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Areas of uncertainty for flood inundation extents at gage 14211500, Johnson Creek near Sycamore, Oregon (sycor_breach.shp)

Dates

Publication Date
Time Period
2010-11-26
Time Period
2014-07-09
Time Period
2014-09-07

Citation

​Stonewall, A.J., and Beal, B.A., 2017, Flood inundation mapping data for Johnson Creek near Sycamore, Oregon: U.S. Geological Survey data release, https://doi.org/10.5066/F75X273G.

Summary

​The basis for these features is U.S. Geological Survey Scientific Investigations Report 2017-5024 Flood Inundation Mapping Data for Johnson Creek near Sycamore, Oregon. The domain of the HEC-RAS hydraulic model is a 12.9-mile reach of Johnson Creek from just upstream of SE 174th Avenue in Portland, Oregon, to its confluence with the Willamette River. Some of the hydraulics used in the model were taken from Federal Emergency Management Agency, 2010, Flood Insurance Study, City of Portland, Oregon, Multnomah, Clackamas, and Washington Counties, Volume 1 of 3, November 26, 2010. The Digital Elevation Model (DEM) utilized for the project was developed from lidar data flown in 2015 and provided by the Oregon Department of Geology and Mineral [...]

Contacts

Point of Contact :
Adam J. Stonewall or Information Officer
Originator :
Adam J. Stonewall, Ben A. Beal
Metadata Contact :
Tana Haluska
Publisher :
U.S. Geological Survey
Distributor :
ScienceBase Team

Attached Files

Click on title to download individual files attached to this item.

Shapefile: sycor_breach.zip
sycor_breach.CPG 5 Bytes
sycor_breach.dbf 866 Bytes
sycor_breach.prj 425 Bytes
sycor_breach.sbn 188 Bytes
sycor_breach.sbx 116 Bytes
sycor_breach.shp 12.1 MB
sycor_breach.shx 164 Bytes

Purpose

The sycor_breach.shp shapefile represents areas of uncertainty for the modeled flood inundation extents of a 12.9 mile reach of Johnson Creek from just upstream of SE 174th Avenue in Portland, Oregon to the confluence with the Willamette River. These areas of uncertainty are for flows of 800 to 3,080 cfs at the gage 14211500, Johnson Creek near Sycamore, Oregon, and will be used on the U.S. Geological Survey Flood Inundation Mapper website.

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