Training of Trainers in Entrepreneurship Development in Rain Water Harvesting Techniques of rain water harvesting - PowerPoint PPT Presentation

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Training of Trainers in Entrepreneurship Development in Rain Water Harvesting Techniques of rain water harvesting

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in Rain Water Harvesting Techniques of rain water harvesting Workshop Conducted By Eureka Forbes Institute of Environment For Maharashtra Centre for Entrepreneurship ... – PowerPoint PPT presentation

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Title: Training of Trainers in Entrepreneurship Development in Rain Water Harvesting Techniques of rain water harvesting


1
Training of Trainers in Entrepreneurship
Development in Rain Water HarvestingTechniques
of rain water harvesting
  • Workshop Conducted
  • By
  • Eureka Forbes Institute of Environment
  • For
  • Maharashtra Centre for Entrepreneurship
    Development

2
Water Harvesting
3
Simplest rain water harvesting
During Rainy season, Drinking water needs of
35-house village are met by a simple saree based
rainwater harvesting system. Kerala 7 months of
rainy season (Pic Shree Padre)
4
Components of an urban RWH system
  • Catchments
  • Channels/rainwater or down-take pipes
  • First flush devices / tricks
  • Storm water drains
  • Filter units
  • Storage tanks
  • Recharge structures

Terrace SWD
Subsoil water Ground water
5
Catchments
Roof tops or other suitable surfaces Roof tops
can give very clean water Paved areas also give
moderately good water Un paved areas give water
mixed with soil/ silt Maintenance Catchments
should also be cleaned regularly to remove dust,
leaves and bird droppings so as to maintain the
quality of the product water. Junk materials
should not be dumped on it.
6
Catchments
7
Clean Roof Haveli Storage tank in the
Raised Plinth
Harvesting for Future Use Storage in Tanks
8
Channels / rainwater down-take pipes
Channels Are needed to collect water from
sloping roof Rain Water Down-take pipes Are
needed for flat roof Spouts/ open pipes need to
be converted to the down-take pipes Maintenance
Their slopes and sizing should be proper They
need to be cleaned before monsoon. And realigned
if disturbed
9
Channels / rainwater down-take pipes
10
Channels / rainwater down-take pipes
11
First Flush Devices
First Flush Are needed to divert first few mm
of rain water out of the system Simple capped
pipes / plug bends can act as first flush More
complicated structures can also be devised
Maintenance Timely opening and closing of the
first flush gives maximum good quality water for
harvesting
12
First Flush Devices
13
Filter units
Filters Are used for additional cleaning of
rain water Or storm water These can be passive
like devas filter, screen filters, sand and
gravel filters Or advanced passive
multi-chambered filters or Active like PSF,
MGF (DMF) ACF etc Maintenance Passive filters
are easy to maintain Active ones are not so
particularly in housing society set up
14
Recharge Structures
Recharge Structures Are needed for harvest for
dry season approach Harvested rain water is
pushed under ground for retrieval later in the
dry season These could be simple recharge
pits, punctured storm drains, recharge pits with
bore holes, or recharge of wells/ bore wells with
filtered rain water, WATs and ponds are needed
for extremely large areas Maintenance Appropriate
cleaning recharge structures Retaining
porosity and cleanliness of the filter media
15
Harvesting for Future Use Storage in Soil
Strata-I Recharge Pit 1
Terrace Building Use through well/ Bore well
Simple Ground Water Recharge Pit
Permeable strata Subsoil water Ground water
16
Harvesting for Future Use Storage in Soil
Strata-I Recharge Pit Type 2
Terrace Building Use through well/ Bore well
Recharge Pit With a deeper shaft
Impermeable strata Subsoil water Ground water
17
Harvesting for Future Use Storage in Soil
Strata-I Recharge Type 3 --- combination well
Combination well
Impermeable strata Less Subsoil water Main
Source Ground water
18
Harvesting for Future Use Storage in Soil
Strata - II Recharge through Dug well
Terrace Building Recharge through well
Use through well/bore well
Permeable strata Subsoil water Ground water
19
Harvesting for Future Use Storage in Soil
Strata - III Recharge through Bore well
Terrace Building Recharge through bore
well Use through bore well
Ground water
20
Storm Water Drains
Storm Water Drains Are usually ground level
channels/ gutters for specifically taking the
storm-water out of an area During harvesting
exercise we may need to modify / puncture these
however safe exit must be kept for the excess
rain water Maintenance Cleaning before the
rainy season and if need be during the rainy
season
21
Harvesting for Future Use Storage in Soil
Strata - IV Recharge through trenches or
punctured storm drains
Improved Ground water
22
Harvesting for Future Use Storage in Soil
Strata - V Improving permeability of pavement

Terrace Building Recharge through soil
Use through well/bore well
Ground water
23
Storage tanks
Storage Is needed for Use when available and
also for keep for dry season approach It can be
man made like various types of tanks Or it can
be gaps in Mother Earths Crust Maintenance Appr
opriate cleaning for man made tanks Retaining
porosity and serenity of the earths crust
24
Modified from Stephen Lemcke, 2002
Natural Solutions
25
Birth of water supply department in Varanasi
Natural Solutions
26
River Varuna
Water scarcity on the Banks of mighty Ganga
Natural Solutions
27
Varuna
Varuna
River Varuna
Water works
Water works
River Assi
One who makes and preserves ponds gets to taste
sweetness of water
28
Ancient water harvesting sites
  • A few relics of once glorious tradition and a
    way of life

29
Jalashayanam Vishnu Temple Mahabalipuram, sweet
water pond hardly 200 ft from sea water
30
Rameshwaram shrine a few hundred feet from sea.
Note the gaps (kept on purpose in Foundation and
the Sweet water in the foundation reflecting
the Gopuram
31
Fort Dindigul, Tamil Nadu plenty amongst scarcity
32
Fort Dindigul, Tamil Nadu plenty amongst scarcity
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