Assessing Geomorphic Change in Support of Science-Based Restoration, Trinity River, CA Completed
Historic landuse, dam construction, water storage and flow diversion within the Trinity River watershed resulted in downstream geomorphic changes that simplified the river planform and lead to dramatic losses of salmonid habitat and significant population declines. The Trinity River Restoration Program (TRRP) requested the USGS complete an assessment of geomorphic change that could be used to inform the Phase 2 planning process for additional restoration work. This project is proposed to conduct a geomorphic assessment of the upper 42 miles of the mainstem Trinity River to quantify geomorphic change related to river restoration actions mandated in 2000 as part of the Mainstem Trinity River Fishery Restoration Final EIS/EIR Record of Decision (USDOI, 2000).
The cumulative influence of restoration actions on river geomorphology will be assessed by quantifying the nature, rate, and extent of geomorphic change throughout the 42-mile TRRP restoration reach during pre and post restoration time periods. Local conditions promoting active alluvial features will be identified and if possible documented changes will be related to both anthropogenic work and natural drivers of geomorphic change.
Activities for this program include: review of existing data ; study plan development; geomorphic mapping using historic aerial photography and topographic surveys; and estimation of the nature, extent and rates of geomorphic change.
Below are publications associated with this project.
Assessing geomorphic change along the Trinity River downstream from Lewiston Dam, California, 1980-2011
Geomorphic mapping to support river restoration on the Trinity River downstream from Lewiston Dam, California, 1980-2011
Below are partners associated with this project.
- Overview
Historic landuse, dam construction, water storage and flow diversion within the Trinity River watershed resulted in downstream geomorphic changes that simplified the river planform and lead to dramatic losses of salmonid habitat and significant population declines. The Trinity River Restoration Program (TRRP) requested the USGS complete an assessment of geomorphic change that could be used to inform the Phase 2 planning process for additional restoration work. This project is proposed to conduct a geomorphic assessment of the upper 42 miles of the mainstem Trinity River to quantify geomorphic change related to river restoration actions mandated in 2000 as part of the Mainstem Trinity River Fishery Restoration Final EIS/EIR Record of Decision (USDOI, 2000).
The cumulative influence of restoration actions on river geomorphology will be assessed by quantifying the nature, rate, and extent of geomorphic change throughout the 42-mile TRRP restoration reach during pre and post restoration time periods. Local conditions promoting active alluvial features will be identified and if possible documented changes will be related to both anthropogenic work and natural drivers of geomorphic change.
Activities for this program include: review of existing data ; study plan development; geomorphic mapping using historic aerial photography and topographic surveys; and estimation of the nature, extent and rates of geomorphic change.
- Publications
Below are publications associated with this project.
Assessing geomorphic change along the Trinity River downstream from Lewiston Dam, California, 1980-2011
The Trinity River Restoration Program, one of the nation’s largest adaptively managed river restoration programs, requires periodic assessment to determine the effectiveness of management actions in restoring channel dynamics and habitat features. This study documents riparian and channel changes along an intensively managed 65-kilometer reach of the Trinity River in California, downstream from LeAuthorsJennifer A. Curtis, Scott A. Wright, Justin Toby Minear, Lorraine E. FlintGeomorphic mapping to support river restoration on the Trinity River downstream from Lewiston Dam, California, 1980-2011
Historic land use, dam construction, water storage, and flow diversions in the Trinity River watershed have resulted in downstream geomorphic change, loss of salmonid habitat, and declines in salmonid populations. The USGS in cooperation with the Trinity River Restoration Program, a multi-agency partnership tasked with implementing federally mandated restoration, completed a geomorphic change asseAuthorsJennifer A. Curtis, Timothy M. Guerrero - Partners
Below are partners associated with this project.