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FLOOD09863
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Last modified
1/26/2010 10:10:54 AM
Creation date
10/5/2006 4:42:25 AM
Metadata
Fields
Template:
Floodplain Documents
County
Boulder
Community
Longmont
Stream Name
St. Vrain Creek
Basin
South Platte
Title
St. Vrain Creek Hydrology
Date
7/10/1985
Prepared For
Boulder County
Prepared By
Engineering Professionals
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br /> <br />~ <br /> <br />. <br /> <br />l',xr!.^11NrTOll 01" D^1'^ :mown on <br />COMPU'l'lm rHIN'I'(JUT "lIEET" D-6 TO D-9 <br /> <br />PLATE D- 6 - Shows a printout of the pror,ram input data required to <br />compute the hydrolor,ic analysis for the dam. <br /> <br />PLATE D-7 - Provides a printout of the llnit hydro(';raph ordinates <br />and the probable maximwn precipitation, loss and runoff values by <br />periods. Rainfall for the period is sho'Jn as the top value in <br />the horizontal rows, 10s5 is shown in the middle row, and runoff <br />is shown in the third row. <br /> <br />PLATE D-8 - Provides a tabulated display of storage elevation curve, <br />outlet ratinl'; curve (not included in all cases), eme!"r,ency spillw"y <br />rating curve, and top of dam rating curve. <br /> <br />PLATE D- 9 - '!'his plate provides a SUllL"lary of information used as <br />input for the hydrologic analysis of the dam and a summary of the <br />reservoir routing results. <br /> <br />SNYDER'S UNIT HYDROGRAPH DATA is shown across the top of the sheet. <br /> <br />THE PROBABLE 11AXI~IDM PRECIPITATION AND RUNOFF display shows the <br />220-square mile index value, the reduction factor (Y~own as the <br />Hopbrook correction), and 6-hour percentages of the factored <br />200-square mile index value, which adjusts the rainfall to the <br />drainage area of the basin. Loss rates and a summary of total <br />rainfall, loss and runoff is also shown. <br /> <br />THE LAKE INFLOW HYDROGRAPH display shows he hydrograph ordinates <br />for the Probable Maximum Flood event. <br /> <br />THE LAKE AND DAM INFORMATION display shows pertinent data associated <br />with the dam and reservoir. <br /> <br />THE FLOOD ROUTING S~{ARY display shows a summary of the results <br />obtained in routing the Probable Maximum Flood and various percentages <br />of this flood through the reservoir. <br /> <br />PLATE D-S ' <br />
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