File No.CGWA-28/1/2020-CGWA

WATER MANAGEMENT PLAN TEMPLATE

Details of Assessment Unit State Tamil Nadu District Chennai

Block/Mandal/Taluk/Firka Mambalam-Guindy-IV Firka Category as per the latest ground Over Exploited water assessment (2017) Hydrogeological details Normal Rainfall (mm) Monsoon - 1154.82 Monsoon Non Monsoon – 72.86 Non Monsoon Aquifer Charnockite

Discharge of Wells (lps) Dugwells 1 to 3 Borewells/Tubewells 2 to 4 DCB 1 to 4 Water Quality Fresh Any other Quality Issue Fresh

Annual Water Availability Fresh Water Ground water (in MCM) 0.94934 availability Surface water including 0.11 major water bodies (in MCM) Grey water Domestic (in MCM) 0.5786 availability Industrial (in MCM) 0.3858 Annual water consumption Agriculture (in MCM) 0 Domestic (in MCM) 0.9644 Industrial (in MCM) 0.6429 Decadal Water consumption trends - (period) (MCM/year(Rise/falling/no change) Types ( Dug well/Borewell/TW/DCB Dug well & Bore well etc.) Common GW abstraction Average depth (mbgl) structures Dugwells 10 to 15 Borewells/Tubewells 30 m to 7 0 m DCB 15 to 30

Future availability

Surface water (MCM) - Ground water (MCM) 0 Monitoring Surface water Average inflow (Cusec)

Monitoring Average outflow (Cusec)

Quality (Potable/Non potable) Potable Ground water Average DTW (mbgl) 3.19 monitoring Average decadal water Fall level trends (m/year(Rise/falling/no change)) Water management options and mitigation

Recycle and Reuse of domestic waste water Reuse (Flushing, Horticulture, Usage of treated domestic waste Agriculture, Industry, water Construction, for Hoticulture and industrial uses etc) It is being managed within the Reuse of Industrial water industrial purpose like cleaning, Gardening, etc., Suggestion for crop diversification, Adaptive management micro- irrigation techniques, strategies effective usage of STP water etc. Water Rooftop RWH structures, conservation Type of artificial recharge RWH percolation ponds, construction of and recharge structure feasible Check dams

Abbreviations used mm: millimetre lps : Litres Per Second MCM: Million Cubic Metres TW: Tube Well DCB: Dug Cum Bore well Mbgl: Metres below groundlevel Cusec: One cubic foot per second DTW: Depth to water level RWH: Rainwater Harvesting