Techno−economic evaluation of shallow tube well in the dry river bed of coastal Odisha
Keywords:
BCR, Dry river bed, Internal rate of return, Net present value, Payback period, Shallow tube wellAbstract
A feasibility study for installation of shallow tube well in the dry river bed of defunct Ekdal river lift (RL) project of Narasingpur block of Cuttack district of Odisha was carried out, which has 40 ha command area. For this purpose, estimation of water requirement of the crops grown in 40 ha area was done. A pumping test was conducted to determine various hydraulic parameters by Theis recovery method. Using the determined values of the hydraulic parameters and following Darcy's formula, the base flow was calculated. The base flow was found to be enough to meet the water requirement of crops. The values of various economic indicators such as net present value (NPV) were found to be ` 24806749/− for a 40 ha command area with a BCR of 1.48. The internal rate of return (IRR) was 35% along with a payback period (PBP) of 6 years. From these values of economic indicators, it can be said that the installation of a shallow tube well in a dry river bed in a defunct RL project of the study area is both technically feasible and economically viable.
