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Agricultural Economics Research Review
Year : 2011, Volume : 24, Issue : 2
First page : ( 217) Last page : ( 223)
Print ISSN : 0971-3441. Online ISSN : 0974-0279.

Cost Effectiveness of Rainwater Harvesting for Groundwater Recharge in Micro-Watersheds of Kolar District of India: The Case Study of Thotli Micro-Watershed §

Nagaraj N.a,*, Pradhani Umesha, Chengappa P.G.b, Basavaraj G.a, Kanwar Rameshc

aDepartment of Agricultural Economics; College of Agriculture, University of Agricultural Sciences, Bangalore-560 065, Karnataka

bDepartment of Agricultural Marketing Cooperation and Business Management, College of Agriculture, University of Agricultural Sciences, Bangalore-560 065, Karnataka

cDepartment of Agricultural and Bio-system Engineering, Iowa State University, Iowa, USA

* Author for correspondence, Email: nagarajnareppa@yahoo.com

§This paper is drawn from the project report funded by INDO-US Agricultural Knowledge Initiative in collaboration with ICAR on Water Harvesting for Groundwater Recharge.

JEL Classification: Q 15, Q 25

Online published on 14 November, 2011.

Received:  February,  2011; Accepted:  April,  2011.

Abstract

This study has estimated the supply augmentation of groundwater recharge due to creation of water harvesting structures and has assessed the cost-effectiveness of rainwater harvesting for groundwater recharge on watershed basis in one of the sub-watersheds of the Kolar district, Peninsular India — a typically hard-rock area. The study is based on the primary data for the year 2008–09 collected from a sample of 90 farmers having irrigation bore-wells in the selected watershed named Thotli. The study has indicated that the annual draft of irrigation water exceeds the annual recharge, causing a negative balance. On an average, the returns per rupee investment have been found to be 1.80 on farm pond, 1.78 on recharge pit and 1.39 on field bund. The cost incurred to impound a metre cube of water has been found as 3.01 in the case of field bund, where estimated recharge benefit is 5.6 m3, 1.67/m3 in the case of recharge pit (with an estimated recharge benefit of 720 m3), and 1.33/m3 in the case of farm pond (recharge benefit of 1350 m3). The discounted cost-benefit analysis of the investment on water harvesting structures has indicated that the investment on water harvesting structures is cost-effective and financially-viable.

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Keywords

Rainwater harvesting, Economic feasibility, Groundwater recharge, Watershed.

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