A CASE STUDY TO INCREASE THE BENEFITS ON INTERLINKING OF PAR-TAPI-NARMADA LINK PROJECTR.K. JAIN, M.D. DANIYAL AND RAJESH GOYAL
The complexity of uneven distribution of rainfall in time and space necessitates need for storages and transfer of water from water surplus region to water deficit regions. The ILRP advocates diversion of water outside command area of catchment up to storage site to fill up gap between availability and requirements of water. The research is aimed to conduct critical analysis of project benefits, Irrigated area, quantum of water to be transferred and enhancement of benefits of one of interlinking project viz Par-Tapi-Narmada link basic genesis of feasibility level proposal of Par-Tapi-Narmada link. An attempt has been made to review the proposal at Feasibility Stage and suggest measures for improvement. The Par-Tapi-Narmada Link ILR proposal at Feasibility Stage (2005) was finalized with diversion of 1350 MCM of water out of which a major portion was used for supplementing Narmada Command and later use of saved water by substitution in Narmada Command of Saurashtra and Kutch. The cost of Rs. 60,164 Million was mainly for 7 Dams and 400 km long canal only. Thus, there was a need to optimize benefits by using better irrigation techniques. At that time perhaps there was less or no practice of micro irrigation in Project Command which could have served 169 thousand hectares in less or no water thus making more water available for target command in Saurashtra and Kutch region. There is possibility of optimizing water utilization by reducing irrigation intensity in enroute command. Reduction of water can be done by deleting dams and B-C ratio can be increased from 1.08 to 1.29 as observed in various combinations. Therefore, there is need for re considering 7 dams in position and adopting 5 to 6 dams. An introduction of micro irrigation in the command area by switching over from gravity flow irrigation increases the Benefit Cost ratio of the project considerably. The B C ratio goes on increasing with the increase in percentage of micro irrigation. While working out the same, the yield/benefits of the crops have been kept as per FR. In addition to above, possibility of mitigation of climate change and generating solar power at top canal has been explored.