low cost irrigation structures and sri
TRANSCRIPT
Principle and practices for
Irrigation structures in rainfed areas
SHARAT SINGH
Schematic of land situation and their hydrology. Arrows show direction of water flow
Farm water harvesting
Paddy field with water body
Paddy with water body in the field
Rain(Jun-Sept):1140 mm=1.14 mCatchment Area: 50 ha
Collection from 1 ha 11400 M3
80% Harvestable 9120 M3
Losses (-)
4000 M3
Effective storage 5120 M3
1irrig(5cm)= 500 M3
512/500= 10 Irrign
Even if 50% of the Potential is stored
At least 5 Irrigns
WHT size: 4m deep X 1/10th of catchment area
Other Harvesting structures
5% model( for a field of size 100ftX100ft the cost for the model would be between 5000 to 6000)
Earthen bund Shallow tube wells(in areas having
high ground water table) Check dam with pipe flow irrigation
and or pedal
Earthen bund/ dam
Earthen Dam
Diversion channelPerennial source of spring water
RPVC pipe laid underground
Irrigation channelDiverting stream water for providing irrigation to
dry land area.Excess runoff passes through the natural drainage.
Surface water harvested for Ground water recharge and extraction method
Costing Rs 80,000
Government programmes ….
These structures could be built under the
MGNREGS Cost provisions for 10ft dia wells is more
than 1 lakh RKVY
Support for check dam, small irrigation structures
IWMPThe trust through it DBI programme
has also helped in assuring irrigation in many area
Thank you