World’s biggest automated single drip irrigation project.
Ramthal is located in the Bagalkot district of Karnataka has the world’s largest community based single drip irrigation project.
Due to insufficient water resources, farmers faced a lot of difficulties. Especially those who had holdings at the edge of the cut as they were not even able to cultivate one crop annually.
It involves over 2150 Kilometers of a pipeline which will cover around 60,000 acres of the drought-hit ground, at Ramthal Marola area of Bhagalkot district in Karnataka.
The area to be irrigated around 60,000 acres (24,000 ha) was divided into two packages.
The zones again were divided into high pressure and low-pressure zones which was divided into smaller sub-zones of 50 hectares.
The 50 hectares sub block could be irrigated in 10 shifts. In each shift on average the land of 2 to 3 farmers was irrigated.
Water from Narayanapur reservoir on Krishna river near marol village will be used for this project.
The water is carried from intake channel to jack well from there to the delivery chamber which resides at a height of 34 meters from where the water was supplied to fields using canals.
For this project the water is lifted from the first stage, the canal is lifted to another delivery chamber beside which a sump and pump house is constructed.
For East and West zone about 10 variable pressure pumps of 230 to 300 KW each were used from which the water is supplied through bulk HDPE water supply pipes to the primary head control unit.
For every 500 hectares area, a primary control unit is installed. The water is filtered here and channeled ahead.
Each primary control unit consists of automatic filters, controllers, and NMC controller for irrigation scheduling and radio net controller for solenoid valves.
After primary filtration, the water is carried by PVC feeder pipes into the secondary head control unit.
Post-secondary filtration the water is transported by PVC pipes into the assembly of automatic solenoid valves.
A PVC sub-main pipe takes water from the solenoid valve assembly to the manual valve residing in individual plots of farmers.
Finally, the water reaches the fertigation system where the fertilizers get mixed with water, and then the water is supplied to the field using the emitting pipes.
The project will reduce water usage, pesticide usage, costs, and increase yields for the farmers. The technology used in this project will also purify the wastage the flows in the backwaters of River Krishna.
The mega drip irrigation project will benefit more than 15,000 farmers and help in preventing the loss of agricultural land in India.