“Sustainable and Efficient Domestic Water supply in Urban and Rural Areas (Session-I-Rural Water Supply)” –8-12 April, India Water Week 2013, New Delhi
“Augmentation of groundwater by managed aquifer recharge around a non perennial river” S.Parimala Renganayaki and L.Elango Anna University, Chennai, Tamil Nadu
MAR by Check dam RIVER
CHECK DAM
Why MAR in Chennai ? Rainfall - 1260 mm/year
• • • •
North and south well fields Two Desalination plant Water transfer through pipe - Veeranam Tank Water is diverted from Krishna canal
But Still ? Authorities opened the reservoir Puzhal (Red Hills)
War for water The Hindu, CHENNAI, February 9, 2010
Objectives
• To identify the impact of check dam on improving the groundwater potential by Water level measurements • To estimate the percentage of recharge from check dam
Check dam across Arani River Length 266m Height 3.5m Storage capacity 0.8Mm3
Methodology
Field Multi parameter kit
Water level Indicator Monitoring wells in the study area
Sample bottles DGPS
Rainfall 1387mm 1035mm
Improved water level before and after construction of Check dam
Groundwater and surface water level variation
Recharge from check dam Infiltration (m3) = Change in storage (m3) – Potential Evaporation (m3)
66% of the water stored by the check dam was recharged into the aquifer
Conclusion High impact Raise in WL 3.5m
Check dam constructed at this location is able infiltrate about 38,600 m 3 of water per year
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