Impact of rainwater harvesting on groundwater recharge in water stressed Aravali hill ecosystem
DOI:
https://doi.org/10.53550/Keywords:
Aravali hills, Earthen dams, Ground water recharge, Rain water harvesting, Well observationsAbstract
Alarming ground water extraction to expand irrigation in Aravali hill ecosystem disregarding low rainfall, sandy soils and harsh climate created water crisis in this region. Under a corporate supported initiative, 194 earthen dams were constructed and 1250 ha of waste lands were leveled to harvest rainwater to recharge ground water between 2006 and 2013 in 40 villages of Alwar district of Rajasthan. In one typical village, 15 earthen dams were constructed and 85 ha of private waste lands were leveled. The reservoir areas were contour surveyed to find storage capacities. Daily rainfall and fortnightly observations from seven wells were recorded to find out changes in groundwater level. The records of all the tube wells were compiled by household survey to assess the level of ground water extraction. Between 1982 and 2012, the number of tube wells increased from 2 to 128 lowering mean water table by 3.6 m. 64 shallow tube wells had to be converted to submersible motors from 2007 to 2012.Though 15,03,800 cu m rainwater was harvested from 884.89 ha of rocky Aravali hills but this effort could not reverse the trend of ground water depletion. Data revealed that when there was no reservoir in nearby area of observation wells but number of submersible motors were installed on nearby reclaimed lands and cropping pattern changed in favour of vegetable crops; there was clear drop in water table making the scenario unsustainable for irrigated agriculture. Where there were number of reservoirs nearby, the drop was much less in spite of two to three submersible motors nearby indicating chances of sustainability. Out of seven observation wells, only one indicated the chances of sustainability, two showed partial and four no chances of sustainability. The land reclamation activity not only promoted installation of more bore wells on reclaimed land but also reduced water inflow to the reservoirs thus reducing the scope of rainwater recharge. Reducing area under summer vegetable crops, retaining sufficient area under traditional Pearlmillet and Mustard, expanding area under drip and sprinkler irrigation and regulation to control the number of new bore wells appeared the only way out of this complex problem.
References
Adhikari, R.N., Singh, A.K., Math, S.K.N., Sharma, K.K. and Reddy, K.K. 2015. Study on the effect of groundwater recharge through water harvesting structures in semi-arid red soil region of south India. Ind. J. Soil Cons, 43(3): 266-270.
Agarwal, A. and Narain, S. 1997. Dying wisdom- the fall and potential of India's traditional water harvesting systems,” Centre for Science and Environment, Delhi.
Agnihotri,Y. and Grewal, S.S. 2013. Economics of rain water conservation, waste land development and production improvement through watershed management: a case study in village Gualda of Aravali ecosystem. Ind. J. Soil Cons 41: 69-76.
Anderson, E.P., Chauhan, N.K., Melesse, A.M., McClain, M.E., Price, R.M. and Stiefel, J.M. 2009. Effects of rainwater harvesting induced artificial recharge on the groundwater of wells of Rajasthan, India. Hyrogeol., 17(8): 2061-2073.
Bhan, S. 2009. Rain-fed area development through integrated watershed
management. In: Bhan, S., Karale, R.S, Singh, Shamsher, Bharti, V.K. and Subramanian, S. 2009. Conservation Farming. Publication of Soil Conservation Society of India, New Delhi, pp. 336-344.
CGWB. 2005. Master plan for artificial recharge to ground water in India, Central Ground Water Board New Delhi.
CSWCRTI, RC, Datia. 2004. Participatory Watershed Management for sustainable development in Bajni Watershed, Datia, M.P. Publication of the Central Soil and Water Conservation Research and Training Institute, Research Centre, Datia, Madhya Pradesh, 73p.
DFID. 2006. Managed Aquifer Recharge: an assessment of its role and effectiveness in watershed management. DFID KAR project R 8169. Keyworth, Nottingham, Brikh Geological Survey 2006.
