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FLOOD04833
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Last modified
1/29/2010 10:11:55 AM
Creation date
10/5/2006 1:04:38 AM
Metadata
Fields
Template:
Floodplain Documents
Designation Number
421
County
Arapahoe
Adams
Community
Aurora
Stream Name
Upper Box Elder Creek
Basin
South Platte
Title
Hydrology Report - Upper Box Elder Creek Outfall Systems Planning Study
Date
3/1/1994
Prepared For
UDFCD
Prepared By
CH2MHILL
Floodplain - Doc Type
Floodplain Report/Masterplan
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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 />3.7.4 Routing Connectivity <br /> <br />The routing connectivity of the conveyance elements, design points, and subwatershed <br />hydrographs was incorporated into the UDSWM2 models according to the connectivity <br />diagrams provided in Appendix L. <br /> <br />3.8 Results <br /> <br />3.8.1 Peak Flows, Hydrographs, <br />and Runoff Volumes <br /> <br />The peak discharges for the 2-, 5-, 10-, 50-, 100-, and 500-year events for existing and <br />future development conditions are summarized in Appendix M. Plots of the peak dis- <br />charges versus stream station are provided in Appendix N. In addition, hydrographs and <br />runoff volumes for all storms are provided at selected locations in Appendices 0 and P. <br />The information shown in Appendices M through P was organized so that it only includes <br />hydrologic results pertaining to the appropriate area adjustment shown in Table 3-2. <br /> <br />Hydrologic results for the watershed upstream of the study area were not included in <br />Appendices M through P. This is because the upstream model was designed for the <br />specific purpose of generating inflow hydrographs to the study area. To provide <br />representative discharges at certain design points within the upstream watershed, addi- <br />tional subwatersheds may need to be defined and different area adjustments may need to <br />be analyzed. <br /> <br />One-hundred year peak discharges at selected locations along Box Elder Creek are shown <br />in Table 3-4. <br /> <br /> Table 34 <br /> lOO-Year Peak Disdwges at Seleded Locations <br /> lOO-Year Peak Discharges (cfs) <br /> Existing Development Future Development <br /> Location Conditions Conditions <br /> Box Elder Creek <br />Upstream Study Limit 8,960 11,200 <br />1-70 8,900 12,000 <br />Immediately Upstream of 8,840 11 ,900 <br />Coyote Run <br />Immediately Downstream of 9,140 15,200 <br />Coyote Run (Downstream Study <br />Limit) <br /> Coyote Run <br />1-701U.S. 36 6.950 11 ,600 <br />Immediately Upstream of Box 8,630 14,400 <br />Elder Creek Confluence <br /> <br />DENJOOI5J86.WPS <br /> <br />3-8 <br />
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