WCP II abbreviated to add to WCP IIII

Question 1

Save water in CII Laundry by doing what?

Answer 1

1. wash full loads only
2. rinse reuse/water treatment continuous batch
3. reduce demand - towel reuse, disposable “linen”
4. newer equipment

Question 2

A 100-room hotel is retrofitting its fixtures to save water. all units are rented every day of the yr. 86 of 100 toilets, installed in 1980 (3.6 gpf), are replaced with 1.6 gpf tmodels. Toilets are used 4xs/day. All 100 SH (1990 - 2.5 gpm) are replace with 1.8 gpm models. Used 2xs each day for 10 mins each time. All 100 faucets (1990-2.5 gpf) are replaced w/1.5 gpm aerators. faucets used 20 mins/day. Five clothes washers (51 gpl) are replace with 27 gpl models. 20% of the rooms will wash one load per day. How many gals of water this hotel save in one yr. How much gallons/year does each changeout save?

Answer 2

Toilets(3.6-1.6)x 86 x 4 x 365 = 251,120 SH(2.5-1.8) x 100 x 2 x 10 x 365 =511,000FA(2.5-1.5) x 100 x 20 x 365 = 730,000 CW(51-27)x.2x100*1*365=3,504,000Total 4,996,120 WRONG!!!

Question 3

CII laundry machines use how much water?

Answer 3

2.5 to 3.5 gals per pound of laundry

Question 4

Give the particle size of each type of soil?

Answer 4

Sand - 0.05-1.0 mm, now runoff but disappears quick

Silt - medium 0.002-0.05 mm

Clay - smallest particle size, 0.002 mm, least permeable, high runoff (

Question 5

Give percentages pf reference ETo fpr WUCOLS?

Answer 5

H - 70-90% EToM - 40-60% EToL - 10-30% EToVL-

Question 6

Types of cool season turf grass.

Answer 6

Cool Season

• fescue, rye grass (perenial/annual)
• Kentucky Blue grass
• Bent grass

Question 7

Types of warm season turf grass?

Answer 7

1. Hybrid Bermuda
2. St Augustine
3. Zoysia grass
4. Buffalo grass

Question 8

A 100-room hotel is retrofitting its fixtures to save water. all units are rented every day of the yr. 86 of 100 toilets, installed in 1980 (3.6 gpf), are replaced with 1.6 gpf tmodels. Toilets are used 4xs/day.All 100 SH (1990 - 2.5 gpm) are replace with 1.8 gpm models. Used 2xs each day for 10 mins each time. All 100 faucets (1990-2.5 gpf) are replaced w/1.5 gpm aerators. faucets used 20 mins/day.Five clothes washers (51 gpl) are replace with 27 gpl models. 20% of the rooms will wash one load per day. How many gals of water this hotel save in one yr.

Answer 8

1. Toilets(3.6-1.6) x 86 x 4 x 365 = 251,120
2. SH(2.5-1.8) x 100 x 2 x 10 x 365 =511,000
3. FA(2.5-1.5) x 100 x 20 x 365 = 730,000
4. CW(51-27) x 0.2x*365=153,300
5. Total 1,896,540

Question 9

What is the cost effectiveness of WC vs. other Resource Options?

Answer 9

Resource OptionAvg Cost/AF

WC$300-$600

Groundwater$250-$650

Surface Water$500-$800

Water Reuse$400-$700

Desal$900-$1,200

Question 10

What percentage is recycled water used?

Answer 10

1. 46% agric irrig
2. 21% landscape irr
3. 14% groundwater recharge
4. 19% all other uses

Question 11

What are some of the proposition funding types? Pg 40

Answer 11

Pop. 13 - 2000 Water Bond

Prop 50 - funding for local water systems

Prop 84 - funding for public water systems

Question 12

What are the monitoring priorities for monitoring WC efforts? pg 55

Answer 12

1. budget
2. water demand
3. production (peak, minimum)
4. drought indicators
5. customer behaviors/attitudes
6. customer actions ( rebates for example)
7. Operations
   
   • water loss
   • rates
   • water waste
8. Water savings analyses

Question 13

Water Rates fixed/variable charges. What are they? pg 65

Answer 13

Fixed charges-portion of water bill which remains the save or fixed regardless of amt of water used

Variable charge- “consumption charge”- rates applies to the amt of water used-water units, energy, zones, pumping

The water rate BMP looks to have more than 60% variable charged

The higher the % of revenue collected from variable, the more responsive demand would be to rate changes

Question 14

What are the rate impacts on water use? pg 69

Answer 14

• City of Davis: 1990 to 2008 - from 230 to 188 GPCD
• Las Vegas valley WD - 2004 SFR was 65 to 39 GPCD
• Largest impact is from non-metering to metering
• Important to identify type of savings:

1. Annual
2. average
3. peak
4. other

Question 15

What is the EWU (Estimated Water Use) for 100 sf cool season lawn in Sacramento? Eto for Sacramento is 52”/yr, EP (effective precipitation) is 4”, plant factor for cool season turf is 0.8 and IE (irrgation efficiency) or districution uniformity is 0.5?

EWU (gals/yr) = (ref Evapotranspiration-Effective Precipitation) *(Plant Factor)*(Lanadacape Area)(0.62- inches rain to gallons)/0.5)

Answer 15

EWU = (Eto-EP)(PF)(LA)(CF)/(IE)

EWU = (52-4) x 0.8 x 100 x 0.623/0.5 = 4,785 gpy

Question 16

What was the result of the CUWCC’s 2007 Landscape Survey Messaging Survey? pg. 81 Started 4:52

Answer 16

• 62% of res customers favor messaging focusing on cost of water to encourage landscape water conservation
• 89% of landscape managers favor messaging focusing on cost of water to encourage landscape water conservation

Question 17

CUWCC 2007 landscape survey landscape manager (commercial) highlights?

Answer 17

• 72% water with sprinklers
• 24% water both w/sprinklers and by hand
• 50% irrigate properties 19 acres or smaller
• 45% irrigate properties 40 acres or larger
• 85% irrigate turf, groundcover, trees, shrubs
• 43% report that >305 sites were landscape

Question 18

Using 2000 WUCOLS II Study tell me about plant water demands? pg 85

Answer 18

• High 70-90% Reference Eto
• Moderate 40-60% Reference Eto
• Low 10-30% Reference Eto
• Very Low <10% Reference Eto