Let’s face the challenges Together !

Let’s become Water – Rich

Surface Water

This includes streams, rivers, lakes, reservoirs, and wetlands.

Ground Water

Water store beneath the surface of earth within soil and layers of rocks.

Rainfall

Sky is the limit but come down to earth.

Plant trees, Grow forests, Collect rainfall.

Reduce Wastage

Even a few small changes in your routine can save hundreds of litres of water.

Impro-Wise Consumption

Improve the way you consume water and be Water-wise to save water. 

Recycle Water

Did you know that water you have used can be reused and recycled ? 

Surface Water Resources

             Baseline Water Stress Map    <<
            Tamil Nadu River Basin Map    <<
                          Cauvery Basin   <<
           Course of Cauvery (Schema)   <<

FACTS

  • The total surface water of Tamil Nadu is 876.06 TMC (24864 MCM)

  • Around 59 lakh acres (24 lakh hectares) of land in Tamil Nadu is irrigated utilising 90% of the surface water.

  • The total length of rivers and canals in Tamil Nadu is 7420 Kms.

  • There are 17 river basins (ONE major, 13 medium and 3 minor river basins), 61 reservoirs and 41,948 tanks.

– Tamil Nadu ENVIS centre – July 2018

– Ministry of Statistics and Programme Implementation, 

Govt. of India

THOUGHTS

  • Cauvery – This is the ONLY major river basin in Tamil Nadu that flows ONLY across central parts of Tamil Nadu and this ONLY major river basin is almost always dry.

Ground Water Resources

                     Ground Water Stress    <<
          Ground Water is over exploited   <<
                Ground Water Depletion   <<
                Ground Water Recharge   <<
                                   

FACTS

  • The Ground Water available for use is 791.86 TMC ( 22,423 MCM ) – i.e., The Water table 

  

  • 60 % of the available resource, i.e., 478.8 TMC (13.558 MCM) is withdrawn artificially or naturally – i.e., The Net Water Draft

  • 40% is available to use 313.42 TMC ( 8875 MCM ) – Available Water table

  • Over the last five years, the percentage of blocks with safe ground water levels has decreased from 35.6% to 25.2 % 


  • The semi-critical blocks have increased by about 10 %    

  

  • Over-exploitation has already occurred in more than a third of the blocks (35.8 per cent) while eight blocks (2 per cent) have turned saline.

– Tamil Nadu ENVIS centre – July 2018

– Ministry of Statistics and Programme Implementation, 

Govt. of India

THOUGHTS

  • If ONLY 60 % is withdrawn and utilised why there is a decline in water level.

  • Net water draft (60%) includes not ONLY communal use but also commercial use.

  • 40% of available water table is dense in some areas leaving other parts of Tamil Nadu dry.

Rainfall: The requisite resource

Trees: Pre-requisite

             Rainfall distribution – 2018    <<
   Deviation of normal rainfall – 15 yr data   <<
                 Impact of deforestation   <<
                                   

FACTS

  • North East Monsoon (NEM) 2018 : Actual rainfall (Total in mm) : 290.70

  • Deviation from normal in Dec 2018 (only) : Minus 76 Per cent (-76 %)

  • The forests of Western Ghats lends 40 % of moisture to the southwest monsoon rainfall over Tamil Nadu during normal monsoon years.

– Climate and Rainfall Details Released Under NDSAP

– March 2019, NEM2018 report

– Moisture supply from the Western Ghats forests to water deficit East Coast of India

Paul, S., Ghosh, S., Rajendran, K., &Murtugudde, R. (2018)

THOUGHTS

  • The ONLY indispensable source of water – RAINFALL

  • The ONLY renewable and rechargeable source of water – RAINFALL

  • The ONLY major capacitor for rainfall – TREES

Water Saving & Conservation

Together, We can make it happen

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