Evaluation of fall chinook salmon spawning adjacent to the In-Situ Redox Manipulation treatability test site, Hanford Site, Washington
The In Situ Redox Manipulation (ISRM) experiment is being evaluated as a potential method to remove contaminants from groundwater adjacent to the Columbia River near the 100-D Area. The ISRM experiment involves using sodium dithionate (Na{sub 2}O{sub 6}S{sub 2}) to precipitate chromate from the groundwater. The treatment will likely create anoxic conditions in the groundwater down-gradient of the ISRM treatability test site; however, the spatial extent of this anoxic plume is not exactly known. Surveys were conducted in November 1997, following the peak spawning of fall chinook salmon. Aerial surveys documented 210 redds (spawning nests) near the downstream island in locations consistent with previous surveys. Neither aerial nor underwater surveys documented fall chinook spawning in the vicinity of the ISRM treatability test site. Based on measurements of depth, velocity, and substrate, less than 1% of the study area contained suitable fall chinook salmon spawning habitat, indicating low potential for fall chinook salmon to spawn in the vicinity of the ISRM experiment.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States) (US)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 290987
- Report Number(s):
- PNNL-12025; ON:DE99001115; ON: DE99001115; TRN: US0002303
- Resource Relation:
- Other Information: Supercedes report DE99001115; PBD: 2 Oct 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fall Chinook Salmon Spawning Ground Surveys in the Snake River Basin Upriver of Lower Granite Dam, 2004 Annual Report.
Fall Chinook Salmon Spawning Ground Surveys in the Snake River Basin Upriver of Lower Granite Dam, 2005 Annual Report.
Related Subjects
54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRONMENTAL POLLUTANT EFFECTS ON LIVING ORGANISMS AND BIOLOGICAL MATERIALS
HANFORD RESERVATION
REMEDIAL ACTION
GROUND WATER
CHROMIUM
PRECIPITATION
COLUMBIA RIVER
ENVIRONMENTAL IMPACTS
SALMON
HABITAT
OXYSULFIDES
SODIUM COMPOUNDS
FLUID INJECTION
IN-SITU PROCESSING
BASELINE ECOLOGY