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<br />Table 3. Subbasin characteristics, modeling parameters, and computed peak discharge for long-term subbasin
<br />conditions after 5 years of post-burn recovery, Willow Creek.
<br />[mi', square miles; %, percent; Qn, n-year discharge; ft'/s, cubic feet per second]
<br />Basin name and number Drainage Runoff Initial Lag time 010 050 0100 0500
<br /> area (mi2) curve abstraction (minutes) (ft'/s) (ft'/s) (ft'/s) (ft'/s)
<br /> number
<br />Willow I 9.993 70.87 0.82 1.79 10.6 189.9 329 802
<br />Willow 2 1.182 67.49 0.96 0.73 0.0 27.3 55 156
<br />Willow 3 1.260 68.15 0.94 0.87 0.0 27.7 54 151
<br />Willow 4 1.892 76.62 0.61 0.63 1.6 209.6 311 621
<br />Willow 5 1.604 67.26 0.97 1.07 0.0 24.6 51 148
<br />Willow 6 1.790 71.67 0.79 Ll2
<br />Willow 6a' 0.89 71.67 0.79 Ll2 2.4 30.3 51 120
<br />Willow 6b' 0.60 71.67 0.79 Ll2 1.6 20.4 34 81
<br />Willow 6c' 0.30 71.67 0.79 Ll2 0.8 10.2 17 40
<br />Design point 1 10.6 194.6 338 829
<br />Design point 2 11.5 207.2 360 882
<br />Design point 3 11.5 210.2 366 899
<br />Design point 4 11.7 213.6 372 914
<br />Design point 5 45.8 214.2 373 916
<br />Design point 6 46.1 220.0 374 918
<br />Design point 7 45.7 242.6 377 923
<br />Willow Creek at mouth 17.72 45.7 242.6 377 923
<br />'fraction of subbasin 6, to better represent inflows in hydrologic and hydraulic model
<br />
<br />References
<br />
<br />Browning, T.W., 2001, Guidelines for determining 100- Year flood flows for approximate
<br />floodplains in Colorado, version 5.0 (draft): Colorado Water Conservation Board,
<br />Denver, CO, 37 p.
<br />
<br />Elliott, J.G., Smith, M.E., Friedel, MJ., Stevens, M.R, Bossong, C.R, Litke, D.W.,
<br />Parker, RS., Costello, C., Wagner, J., Char, SJ., Bauer, M.A., and Wilds, S.R, 2005,
<br />Analysis and mapping of post-fire hydrologic hazards for the 2002 Hayman, Coal
<br />Seam, and Missionary Ridge wildfires, Colorado: U.S. Geological Survey Scientific
<br />Investigations Report 2004-5300, 104 p.
<br />
<br />Federal Emergency Management Agency, 1978, Flood insurance study, Alamosa county,
<br />Colorado (unincorporated areas).
<br />
<br />Federal Emergency Management Agency, 1979, Flood insurance study, Archuleta
<br />county, Colorado (unincorporated areas).
<br />
<br />Federal Emergency Management Agency, Flood insurance study, City of Monte Vista,
<br />Colorado.
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