columbia river overview superfund process conceptual site models data gap analysis
DESCRIPTION
Columbia River Overview Superfund Process Conceptual Site Models Data Gap Analysis. Columbia River Surface Water Hydrology Plays a Critical Role in Sedimentation. Flow rates High flows within the Hanford section results in minimum sedimentation Major river confluences Yakima Snake - PowerPoint PPT PresentationTRANSCRIPT
▀ Columbia River Overview▀ Superfund Process
▀ Conceptual Site Models▀ Data Gap Analysis
Columbia River Surface Water Hydrology Plays a Critical Role in Sedimentation
▀ Flow rates ▀ High flows within
the Hanford section results in minimum sedimentation
▀ Major river confluences ▀ Yakima▀ Snake ▀ Walla Walla
S S
S SS
S
SS
S
S
S
The Majority of the Hanford Reach is a Non-Depositional Area
S S
S SS
S
SS
S
S
S
The Majority of the Hanford Reach is a Non-Depositional Area
USGS Annual Statistics
Average Flow (cfs)
Suspended Load (Kg/m3)River
0.063,512Yakima
0.01654,830Snake
0.00375117,480Columbia (Priest Rapids Dam)
568
2366
1188
EstimatedSuspended
Sediment Load (tons/day)
Yakima
Snake
Walla Walla
Columbia
Flow average 117,480 cfs (1188 tons/day)
Columbia
Yakima
Walla WallaFlow average 54,830 cfs
(2,366 tons/day)
Snake
Snake
Columbia
Walla Walla
Flow average 13,512 cfs (568 tons/day)
Yakima
Yakima
Snake
Columbia
Flow average 568 cfs
Walla Walla
McNary Dam currently has approximately 30ft of sediment
▀ Average Annual Deposit Rate is 2 to 7 in/yr
200019901980197019601950
Est. 30 ftSediment}
90 ftWater
Conceptual
Exposure Model
Primary Sources
Medium of Concern
Exposure Point
Potential Exposure Route
Potential Receptors
Rural Residents
Native American
Industrial Worker
Monument Worker
Avid Angler
Casual User
Ecological Receptors
Area 100/300
Sediment Near shore and islands
Ingestion
Dermal Contact
Surface water
River water Ingestion
Dermal Contact
What is a CEM? ▀ Sources ▀ Migration pathways ▀ Receptors ▀ Exposures
Sources of Contaminants to the River
▀ Upriver Sources ▀ Hanford Reach Sources▀ Downriver Sources
Generic Hanford Conceptual Site Model
Historic coolingwater discharge
GW seepsReactors/OperationalAreas
Conceptual Site Model – Cross Section
Cross section illustrates:▀ Sources ▀ Migration pathways ▀ Receptors: people, benthic, fish, etc.▀ Potential Exposure Points
Receptors Source
Cooling water
Columbia River
Site Conceptual Model – Recreational IslandsReceptors Source
Cooling water
Columbia RiverColumbia River
Conceptual Site Model – Richland Area
Agriculture Beach
Industry HouseIndustrial discharge
Water IntakeStructure
Water supplyWater supplyColumbia River
Irrigation discharge
Columbia River
West East
CRC Study Area
Study Area Cross-Section
Hanford Site
100/300 Study Areaand Inter-Area
Green line