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SPDSS_Task66-2_CollectDevelopMunicipalIndustrialConsumptiveUseEstimates
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SPDSS_Task66-2_CollectDevelopMunicipalIndustrialConsumptiveUseEstimates
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Last modified
4/17/2013 9:37:33 AM
Creation date
5/27/2008 11:34:13 AM
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Decision Support Systems
Title
SPDSS Task 66.2 - Collect and Develop Municipal and Industrial Consumptive Use Estimates
Description
This memorandum presents the general approach used to develop municipal and industrial consumptive use for the CU and Losses Summary Report and estimate indoor and outdoor water demands, consumptive use, and return flows for SPDSS modeling efforts.
Decision Support - Doc Type
Task Memorandum
Date
11/14/2007
DSS Category
Consumptive Use
DSS
South Platte
Basin
South Platte
Contract/PO #
C153954
Grant Type
Non-Reimbursable
Bill Number
SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
Prepared By
Leonard Rice Engineering
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The ratio of the total water demand attributable to in-house uses averages about 56 percent for <br />the municipalities with the remaining 44 percent attributed to outside demand. The average <br />estimate excludes the City of Boulder data point (66 percent in-house demand) and City of Black <br />Hawk data point (85 percent in-house demand). The in-house demand percentage in Boulder is <br />higher than most other municipalities in the basin due to the City of Boulder's compact layout, as <br />noted in the Task 5 Memorandum on the City of Boulder. The in-house demand for Black Hawk <br />is attributable to the very high level of commercial water demands associated with gaming <br />operations. Therefore, Boulder's and Black Hawk's in-house :outside demand ratios are not <br />considered representative of the SPDSS study area. <br />The 56/44 percent split is considered appropriate for all non-key municipalities and <br />unincorporated areas within the SPDSS study area. This ratio is recommended for future SPDSS <br />modeling efforts with the provision that specific user information (e.g., City of Boulder and other <br />key municipalities) can be substituted for average values. <br />It is recommended that in-house demands be modeled in SPDSS as constant over the year <br />(annual in-house demand / 12). Outside demands should be distributed based on representative <br />average monthly bluegrass crop irrigation water requirements. The recommended distribution for <br />outside uses, for the basin as a whole, is presented in Table 4 and illustrated in Figure 4. <br />Table 4 <br />Monthly Distribution of Municipal Outdoor Water Uses <br />Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total <br />0% 0% 0% 9.0% 15.3% 18.8% 19.9% 17.3% 12.8% 6.9% 0% 0% 100.0% <br />Note: Irrigation water requirement for bluegrass at the Greeley weather station. <br />5,000 <br />4,500 <br />4,000 <br />w 3,500 <br />R <br />C <br />•= 3,000 <br />L <br />7 <br />A 2,500 <br />s <br />a <br />0 <br />~ 2,000 <br />en <br />R <br />y~ 1,500 <br />1,000 <br />500 <br />Figure 4 <br />Typical Municipal Water Demands <br />^ In-House Demands i Total Demands <br />Task 66.2 Memorandum.doc Page 11 of 26 <br />Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct <br />
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