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WATER MANAGEMENT SYSTEM FOR A HOSTEL BLOCK OF JADAVPUR UNIVERSITY, KOLKATA

WATER MANAGEMENT SYSTEM FOR A HOSTEL BLOCK OF JADAVPUR UNIVERSITY, KOLKATA. A PRESENTATION BY : PROBHASH KUMAR BISWAS TIRTHANKAR SARKAR. THE SITE.

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WATER MANAGEMENT SYSTEM FOR A HOSTEL BLOCK OF JADAVPUR UNIVERSITY, KOLKATA

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  1. WATER MANAGEMENT SYSTEM FOR A HOSTEL BLOCK OF JADAVPUR UNIVERSITY, KOLKATA A PRESENTATION BY : PROBHASH KUMAR BISWAS TIRTHANKAR SARKAR

  2. THE SITE WE HAVE PROPOSED A WATER MANAGEMENT SYSTEM IN A PART OF JADAVPUR UNIVERSITY MAIN HOSTEL, KOLKATA, WHERE WATER IS WASTED CASUALLY. THE WASTAGE OF WATER IS HARD TO BE REDUCED IN SUCH A PLACE LIKE THIS HOSTEL. SO WE AS ARCHITECTS HAVE TO REDUCE THE EXPENSES ON PROCURING THE REQUIRED WATER BY DESIGNING A PROPER SYSTEM OF WATER MANAGEMENT. CAUSES FOR NEED OF PROPER WATER MANAGEMENT • UN TREATED POND WATER IS NEVER RECYCLED. • WASTAGE OF RAIN WATER AS IT DRAINS INTO THE MUNICIPAL DRAINAGE SYSTEM. • NO SCREENING SYSTEM OF THE STORM WATER. PREVAILING CLIMATIC CONDITIONS MAXIMUM TEMPERATURE IS RECORDED DURING MAY –35.2° C MINIMUM TEMPERATURE IS RECORDED DURING JANUARY –14.1° C ANNUAL AVERAGE RAINFALL IS 1.191 M. THE FOUR MONSOON MONTHS (JUNE TO SEPTEMBER) CONTRIBUTE ABOUT 89% OF THE TOTAL ANNUAL RAINFALL.

  3. STORAGE TANK MAXIMUM WATER LEVEL PUMP INFILTRATION GALLERY SEPTICTANK DISCHARGING OF BLACK WATER TO GROUND THROUGH SOAK PIT PUMP GREY WATR FILTER CUM FLOCCULATOR SOAK PIT RECYCLING OF GREY WATER SAND LAYER SUPPORTING WALL BRICK BALLAST TO STORAGE TANK INFILTRATION GALLERY BRICK VAULT CONTAINING WEEPHOLES PORUS CERAMIC PIPE OF Φ150 MM RECHARGE PIT COLLECTING WATER FROM ROAD RUN OFF

  4. GREY WATER RECYCLING HYACINTH TILAPIA GREY WATER FROM TOILETS POND PUMPED TO POND USED IN TOILETS FOR BATHING AND WASHING INFILTRATION GALLERY FLUSHING OF WATER CLOSETS STORAGE TANK PUMPED UP TO ROOF-TOP STORAGE TANK DISINFECTANT ADDED

  5. Considering the area around Jadavpur :- Annual average rainfall is 1.919 m (say 1.9 m) No. of rainy days are 146. No. of non rainy days are 219. Roof top harvesting potential of the ‘D-Block’ :- Area of terrace is 325 sqm Runoff coefficient for roof is 0.85 (85%) Volume of rainfall on the terrace is ( 325 sqm X 1.9 m X 0.85 ) = 524.9 cum (say 525 cum) By proper harvesting procedure we can harvest at most 70% of the total rainfall. Volume of water that can be harvested = (525 X 0.7) = 367.5 cum Storage potential :- Nos. of boarders in the hostel = 100 (maxim.) Per capita consumption for drinking and cooking = 10 litres. Yearly water requirement for drinking and cooking = (100 X 10 X 365) = 365000 litres = 365 cum of water < 367.5 cum. Hence if we design a rain water storage tank of size 12 m X 10 m X 3.25 m = 390 cum, it would be good enough to store drinking and cooking water for use, throughout the year. # [Provided that the water is properly harvested and purified.] RAIN WATER HARVESTING FOR DRINKING PURPOSES SEMI UNDERGROUND WATER STORAGE TANK SOLAR WATER PURIFIER SOLAR WATER PURIFIER ROOF TOP WATER RESERVOIR

  6. OBTAINED FROM RAIN- WATER HARVESTING PRODUCING GREY WATER INTAKE FROM POND PRODUCING BLACK WATER OUT OF THE 98 LITRES OF GREY WATER SAY 85 % IS SENT BACK TO THE POND FOR RECYCLE BY EACH PERSON EACH DAY. HENCE ( 0.85 x 98 = ) 83.3 LITRES OF WATER IS RETURNED OUT OF 128 LITRES TAKEN FROM THE POND BY EACH PERSON EACH DAY. SO EACH PERSON DOES NOT RETURN ( 128 – 83.3 = ) 44.7 LITRES OF WATER TO THE POND EACH DAY. SO 100 PERSONS IN 219 DRY DAYS DOES NOT RETURN ( 44.7 x 219 x 100 =) 978930 LITRES OR 978.93 CUM OF WATER TO THE POND WHICH HAS A CAPACITY OF ABOUT 15000 CUM OF WATER. HENCE ONLY ABOUT 6 . 5 %OF WATER IS REDUCED FROM THE POND DURING NON-RAINY DAYS IN A YEAR, WHICH IS NEGLIGIBLE COMPARED TO THE RAIN FALLING ON THE POND IN THE RAINY DAYS.

  7. CONCEPT : • TRADITIONALLY IN THE VILLAGES OF INDIA PEOPLE USE TO BATH IN PONDS. SO INSPITE OF HAVING A HUGE WATER BODY IN THE VICINITY, WHY SHOULD WE SIP UP THE VALUABLE UNDERGROUND WATER FOR NON POTABLE PURPOSES? EFFECTIVE DESIGNING: • WE ARE OBTAINING BATHING AND WASHING WATER FROM THE POND IN A PURE FORM WITHOUT HAMPERING THE ECOLOGICAL SYSTEM OF IT. • RAINWATER IS BEING HARVESTED FOR PROVIDING DRINKING WATER THROUGH OUT THE YEAR BY PURIFICATION USING SOLAR ENERGY. • AFTER ALL WE ARE ABLE TO PROPOSE A WATER SYSTEM INDEPENDENT OF UNDERGROUND WATER SOURCES, EXCEPT DURING SOME ACCIDENTAL OR NATURAL DISASTROUS CAUSES. MAINTAINABILITY: • THE SAND BED OVER THE INFILTRATION GALLERY NEEDS TO BE REPLACED AFTER PERIODIC INSPECTION, MAY BE AFTER EVERY 6 TO 12 MONTHS. • THE GREYWATER FILTER NEEDS TO BE CLEANED PERIODICALLY, MAY BE MONTHLY OR BIMONTHLY. COST EFFECTIVENESS: • THE ENTIRE PROJECT REQUIRES ONE TIME INSTALLATION COST,WHICH IS NOT TOO HIGH AND REQUIRES MINIMUM MAINTENANCE.

  8. THANKYOU

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