Traditional methods of rain water harvesting

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Traditional methods of rain water harvesting

  1. 1. • http://www.rainwaterharvesting.org/Rural/Tra ditional2.htm#ahar • http://www.bebuffered.com/downloads/UNHA BITAT_Blue_Drop_Series_RWH&Utilisation.p df • Refer these sites for more info
  2. 2. Traditional Methods Of Rain Water Harvesting
  3. 3. INTRODUCTION • Water forms the lifeline • The population is increasing rapidly • All the inhabitants do not have access to safe water • There is major problem of supplying adequate water • Water Harvesting thus needed
  4. 4. Concept and Technology • A technology used for collecting and storing rainwater for human use ,using simple engineered techniques.
  5. 5. Methods • Paar system • Talab/Bandhis • Saza Kuwa • Johad • Nada/Bandha • Kunds/Kundis • Kuis/Beris • Baoris/Bers • Tankas/Tanks • Khadin • Bengal's Inundation Channel • Ahar-pynes
  6. 6. Paar system • A common water harvesting practice in the western Rajasthan • Rainwater flows from the agar (catchment) and percolates into the sandy soil • To acces Rajani pani (percolated water) kuis or beris are dug in the agor (storage area)
  7. 7. Talab/Bandhis • Natural - the ponds (pokhariyan) at Tikamgarh in the Bundelkhand region. • Human-made - the lakes in Udaipur. • When the water in these reserviors dries up just a few days after the monsoon, the pond beds are cultivated with rice.
  8. 8. Saza Kuwas • An open well with multiple owners (saza = partner) • The soil dug out to make the well pit is used to construct a huge circular foundation sloping away from the well.
  9. 9. Johad • Earthen check dams that capture and conserve rainwater • Five rivers that used to go dry immediately following the monsoon have now become perennial, such as the River Arvari, has come alive.
  10. 10. Nada/Bandha • Found in the Mewar region of the Thar desert • A stone check dam, constructed across a stream or gully, to capture monsoon runoff on a stretch of land
  11. 11. Kunds/Kundis • Looks like an upturned cup nestling in a saucer • A wire mesh across water- inlets prevents debris from falling into the well-pit. • The sides of the well-pit are covered with (disinfectant) lime and ash. • Most pits have a dome-shaped cover, or at least a lid, to protect the water
  12. 12. Kuis / Beris • Found in western Rajasthan, 10-12 m deep pits dug near tanks to collect the seepage • The mouth of the pit is usually made very narrow to prevent the collected water from evaporating • Used to harvest rainwater in areas with meagre rainfall.
  13. 13. Baoris / Bers • Baoris or bers are community wells used mainly for drinking • Can hold water for a long time because of almost negligible water evaporation.
  14. 14. Khadin • A khadin, also called a dhora, is an ingenious construction designed to harvest surface runoff water for agriculture • Based on the principle of harvesting rainwater on farmland and subsequent use of this water-saturated land for crop production.
  15. 15. Ahar pines • A catchment basin embanked on three sides, the 'fourth' side being the natural gradient of the land itself • Pynes are articifial channels constructed to utilise river water in agricultural fields. • The ahar-pyne system received a death-blow under the nineteenth-century British colonial regime.
  16. 16. Conclusion

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