Frevert, R.K., Schwab, G.B., Edminster, T.W. and Bernes, K.K 1955 Soil and Water Conservation John Wiley & Sons ING, New York, 479 p.
Gledenning, C. and Vervoort, R.W. 2008. Quantifying the impacts of rainwater harvesting in a case study catchment: the Aravari river, Rajasthan, India. Aust. J.Water Resour., 12(3).
GoI, MoA, 2001. Watershed at work: Success stories of watershed programs. A publication of Govt. of India, Ministry of Agriculture, Department of Agriculture and Cooperation, Krishi Bhavan, New Delhi. 264 p.
Grewal, S.S., Prakash, C., Kaushal, R.C., Yadav, K.S., Arya, S.L. and Singh, Gurmel. 1992. For rehabilitation of degraded Aravalis through watershed management: manethi watershed (Distt. Rewari, Haryana). Publication of the Central Soil and Water Conservation Research and Training Institute,Dehradun.
Katiyar, V.S. 1999. Impact of water harvesting and recycling in South-Eastern Rajasthan. Ind. J. Soil Cons., 27(1): 22-25.
Machiwal, D., Ojha, S. and Purohit, R.C. 2013. Rainwater harvesting to augment groundwater levels: a case study. J. Agric. Eng.,50(4).
MoWR, 2009. Ground water resources estimation methodology. Ministry of Water Resources, Govt. of India, NewDelhi.
Meinzer, O.E. 1949. Hydrology, Physics of Earth IX Dover Publications, NewYork
Meyer, A.F.1942. Evaporation from lakes and reservoirs, Minnesota Resources Commission. St. Paul.
Nagaraj, N., Pradhani, Umesh, Chengappa, P.G., Basavaraj, G. and Kanwar, R. 2011. Cost effectiveness of rainwater harvesting for groundwater recharge in micro-watershed of Kolar district of India: the case study of Thotli micro-watershed. Agric. Econ. Res. Review, 24(2): 217-223.
Narain, P., Khan, M.A and Singh, G. 2006. Potential for water conservation and harvesting against drought in Rajasthan, India. Working Paper 104 (Drought Series: Paper), International Water management Institute (IWMI), Colombo. Sri Lanka.
Nema, R.S., Jain, L.K. and Verma, O.P. 2003. Studies on groundwater recharge and recycling of rainwater strategies in Malwa plateau, In: Proc. Rainwater management for water security , Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, January 6-7, 2003, pp. 130-133.
Pande, V.C., Kurothe, R.S., Sena, D.R. and Kumar, G. 2015. Implication of optimal groundwater extraction for sustainable groundwater use in Indian semi-arid tropical watershed. Ind. J. Soil Cons., 43(1): 1-8.
Rathore, M.S. 2005. Groundwater exploration and augmentation efforts in Rajasthan A review. Institute of Development Studies, 8-B, Jhalara Institutional Area, Jaipur-3.
Singh, Gurmel, Grewal, S.S. and Kaushal, R.C. 1990. Watershed Management in Aravali Foot-hills. Publication of the Central Soil and Water Conservation Research and Training Institute Dehradun. 119 p.
Singh, H.P. and Sharma, K.D. 2003. Rainwater management in semi-arid region,In: Proc. Rainwater management for water security, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, January 6-7, 2003, pp. 28-34.
SPACE. 2011. Impact evaluation of a natural resource management for poverty alleviation in a challenging Aravali ecosystem: a case study of Gualda village. The publication of the Society for Promotion and Conservation of Environment Chandigarh. 87 p. www.spacechandigarh.com.
Thornthwaite, C.W. and Holzman.1942. Measurement of evaporation from land and water surface. U.S. Deptt.Agri.Tech. Bill. 817.
Yadav, R.P.,Aggarwal, R.K., Singh, P.,Arya, S.L., Prasad, R.,Tiwari,A.K., Bhattacharyya, P. and Yadav, M.K. 2003. Rainwater harvesting and recycling technology for sustainable use of small agricultural watersheds. Indian J. Agric. Sci., 76(8): 506-510.
