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TGSGuide Rain WaterHarvesting

Roof Water Collection

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Rain water is a

bliss to our nature.

Every year a largevolume of

rainwater gets

wasted, which

could have been

utilized in our

day-to-day use,through proper

accumulation &

storage.

Lack of systematic

set-ups in our roofalso leads to loss

of bulk volume of

Rain Water !!

HERE IS HOW !!............

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PROBLEMS

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SOLUTION

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Incontainers

Collect

Filters

Sprinklers

Store

Household

Gardening

Use

PURPOSE

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1. Rain water collected from the roof ischannelized through the pipe that drainsit into the De-siltation Tanks.

2. The water accumulated, seeps into theFerro-Cement Tank from the De-siltationTanks.

3. Percolation Pits are one of the easiestand most effective means of harvesting

rainwater, measuring not more than60 x 60 x 60 cm. They are usually filled withpebbles or brick jelly and river sand,covered with perforated concrete slabs.

4. Water can be withdrawn via outlets like

tap attached to the De-siltation tanks orTube Wells pumping out fresh water fromthe Ferro-Cement Tanks.

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To make the collected rain water re-usable for domestic or other purposes, effectivefiltration is must. A filter has to be designed to purify the incoming water-flow fromthe roof.

Water from the roof hits a cement slab after getting discharged through a pipe outlet

As a result, it gets sprinkled on the under-lying sand bed 1st step of filtration happens The water next percolates through the below layer ofpebbles 2nd step of filtration

takes place Water then seeps in a PVC (Poly-Vinyl Chloride) pipe of 200 mm diameter, which leads to a

150 mm pipe, which in turn channels the water into Bore Well. The entire unit is 0.75 to 1.2 m high, with diameter 0.6 to 1.2 m. It is also assisted with a

air ventilator

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Rainwater harvesting systemsinstalled in Multistoried buildingscan suffice for daily water usageby the building residents :

Rainwater collected in the roofflows down the pipes runningdown the length of building, intoService Wells or Percolation Pits

Water trickles down the layer ofPebbles and Boulders designedfor underground filtration

Filtered water flows into eitherRecharge Well or the Collection

Chambers

With this setup, the building candraw water readily from itswater table in the basement,without any shortage in supply

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Roof Water Harvesting .. a quick summary Rooftop Rain Water Harvesting Capturing of rain from roof catchments

and storing it in containers or sub-surfaceground water reservoirs

ADVANTAGES:1. Reduced ground-water pumping cost2. High quality water, low in mineral content3. Reduced soil erosion rates in urban areas4. Less expensive and easy to construct, operate & maintain

PRECAUTIONS:1. Filters should be provided to avoid silting of

hand-pumps and tube-wells.2. Storage tanks should not be close to sources of

contamination (eg. Septic tank)

3. Setup should be regularly cleaned & disinfected4. Speed breaker plate should be provided below inlet

pipe so as to not disturb the filter material.

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Our Civilization Needs Water To Sustain