RA Kaiser
J Totten
CP Khedun

AC Lewis
J Nations
V Garcia, Jr.

A Landon
LC Sansom
J Andrus
COLLEGE STATION WATER USE
Residential Customers: 22,000 customers

Average Summer daily use total: 20 million gal/day
Tota...
PROMOTING EFFICIENCY/REDUCE LAWN
OVERWATERING: 2011 TO 2013.


50-55% of annual residential use is outdoor watering



C...
COMPUTING WATER BUDGETS


Data Source
• Monthly water use records from College Station Water Utilities
• Irrigation Area:...
CALCULATING LANDSCAPE WATER
BUDGET

Water budget (gallons)= irrigation area(sq. ft.) x crop coefficient x PET
(in)-rainfal...
A SAMPLE IRRIGATION AREA
 Sample lot
• Parcel Area:

21,780 ft2

• Living Area:

2,377 ft2

• Building Area: 4,083 ft2

•...
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...
EXAMPLE OF UNDER BUDGET


ACTUAL RESIDENT SUMMER
2012 CONSUMPTION
Gallons

Thousands

CHANGE IN CONSUMPTION PATTERN: 2010-2013
80

AN EDUCATED
CUSTOMER

60
40
20
0
-20
2010

2011

2012

20...
EXAMPLE OF OVER BUDGET


ACTUAL RESIDENT SUMMER
2012 CONSUMPTION

EQUIVALENT TO
2/3 FT. OF WATER
OVER THE LOT
KYLE FIELD ...
STUDY NEIGHBORHOODS

5,570 LOTS
40% OF TOTAL
RESIDENTIAL WATER USE
Gallons

Millions

CONSUMPTION EFFICIENCY-5,500 CUSTOMERS
IN ALL NEIGHBORHOODS
250

80%
70%

200

60%
50%

150

40%
100

3...
NEXT YEAR


Information on weekly water budgets
• ET network
• Rainfall by sectors of city
• Send weekly watering reports...
Thank You
Dave Coleman
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Water Conservation Update

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Water Conservation Update

  1. 1. RA Kaiser J Totten CP Khedun AC Lewis J Nations V Garcia, Jr. A Landon LC Sansom J Andrus
  2. 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. 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. 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. 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. 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. 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. 8. EXAMPLE OF UNDER BUDGET  ACTUAL RESIDENT SUMMER 2012 CONSUMPTION
  9. 9. Gallons Thousands CHANGE IN CONSUMPTION PATTERN: 2010-2013 80 AN EDUCATED CUSTOMER 60 40 20 0 -20 2010 2011 2012 2013
  10. 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. 11. STUDY NEIGHBORHOODS 5,570 LOTS 40% OF TOTAL RESIDENTIAL WATER USE
  12. 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. 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. 14. Thank You Dave Coleman

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