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Water Conservation Update

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  • 1. RA Kaiser J Totten CP Khedun AC Lewis J Nations V Garcia, Jr. A Landon LC Sansom J Andrus
  • 2. COLLEGE STATION WATER USE Residential Customers: 22,000 customers Average Summer daily use total: 20 million gal/day Total Service Area Population: 85,000 Water conservation practices: Block rates, reuse, irrigation check up, water waste restrictions, rain barrel rebate, educational information
  • 3. PROMOTING EFFICIENCY/REDUCE LAWN OVERWATERING: 2011 TO 2013.  50-55% of annual residential use is outdoor watering  City use • Winter average about 8-9 mgd • Summer average about 20 mgd  Residential customers • Winter: 7,500 g/month • Summer: 20,000+g/m  TARGET AUDIENCE • Residential customers using over 100,000 gallons (less winter use) for summer months  About 5,500 customers in 18 neighborhoods/40% of water use
  • 4. COMPUTING WATER BUDGETS  Data Source • Monthly water use records from College Station Water Utilities • Irrigation Area: Lot size, less building footprint from Brazos Appraisal District • Texas ET Network potential evapotranspiration (PET) data • NWS rainfall data  Estimated monthly indoor water use • Estimate average winter consumption (AWC) • AWC = Average of three lowest winter months [November – February]  Summer water consumption (SWC) [April – September] for each household • SWC = Monthly Usage − AWC
  • 5. CALCULATING LANDSCAPE WATER BUDGET Water budget (gallons)= irrigation area(sq. ft.) x crop coefficient x PET (in)-rainfall (in) x 0.6 g/sq. ft.
  • 6. A SAMPLE IRRIGATION AREA  Sample lot • Parcel Area: 21,780 ft2 • Living Area: 2,377 ft2 • Building Area: 4,083 ft2 • Driveway Area: 2,440 ft2 • Irrigation Area: 15,257 ft2
  • 7. WATER BUDGET FOR SAMPLE LOT 2012 Total Water Use 45,000 40,000 35,000 Gallons 30,000 25,000 20,000 15,000 10,000 5,000 0 April May Irrigation June Coefficient Method July August GIS Method September
  • 8. EXAMPLE OF UNDER BUDGET  ACTUAL RESIDENT SUMMER 2012 CONSUMPTION
  • 9. Gallons Thousands CHANGE IN CONSUMPTION PATTERN: 2010-2013 80 AN EDUCATED CUSTOMER 60 40 20 0 -20 2010 2011 2012 2013
  • 10. EXAMPLE OF OVER BUDGET  ACTUAL RESIDENT SUMMER 2012 CONSUMPTION EQUIVALENT TO 2/3 FT. OF WATER OVER THE LOT KYLE FIELD WITH 1” OF WATER
  • 11. STUDY NEIGHBORHOODS 5,570 LOTS 40% OF TOTAL RESIDENTIAL WATER USE
  • 12. Gallons Millions CONSUMPTION EFFICIENCY-5,500 CUSTOMERS IN ALL NEIGHBORHOODS 250 80% 70% 200 60% 50% 150 40% 100 30% 20% 50 10% 0 0% 2010 Total Amount Over 2011 2012 2013 Percentage of Customers Who Overwatered
  • 13. NEXT YEAR  Information on weekly water budgets • ET network • Rainfall by sectors of city • Send weekly watering reports to customers/ TV station announcement  Application of new technology • Rainfall controller shut off • Soil moisture controller shut off.
  • 14. Thank You Dave Coleman