A dataset containing total inundated floodplain area in acres as a function of flow in cubic feet per second.

cow_creek_floodplain

Format

dataframe with 30 rows and 3 variables:

flow_cfs

integer flow value in cubic feet per second

FR_floodplain_acres

fall run floodplain acreage

ST_floodplain_acres

steelhead floodplain acreage

watershed

name of watershed

Source

Scaled from a Deer Creek flow to floodplain area relationship generated with a 1D HEC-RAS hydraulic model

Fall Run Modeling

No site-specific hydraulic modeling was available for this watershed. A flow to floodplain area relationship was generated for this watershed by scaling the flow to floodplain area relationship for Deer Creek based onhydrologic and geomorphic analyses. Flows and corresponding floodplain areas per unit length were calculated for this watershed as 2.16 percent of DeerCreek values based on the ratio of mean flow from December to June between this watershed and Deer Creek. Of the entire mapped 64.17 mile rearing extent in this watershed, 8.59 miles were classified as low gradient and 55.58 miles were classified as high gradient based on a geomorphic analysis. A scaling factor of 0.1 was applied to the area per unit length for the high gradient extent. No scaling factor was applied to the low gradient extent.

Steelhead Modeling

No site-specific hydraulic modeling was available for this watershed. A flow to floodplain area relationship was generated for this watershed by scaling the flow to floodplain area relationship for Deer Creek based onhydrologic and geomorphic analyses. Flows and corresponding floodplain areas per unit length were calculated for this watershed as 2.16 percent of DeerCreek values based on the ratio of mean flow from December to June between this watershed and Deer Creek. Of the entire mapped 94.19 mile rearing extent in this watershed, 8.59 miles were classified as low gradient and 85.60 miles were classified as high gradient based on a geomorphic analysis. A scaling factor of 0.1 was applied to the area per unit length for the high gradient extent. No scaling factor was applied to the low gradient extent.

Examples

cow_creek_floodplain
#> flow_cfs FR_floodplain_acres ST_floodplain_acres watershed #> 1 150.9354 0.000000 0.000000 Cow Creek #> 2 366.5575 0.000000 0.000000 Cow Creek #> 3 582.1796 0.000000 0.000000 Cow Creek #> 4 797.8017 0.000000 0.000000 Cow Creek #> 5 1013.4237 0.000000 0.000000 Cow Creek #> 6 1229.0458 0.000000 0.000000 Cow Creek #> 7 1231.2020 0.000000 0.000000 Cow Creek #> 8 1444.6679 0.000000 0.000000 Cow Creek #> 9 1660.2899 0.000000 0.000000 Cow Creek #> 10 1875.9120 6.383165 7.737547 Cow Creek #> 11 2091.5341 18.745913 22.723428 Cow Creek #> 12 2307.1562 29.115228 35.292909 Cow Creek #> 13 2522.7782 40.267350 48.811293 Cow Creek #> 14 2738.4003 50.127678 60.763789 Cow Creek #> 15 2954.0224 60.641644 73.508613 Cow Creek #> 16 3169.6444 70.567240 85.540225 Cow Creek #> 17 3385.2665 80.168994 97.179283 Cow Creek #> 18 3600.8886 88.411124 107.170232 Cow Creek #> 19 3816.5107 96.300529 116.733614 Cow Creek #> 20 4032.1327 103.721679 125.729387 Cow Creek #> 21 4247.7548 110.272899 133.670647 Cow Creek #> 22 4463.3769 117.172674 142.034420 Cow Creek #> 23 4678.9989 122.548582 148.550990 Cow Creek #> 24 4894.6210 127.958613 155.108924 Cow Creek #> 25 5110.2431 132.646402 160.791369 Cow Creek #> 26 5325.8652 137.776719 167.010238 Cow Creek #> 27 5541.4872 142.734276 173.019692 Cow Creek #> 28 5757.1093 147.582318 178.896394 Cow Creek #> 29 5972.7314 152.209125 184.504919 Cow Creek #> 30 6188.3534 155.926460 189.010999 Cow Creek