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Last modified
1/25/2010 6:27:46 PM
Creation date
10/4/2006 11:54:18 PM
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Floodplain Documents
County
Statewide
Community
State of Colorado
Basin
Statewide
Title
Procedure for Hazard Determination
Date
8/31/1984
Prepared By
Colorado Office of the Engineer
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />For the example of Worksheet W-2 these values are: <br /> <br />Time 9!.i CFS <br />0.0 QrO = C3Ql = 0 <br />0.8 Qrl .. C3Q2 ... C2Ql .. 1117 <br />1.6 Qr2 = C3Q3 ... C2Q2 ... ClQl .. 4467 <br />2.4 Qr3 = C3Q4 ... C2Q3 ... CIQ2 .. 8933 <br />3.2 Qr4 = C3Q5 ... C2Q4 ... ClQ3 .. 11167 <br />4.0 Qr5 .. C3Q6 ... C2Q5 ... CIQ4 = 8933 <br />4.8 Qr6 .. C3Q7 ... C2Q6 ... ClQ5 .. 4467 <br />5.6 Qr7= ... C2Q7 ... C1Q6 . 1117 <br />6.4 Qr8= ... CIQ7 = 0 <br /> <br />Figure 5 shows the relationship between the original failure hydrograph and <br /> <br />the routed hydrograph at the critical section. <br /> <br />cfs poool <br /> <br />5 <br /> <br /> <br />Op=13400 <br />QR= 11167 <br /> <br />10 <br /> <br />Hrs <br /> <br />5 <br /> <br />6 <br /> <br />7 <br /> <br />FIGURE 5 <br />, HYDRciGRAPH COI-IPARlSON, BEFORE AND AFrER ROlITING <br /> <br />In most cases it is not necessary to fully create the routed hydrograph, as <br /> <br /> <br />long as its peak value can be determined. For the example: <br /> <br />Qr maximum .. Qr4 = 11,167 cfs <br /> <br />'by multiplication of the maximum values of the two vectors. This term is <br />designated as <br />QR. .. Maximum I Qj Ci <br /> <br />at the bottom of Worksheet W-2 <br /> <br />14 <br />
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