Geomorphology Team

Chinook Salmon and Pacific Lamprey are culturally significant fishes to the Tribal community along the Siletz River, Oregon. The USGS studied how streamflow and bedload conditions may influence mainstem spawning habitats.

The USGS, in cooperation with the U.S. Army Corps of Engineers (USACE), is conducting targeted research to better understand geomorphic conditions and processes within the reservoir at Fern Ridge Lake, near Eugene, Oregon, so that managers have the information to support dam operations and other actions that will aid in the preservation and management of cultural sites.

The Willamette River Basin reflects the conflicting water demands between humans and ecosystems—particularly salmon— and the challenge resource managers face throughout the Pacific Northwest.

The USGS has been studying the Klamath Basin for decades. The USGS provides unbiased data to Tribal partners and resource managers to aid with complex management and conservation efforts.

Assessment of Sedimentation Changes in the Nehelam Bay, Oregon

The USGS has been documenting the geomorphic response to the annual Fall Creek Lake drawdown since 2011.

Assessing channel change, habitat health, and flood hazards across Oregon rivers and streams.

"The goal of this project is to characterize the vertical hydraulic gradient at the sediment-water interface in Upper Klamath Lake."

SPARROW can be used to relate water-quality data to landscape characteristics, such as natural properties and human activities

Sediment fingerprinting has been used successfully to identify land uses that are the major sources of sediment. This study will apply these techniques in a predominantly rural, volcanic landscape.

SELDM facilitates analysis by providing precipitation, pre-storm streamflow, and other variables by region or from hydrologically similar sites.

In 2009, the USGS completed a comprehensive study of gravel transport and storage along the lower Chetco River.