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