POWERPOINT PRESENTATION ONWater Distribution Planning in Urban Area BY- PIYUSH KUMAR
URBAN WATER SUPPLYWater is a precious natural resource and one ofthe most essential requirements of all living being.Regions with the highest growth rate are nothaving access to water both in terms of quantity andquality.Indian cities receive intermittent water supply.Need is to understand – Quantity is not sufficientan quality is deteriorating.
PIPED WATER SUPPLIED IN CITIESMajor source of supply.Intermittent and erratic.Pressure is not acceptable.In equalities in service provision between the richand poor.High rate of water losses from the distributionsystem.
ISSUES AND CHALLENGESPopulation growth and Urbanization.Growing urban water demand.Infrastructure is aging and deteriorating.Increased pollution from municipal and industrialdischarge.Over exploitation of water resource.
WATER SUPPLIES IN INDIAN CITIES S.NO NAME OF CITY LPCD 1. BANGLORE 138 2. CHENNAI 136 3. DELHI 154 4. HYDERABAD 181 5 KOLKATA 83 6. MUMBAI 263SOURCE: CENTRAL POLLUTION CONTROLBOARD
IMPACT OF WATER ON LIVING CONDITIONInadequacy in the quantity and quality of drinking water –Unsafe.Inadequate infrastructure in the disposal of waste water –poor sanitation.Unsafe water to poor sanitation leading to poor hygieneand water-related disease.
CAPACITY OF PIPED WATER SUPPLY IN BANGLORE CITY Established Actual Source During Potential Supply (Year) (MLD) (MLD) 1. Aarkavati River 1896 36 - a) Hesaragatta 1933 148 60 b) T.G. Halli 2. Cauvery River 1974 135 135 a) Stage - 1 1983 135 135 b) Stage - 2 1993 270 270 c) Stage - 3 2002 270 270 d) Stage - 4 - Phase-1 2011* 500* 500* e) Stage – 4 – Phase-2* 1494 1370 TOTAL*The Cauvery Water supply stage – 4 –Phase – 2 is under implementation and will becompleted in 2011. ** The Quantity from TG Halli (60 MLD) might be very less in that day.
SUPPLY AND DEMAND GAPThe supply cannot meet the demand. The unaccounted for water is about 35-40%. To meet the deficit other source of water and tapped. BWSSB is also supplying water through its 6750 borewells and 22 water tankers.
GROUNDWATER SCENARIO IN BANGLORE CITYGroundwater plays an important role in the total watersupply of the city. 40% of the population of Bangalore isdependent on ground water.Number of the bore wells in the city is ranging from200,000 to 400,000.Over exploitation and poor management have contributedto groundwater depletion and quality problem.
PRESENT SCENARIO OF WATER SUPPLYBWSSB has divided Bangalore in to six zone. Calculation of water consumptionPIPED WATER SUPPLY – Population and per capitaconsumption in each zone.GROUNDWATER – Assuming 50% of the bore wellsare dry, and the remaining bore wells yielding about1.5lit/sec, with a pumping of 2 hour duration per day
Some best management practices for enhancingdistribution system reliability through maintenanceinclude:1.Regular storage tank inspections and maintenance.2.Implementing a cleaning/ lining program.3.Developing an infrastructure replacement program.4.Instituting a valve and hydrant exercise program.5.Maintaining a leak detection program.6.Implementing a meter repairs/ replacement program.
CONTROLS OF WATER SUPPLY SYSTEMTo reach the target / set point (reservoir flows / levels).To reach the targets as fast as possible.To ensure the smoothest possible operation ofvalves/pumps.To control the slow transients.For real time operation monitored by SCADA.Particularly useful for complex pipe networks.
CLEAN WATER FOR HEALTHY LIVINGCONDITIONTo provide secured and safe waterSECURED – Adequate amount of water.SAFE – Suitable quality is maintained of water. To improve environmental sanitationIncrease sanitation coverage.To increase hygiene and health careImprove quality of water supply sources and storagefacilities.
MANAGEMENT OF TREATED WATER DURINGDISTRIBUTION AND STORAGERegulation for maintaining water quality standards indistribution systems.Maintain minimum residence time.Regular monitoring at storage and other junctions.Flushing and maintenance of storage facilities.