Noble Institute For Premier Studies & Technologies (NIPSTec) Limited


An ISO 9001:2008 Certified Company, Regd.With Ministry of Corporate Affairs,Government of India - CIN: U72200DL2001PLC111161

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Rain Water Harvesting & Artificial Recharge :
  • Water is nectar of life and life cannot sustain without it. Ever increasing demands of water for domestic, irrigation as well as industrial sectors have created water crisis worldwide.
  • Ground water is the only dependable source of water. Due to rapid urbanization infiltration of rain water into the sub – soil has decreased drastically and recharging of ground water has diminished. Over – exploitation of ground water resources has resulted in declined in water levels in most part of the country. Inferior quality of groundwater with high salinity, fluoride and nitrate contents further limits the availability of fresh water assets. Therefore, it has become essential to adopt Rain Water Harvesting, Artificial Recharge, Storage & Water Shed Management.

Attributes of Ground Water :
  • There is more ground water than surface water.
  • Ground water is less expensive and economic resource.
  • Ground water is sustainable and reliable source of water supply.
  • Ground water is relatively less vulnerable to pollution.
  • Ground water is free of pathogenic organism.
  • Ground water is usually of high bacteriological purity.
  • There is no conveyance losses in ground water based supplies.
  • Ground water resources can be instantly developed and used.
  • Ground water has no turbidity and colour.
  • Ground water has low vulnerability to drought.
  • Ground water is usually universally available.

Advantages :
  • Enhance availability of ground water at specific place and time.
  • Augment the ground water storage and control decline of water levels.
  • Improves the quality of ground water through dilution.
  • Removes bacteriological and other impurities from sewage and waste water.
  • Save energy required for lifting the ground water and reduce power consumption of 0.4KWH.
  • Avoid flooding of roads.
  • Reduces the runoff which is chocking the storm drains.
  • Reduces the ground water pollution.
  • Meet ever increasing demand for water in the urban areas.
  • Reduces the Soil erosion.
  • To arrest sea water ingress.
  • The structures required for harvesting the rainwater are simple, economical and eco-friendly.

How To Do It :
Roof top rainwater can be stored and recharged to groundwater reservoir through :
  • Abandoned Dug well
  • Abandoned / running hand pump
  • Recharge pit
  • Recharge trench
  • Gravity head recharge well
  • Recharge shaft

Technical Designs and Design Considerations of Artificial Recharge to Ground Water Structures :
Rain water harvesting structures are site specific and the most important considerations in recommending rain water harvesting structures are :
  • Hydrogeology aquifer parameters, depth to water levels and chemical quality of ground water.
  • Land use pattern of runoff generating area and availability of space for construction of recharge structure and
  • Hydro meteorological factors like quantity of rainfall, pattern and intensity of rainfall.
Recharge through Dug wells :
  • Dug wells which are abandoned as well as dried up can be utilized for recharging the aquifers. Storm water can be diverted to the dug wells through a desiltation chamber as shown in the adjacent figure or through a filtration chamber consisting of sand/Gravel/ Boulders if the expected silt load is more in the storm water.
Recharge Trenches :
  • Lateral Trench with one or more than one tube wells can be constructed in the individual houses, group housing societies and large colonies based on available run - off. General width of these trenches varies from 1.5 to 3.0 m and length is about 4 to 12 m depending upon the run off generated through hourly intensity of rainfall.
Storage System : Another method of Rain water Harvesting is the storage of Rain water above the ground, as much as we can and using the water meeting daily needs of individuals. We may adopt the conventional filtrations techniques or advance modern filters with following advantages :
  • Works on cohesive force
  • No Power is required
  • Self Cleaning
  • Debris leaves and dirt Particles are removed continuously and flushed out
  • Simple Installation
  • Fully enclosed and wall mounting
  • The filter capacity remain unchanged even with the variations of intensity of rainfall
  • No consumables required
These filters are available in variety and selection of scheme is based on various factors like:
  • Rainfall in the AREA
  • Rooftop Area of the Premises
  • Rainfall Intensity
  • Area Available for Storage
  • Conduction &
  • Cost