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Last modified
8/11/2009 11:41:47 AM
Creation date
9/30/2006 10:16:33 PM
Metadata
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Publications
Year
1998
Title
Denver Basin and South Platte River Basin Technical Study: Technical Addendum 1 and 2
Author
Special Water Committee
Description
Technical addendums for the report
Publications - Doc Type
Tech Report
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Chapter 1: South Platte Basin Inventory <br /> <br />March 21,1998 <br />Page 1-5 <br /> <br />We believe that the error represented by Denver's use of historical Plum Creek <br />gage data as part of this natural flow estimate is insignificant, given that historical <br />depletions above the Plum Creek gage result from irrigation of less than 2,000 acres <br />and very small amounts of domestic and municipal use. We believe that Denver's <br />estimates for this location are the best available data and are satisfactory for the <br />purposes of this study. We have therefore adopted Denver's natural flow estimates for <br />this gage location without adjustment. Natural flows estimates for the South Platte <br />below Chatfield gage location are presented in Table 1-2 and Figure 1-2. <br /> <br />1,1,2.3 South Platte at Denver <br /> <br />For this gage location we once again relied on Denver's natural flow estimates <br />for PACSM. To develop natural flow estimates for this location, Denver used the <br />following general equation: <br /> <br />South Platte at Denver natural flow = <br />South Platte at South Platte natural flow + <br />Plum Creek at Louviers historical gage flow + <br />Bear Creek at Morrison historical gage flow + <br />Cherry Creek Below Cherry Creek Lake gage flow + <br />(natural stream gains for the Metro stream reach between South Platte at South <br />Platte gage and South Platte at Denver gage) <br /> <br />Denver quantified the natural stream gains for the Metro stream reach between <br />the South Platte and Denver gages via mass balance analysis using daily data for <br />stream flows, di'lersions, wastewater and power plant discharges, changes in resel'loir <br />storage and resel'loir evaporation within this reach. <br /> <br />We believe that the error represented by Denver's use of historical gage data for <br />Plum Creek, Bear Creek and Cherry Creek as part of this natural flow estimate is <br />insignificant, gi'len that the combined historical depletions in these tributaries consist of <br />less than 5,000 acres of irrigation and very small amounts of domestic and municipal <br />use, We believe that Denver's estimates for this location are the best available data <br />and are satisfactory for the purposes of this study. We have therefore adopted <br />Denver's natural flow estimates for this gage location without adjustment. Natural flows <br />estimates for the South Platte at Denver gage location are presented in Table 1-3 and <br />Figure 1-3. <br /> <br />Hydrosphere Resource Consultants. 1002 Walnut Suite 200, Boulder, CO 80302 <br />
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