planning, designing, and constructing artificial groundwater recharge systems using rainwater. It covers various methods like recharge pits, trenches, wells, and check dams, along with site investigation procedures and design considerations to augment groundwater resources sustainably.
Lays down the code of practice for design and implementation of artificial recharge structures using harvested rainwater to augment groundwater.
Quick Reference Values
Runoff coefficient for tiled roof0.80 - 0.95
Runoff coefficient for paved areas (bitumen/cement)0.70 - 0.85
Minimum depth of filter media in recharge pit0.5 m to 1.0 m
Minimum distance of recharge structure from building foundation10 m
Minimum distance of recharge well from septic tank10 m
Borehole diameter for recharge well150 mm to 300 mm
Key Formulas
Runoff (Q) = C * I * A (where C=Runoff Coefficient, I=Rainfall Intensity, A=Catchment Area)
Practical Notes
Always conduct a hydrogeological investigation to determine soil strata, depth to water table, and infiltration characteristics before finalizing a recharge method.
Ensure a robust multi-layer filtration mechanism is provided to prevent silt, debris, and pollutants from clogging the recharge structure and contaminating the aquifer.
Never construct recharge structures near potential sources of contamination like septic tanks, sewer lines, or industrial waste areas.