Till about thirty years back, the areas around our homes and
offices used to be unpaved and the rain falling on these areas would percolate
into the soil and remain there for being drawn through shallow open wells. With
the proliferation of flat complexes, not only have these areas been paved and
percolation of rainwater into the soil almost totally stopped, the quantity of
water drawn from the soil below has increased manifold. Consequently open wells
and not - so - deep bore wells started drying up. The reason is that no sincere attempt
is made to replenish the ground water table with rainwater during the monsoon.
As individuals, groups and communities, let us all wake up before it is too late and not only understand what rainwater harvesting is all about but also implement measures to harvest rainwater in our houses and flat complexes and put it into the soil for our subsequent use.
Frequently Asked Questions on
Rain Water Harvesting
1. What is Rain water Harvesting ?
Rain water is the ultimate source of fresh water. The
activity of collecting rainwater directly or recharging into the ground to
improve ground water storage in the quiver is called as Rain Water Harvesting.
2. Why Rain Water be Harvested ?
Rain water is to be harvested to conserve and augment the storage of ground water, to reduce water table depletion, to improve the quality of ground water, and to arrest sea water intrusion in coastal areas.
3. How Rain Water be harvested ?
For recharging ground water, rainwater may be harvested by two ways, Rain water that falls on the terrace of the buildings and in the open spaces around the buildings.
Similar to recharge pit but
longitudinal in shape Size : 0.5 -
1 m wide 1 - 1.5 m depth. Length may vary from 1.0 - 5.0 km Filled with broken
bricks /pebbles Suitable for sandy sub-soil area.
RECHARGE TRENCH WITH BORE METHOD
Along the recharge trench boreholes has to be drilled Borehole interval 10 -15 feet Suitable for clay area.
i. Above structures are meant for area with large catchment like apartments / big complexes.
ii. RCC slab cover is optional.
iii. Top (1") portion may be filled with sand.
2.Bore well with settlement tank method
4.Percolation pit with bore well method:
Constructed in the open space at required intervals. Size
" 1m x 1m x 1.5m (depth) Filled with broken bricks / pebbles Suitable for
sandy sub - soil area One unit for 300 sq.ft area (approx.)
PERCOLATION PIT WITH BORE METHOD
A borehole to be drilled at the bottom of the percolation pit. Bore hole size : 150 - 300 mm dia with 10 –15M depth (approx.) Filled with broken bricks. Suitable for clay area.
Following field tested IEC (Information, Education and
Communication) methods were implemented to create awareness among the people of
Rain Water Harvesting.
* Sensitization Meetings, Seminars, Workshops.
* Information Centres, Models, Folk arts.
* House to house visits & exposure visits.
* Informative pamphlets & Booklets, Mini exhibitions.
* Posters, Handbills, Wall Writings, Questionnaires.
* Small groups meetings, Demonstrations.
* Street corner propaganda, Cycle rallies.
* Video & Cable TV, Public address system.
* Appeal in news papers & through personal letters.
IMPORTING NOBLE IDEAS TO STUDENTS
Sensitized the teaching community, students and their parents on the importance of harvesting. All schools, colleges, polytechnics, ITI were involved in the campaign. Organised rallies, Essay writings, discussions and demonstrations with the involvement of Eco clubs. Students were made to involve in creation of structures. Participation of local community, parents-teachers associations (PTA) and contribution of school management were ensured.
Rain Water Harvesting in Kanyakumari District
District Administration of Kanniyakumari has taken up the concept of Rain Water
Harvesting on its top most priority agenda in tune with directives in this
regard by the Hon’ble Chief Minister.. In
order to promote the concept of Rain Water Harvesting, the district
administration has been working at three stages. In the first stage, the public awareness is being generated
in order to popularize the concept of Rain Water Harvesting among the Common
manner. In the second stage the
technical officials and Engineers are being trained regarding various method of
Rain Water Harvesting. In the third
stage, all the officials of Government Departments and local bodies including
the elected representatives are to implement the Rain Water
Harvesting in all the Government, Public and Private buildings.