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High-resolution orthophotograph of Fall Creek Lake, Oregon, acquired during annual drawdown to streambed November 9, 2016

Metadata Updated: July 6, 2024

The Middle Fork Willamette River basin encompasses 3,548 square kilometers of western Oregon and drains to the mainstem Willamette River. Fall Creek basin encompasses 653 square kilometers and drains to the Middle Fork Willamette River. In cooperation with the U.S. Army Corps of Engineers, the U.S. Geological Survey evaluated geomorphic responses of downstream river corridors to annual drawdowns to streambed at Fall Creek Lake. This study of geomorphic change is focused on the major alluvial channel segments downstream of the U.S. Army Corps of Engineers’ dams on Fall Creek and the Middle Fork Willamette River, as well as the 736 hectare Fall Creek Lake. Reservoir erosion during streambed drawdown results in sediment delivery to downstream reaches. To better understand patterns and processes of reservoir erosion related to downstream geomorphic responses, detailed reservoir deposit mapping and change analyses are completed. To support these analyses, aerial photographs were collected via unmanned aerial systems (UAS) on November 8 and November 9, 2016, and via Cessna aircraft (or manned aerial system; MAS) on November 10, 2016, to create 3-dimensional xyz point clouds, digital elevation models (DEMs), and orthophotographs of the Fall Creek Lake bottom during full reservoir drawdown using structure-from-motion (SfM) techniques. The November 8 model resulted in a ground resolution of 3.28 centimeters per pixel, average point density of 58.2 points per square meter, and DEM resolution of 13.1 centimeters per cell. The November 9 model resulted in a ground resolution on 2.86 centimeters per pixel, average point density of 76.6 points per square meter, and DEM resolution of 11.4 centimeters per cell. The model for the manned aerial system (MAS) flight on November 10 had a slightly lower ground resolution at 4.18 centimeters per pixel (for multiple altitudes), average point density of 35.8 points per square meter, and output DEM resolution of 16.7 centimeters per cell. Cell sizes were automatically generated by the software. This documentation describes the high-resolution orthophotograph of Fall Creek Lake, Oregon, created from aerial photographs acquired when lake levels at streambed on November 9, 2016. This dataset is part of a broader publication including aerial photographs, 3-dimensional xyz point clouds, DEMs, orthophotographs, model processing reports, ground control points, and dataset footprints for November 8-10, 2016.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Maintainer
@Id http://datainventory.doi.gov/id/dataset/b3d5f48ee3a3568c7231d57f68b5892f
Identifier USGS:5dfd4f15e4b0b207aa00a15e
Data Last Modified 20200827
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://datainventory.doi.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 9a43fb2f-bbd8-41d2-a17e-4f1a667e7393
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -122.760039,43.936134,-122.722641,43.954155
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash a4fbe10dd08084a91839ab00894a06bae49437dadd8c37c0dbc816c72206176c
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -122.760039, 43.936134, -122.760039, 43.954155, -122.722641, 43.954155, -122.722641, 43.936134, -122.760039, 43.936134}

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