FLOOD00720

• County: Jefferson
• Community: Buffalo Creek
• Title: Regional Storm Frequency Analysis
• Date: 4/22/1997
• Prepared For: Jefferson County
• Prepared By: David Diller
• Floodplain - Doc Type: Floodplain Report/Masterplan

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LIST OF TABLES
Table I. Measures ofHeterogeneity............................................_................... 22

Table 2. Comparison ofregional distrib11tions.................................................. 25

Table 3. Estimated Quantiles............................................................................ 26

Table 4. One hour precipitation totals............................................................. 31

LIST OF FIGURES

Figure I Comparison ofrainfall depths.................................................... ........... 12
Figure 2 Dispersion ofL-moment ratios............................................................. 21
Figure 3 Distribution data fit........ ........... ..................................................... 24
Figure 4 Comparison of flood quantiles........................................................ 27
Figure 5 Fifteen minute rainfall distributions.............................................. 30
Figure 6 Comparison of rainfall quantiles........................ ........................... 31
Figure 7 Average rainfall hyetograph.................................................................. 35
Figures 8 - II Sensitivity of variables. ................................................................. 36
Figure 12 Peak flows with corresponding curve number....................................... 38
Figure 13 Peak flow verses rainfall...................... ................................................ 38
Figure 14 Observed verses simulated flows......... ................................................ 40
Figure IS Comparison of quantiles....................................................................... 42

List of Maps

Map I. Location map........... ...................................... .................... ................ 3
Map 2. Location of24 hour raingages................................................................. 19
Map 3. Location of IS minute recording raingages.................................. ........... 29