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Last modified
1/26/2010 2:22:29 PM
Creation date
10/12/2006 1:35:43 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8056
Description
Drought Preparedness
State
CO
Basin
Statewide
Date
6/1/1988
Author
Washington State DSH
Title
Guidelines for the Preparation of Water Shortage Response Plans
Water Supply Pro - Doc Type
Report/Study
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<br />M1~/'!3 <br /> <br />b. Peak Use <br /> <br />Remember to a=ount for seasonal peak use col1SUIlption. In Washington, peak <br />water col1SUIlption occurs from mid.,:ruly through the fall when irrigation <br />and outdoor water use are at their highest levels. Peak water use is <br />approximately two and one-half times non-peak use. <br /> <br />Analysis of past col1SUIlption records, or using one of the estimation methods <br />listed above, should enable a utility to determine cu=ent col1SUIlption. <br /> <br />1\tlRKSHEET 1 <br />current Water CoIlSUl\iltion <br /> <br />1... Water Demand Factors <br /> <br />a. Growth Demand <br /> <br />Before water demand can be projected, it is inqJortant to a=unt for the <br />growth that is likely to take place within your service area rn the next <br />twelve months. To find out how much growth is expected, refer to city or <br />county land use plans and to population projections. Estimate the <br />additional numbers of gallons required for each new residential service <br />and new large user. Add these numbers together to derive total demand. Add <br />this total to last year's total consumption (whether metered or estimated) . <br /> <br />b. Drought Factor <br /> <br />Another factor affecting water col1S1.lllption is prolonged hot, d1:y weather. <br />Past experience shows that utilities facing a drought see an rncrease of <br />about five percent over normal water consumption during those months <br />affected by the drought. If a hot, d1:y weather pattern settles over your <br />region, you may want to project a five percent increase over normal water <br />consumption for the projected duration of the drought. Even if the hot, <br />d1:y weather does not continue, you will have a realistic "worst case" <br />scenario. <br /> <br />1- 1\tlRKSHEET 2 <br /> <br />~ DBnan~ Factors <br /> <br />.4.... Water Demand Proiections <br /> <br />When projecting future water demand, make sure that past and future time <br />periods are equivalent. If projecting demand for one year, use a year's <br />worth of col1SUIlption data. If projecting "peak use" demand, use the most <br />recent col1SUIlption data for the equivalent time period. <br /> <br />9 <br /> <br /> <br />'" <br />
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