Anticipated soil selenium concentrations at Kesterson Reservoir

Technical Report · Thu Oct 01 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/6182082· OSTI ID:6182082

Benson, S M; Tokunaga, T K; Zawislanski, P

Temporal trends from soil monitoring data collected at Kesterson Reservoir have been reviewed to shed light on anticipated concentrations of total and water-extractable selenium in surface and subsurface soils. Based on these data, a mass balance model for selenium has been developed and employed to evaluate the rate of leaching, remobilization and volatilization that has occurred since the Reservoir was dried out in 1987. Results from a series of calibration runs were then extrapolated 25 years in the future to forecast the evolution and redistribution of selenium within the soil profile. Projected water-extractable selenium concentrations within the 0.15 to 1 m depth interval were then used to drive a food-chain based risk-assessment model described in a separate report (CH2M Hill, 1992). Inventories of water-extractable selenium in the root zone increased in 4 of the 5 scenarios investigated. However, predicted values for the average concentration of water-extractable selenium in the root zone fall within the range of values observed at Kesterson today. Consequences of these projected increases on wildlife residing in and around Kesterson are addressed in CH2M Hill (1992).

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: DOI; Department of the Interior, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6182082
• Report Number(s): LBL-33080; ON: DE93015226
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
AQUATIC ECOSYSTEMS
BIOGEOCHEMISTRY
CALIFORNIA
CHEMISTRY
CONTAMINATION
DATA BASE MANAGEMENT
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
ECOSYSTEMS
ELEMENTS
GEOCHEMISTRY
MANAGEMENT
NORTH AMERICA
RISK ASSESSMENT
SEDIMENTS
SELENIUM
SEMIMETALS
SURFACE WATERS
USA
WATER RESERVOIRS
WETLANDS