Hydrological and geochemical investigations of selenium behavior at Kesterson Reservoir

Technical Report · Mon May 01 04:00:00 EDT 1995

DOI:https://doi.org/10.2172/432914· OSTI ID:432914

Zawislanski, P T; Tokunaga, T K; Benson, S M ^[1]

---

1. Lawrence Berkeley Lab., CA (United States). Earth Sciences Div.; and others

This report describes research relevant to selenium specification, fractionation, physical redistribution, reduction and oxidation, and spatial distribution as related to Kesterson Reservoir. The work was carried out by scientists and engineers from the Earth Sciences Division of the Lawrence Berkeley Laboratory over a two year period from October 1992 to September 1994. Much of the focus of these efforts was on the effects of two above-average rainfall years (1991/1992 and 1992/1993). These events marked a departure from the previous six years of drought conditions, under which oxidation of Se in the soil profile led to a marked increase in soluble Se. Evidence from the last two years show that much of the re-oxidized Se was once more reduced due to increased soil moisture content. Also, in areas of high hydraulic conductivity, major vertical displacement of selenium and other solutes due to rainfall infiltration was observed. Such observations underscore the dependence of the future of Se speciation and distribution on environmental conditions.

• Research Organization: Lawrence Berkeley National Lab., CA (United States)
• Sponsoring Organization: Department of the Interior, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 432914
• Report Number(s): LBNL--39518; ON: DE97002692; CNN: Interagency Agreement 9-AA-20-20
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CALIFORNIA
ENVIRONMENTAL TRANSPORT
EXPERIMENTAL DATA
GROUND WATER
MONITORING
NATURE RESERVES
SELENIUM
SOILS
WATER CHEMISTRY
WATER QUALITY
WATER RESERVOIRS