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Evaluation of Percolation Tank Efficiency on Groundwater Recharge: A Case Study for Karnampettai Percolation Pond, India

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Title Evaluation of Percolation Tank Efficiency on Groundwater Recharge: A Case Study for Karnampettai Percolation Pond, India
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Creator Surinaidu, L., Raviraj, A., Rangarajan, R.
Water Technology Center, Tamil Nadu Agriculture University, Coimbatore - 641003
 
Subject Percolation tank, tracers, MAR, WDP, Karnampettai.
 
Description Not Available
Over abstraction of groundwater when compared to less amount of rainfall recharge throughout India is mainly
due to increasing demands for irrigated agriculture causing severe groundwater depletion. Such an alarming
situation is increasing unabated in spite of massive water harvesting measures that are implemented through
watershed development programs (WDP). In order to improve the artificial percolation efficiency some new
developmental programs are being implemented through managed aquifer recharge (MAR) (mainly percolation
tanks and check dams). Keeping in view the well known Water Development Programs limitations due to
the increasing number of recharging structures and huge cost involved in their construction, it has become
necessary and important to evaluate and understand the MAR performance for sustainable management
of groundwater resources. The present study examines the percolation efficiency of typical Karnampettai
percolation tank located in Tamilnadu, South India using an integrated approach combining geophysical,
hydrogeological and geotracer (radiotracer: tritium and chemical tracers: rhodamine B, bromide) investigations.
The results indicated that percolation from the tank is 28 to 35 mm/day with an average percolation rate
of 32 mm/day. The percolation rate is reduced progressively with a gradual decline of water level in the
percolation tank. The average natural recharge (rainfed and irrigation fields) in the study area is 30 mm
(8% of the rainfall). The study indicated that 65% of the total rainfall is lost due to soil moisture deficiency
caused by evaporation and evapotranspiration. The study also reveals that the groundwater flow velocity
near to the percolation pond is 2 m/day with effective groundwater recharge zone of 275 m.
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Date 2019-11-25T06:52:51Z
2019-11-25T06:52:51Z
1001-01-01
 
Type Article
 
Identifier Surinaidu, L., Raviraj, A., Rangarajan, R. 2018. Evaluation of Percolation TankEfficiency on Groundwater Recharge: A Case Study for Karnampettai Percolation Pond, India. The Journal of Indian Geophysical Union 3, 292-305.
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http://krishi.icar.gov.in/jspui/handle/123456789/25174
 
Language English
 
Relation Not Available;
 
Publisher Indian Geophysical Union