Ground-water resources in the LOMPOC area, Santa Barbara County, California

Miller, Glenn A.

doi:10.3133/ofr76183

Cited by 5 publications

(24 citation statements)

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“…The geology of the Lompoc plain and surrounding areas was discussed in detail in reports by Dibblee (1950), Woodring and Bramlette (1950), Upson and Thomasson (1951), and Miller (1976). The geologic analysis presented in this report summarizes these reports, with an emphasis on the lithology of the consolidated rocks and unconsolidated deposits and on the structure of the basin that underlies the Lompoc area.…”

Section: Geologymentioning

confidence: 87%

“…The interaction of each recharge and discharge component within the Lompoc area is shown in figure 5. Estimates of average annual recharge from earlier studies by Upson and Thomasson (1951), Wilson (1959), Evenson (1966), Miller (1976), and Ahlroth and others (1977) Commerce, 1958Commerce, , 1954National Oceanic and Atmospheric Administration, 1976-88) and was considered to represent near-normal climatic conditions. Extremely wet conditions existed during 1935-44 when Upson and Thomasson studied the Lompoc area, and extremely dry conditions existed during 1947-51 when Wilson studied the area.…”

Section: Rechargementioning

confidence: 99%

“…In this report, estimates of seepage loss from streams entering the southern Lompoc plain by Wilson (1959) and Evenson (1966) were adjusted to correspond to this decrease in precipitation (table 2). Estimates by Miller (1976) and Ahlroth and others (1977) were based on channel-geometry studies on the streams south of the Lompoc plain.…”

Section: Rechargementioning

confidence: 99%

“…Dissolved-solids concentration of ground water from the surrounding Lompoc upland and terrace areas, however, has not changed appreciably in the last 50 years (Ahlroth and others, 1977). Several studies have documented the deterioration of ground-water quality in the Lompoc plain (Wilson, 1959;Evenson, 1966;Miller, 1976;Berenbrock, 1988). These studies suggested that recharge by irrigation-return flow may have been the principal cause of the deterioration.…”

Section: Introductionmentioning

confidence: 99%

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Ground-water hydrology and quality in the Lompoc area, Santa Barbara County, California, 1987-88

Bright¹,

Stamos²,

Martin³

et al. 1992

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Introduction 2 Purpose and scope 2 Description of the area 2 Acknowledgments 5 Well-numbering system 5 Geology 8 Lithologic units 8 Structural features 8 Groundwater hydrology 11 Definition of the aquifer system 11 Upper aquifer 11 Lower aquifer 11 Recharge 14 Discharge 19 Groundwater levels and movement 20 Seasonal changes 26 Long-term changes 29 Groundwater quality 30 Area! variation in groundwater quality 34 Upper aquifer 35 Shallow zone 35 Middle zone 38 Main zone 38 Lower aquifer 38 Vertical variation in groundwater quality 39 Stable-isotope chemistry 39 Distribution of stable isotopes and dissolved solids 40 Seasonal changes 44 Long-term changes 44 Upper aquifer 44 Shallow zone 44 Middle zone 45 Main zone 45 Lower aquifer 48 Conclusions 48 References cited 50 PLATE 1. Map showing generalized geology and geologic sections of the Lompoc area, Santa Barbara County, California In pocket Contents Conversion Factors and Vertical Datum V GROUNDWATER HYDROLOGY AND QUALITY IN THE

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Section: Geologymentioning

confidence: 87%

Section: Rechargementioning

confidence: 99%

Section: Rechargementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ground-water hydrology and quality in the Lompoc area, Santa Barbara County, California, 1987-88

Bright¹,

Stamos²,

Martin³

et al. 1992

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“…The presence of Vandenberg Air Force Base and a Federal prison here have increased concerns about ground-water quality. Dissolved-solids concentrations are generally about 1,000 to 1,500 mg/L in the eastern part of the Lompoc area and 1,500 to 3,000 mg/L in the western part (Miller, 1976). Extremely large concentrations of dissolved solids (as much as 24,000 mg/L) in some wells near the coast are the result of saltwater intrusion.…”

Section: Alluvium and Older Sediments Coastal Basinsmentioning

confidence: 99%

California ground-water quality

Lamb¹,

Woodard²

1987

Open-File Report

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Nearly 18 million people, about 69 percent of the population of California (fig. 1) rely on groundwater supplies. Ground water in principal aquifers (fig. 2) may not be suitable for all public-supply, domestic, agricultural, and industrial uses because of dissolved minerals or temperature but may support selected uses consistent with the quality of the water. The California State Water Resources Control Board (SWRCB) made a groundwater-quality assessment from 1984 to 1985 based on designated water use in 139 of 461 groundwater basins in the State identified by the California Department of Water Resources (DWR). The 139 basins comprise 79 percent of the surface area of all basins and include the top-priority basins based on population, use, and water-quality problems. Groundwater quality in the 139 basins is generally good, based on criteria established by SWRCB. Seventy-six percent of the groundwater basins assessed support designated water uses; whereas, 14 percent partially support uses. Water quality is unknown in about 8 percent of the basins assessed. Ground water of poor quality was found in parts or all of 21 basins (California State Water Resources Control Board, 1986). At 71 hazardous-waste sites (fig. 3), monitoring and evaluation of groundwater quality is required by the Federal Resource Conservation and Recovery Act (RCRA) of 1976. In addition to the RCRA sites, 34 other sites are included by the U.S. Environmental Protection Agency (EPA) in the National Priorities List (NPL) of hazardous-waste sites (U.S. Environmental Protection Agency, 1986c) under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980. Groundwater contamination from organic solvents, pesticides, acids, and trace metals has been detected at 26 of the 34 CERCLA sites. The California Department of Health Services (DOHS) has about 120 additional sites on a State toxic substances priority list where monitoring and evaluation are in progress. Twenty-three sites on 12 military installations were recommended for cleanup in phase IV of the U.S. Department of Defense (DOD) Installation Restoration Program (IRP), and remedial action has been completed at 11 sites as of September 1985. Numerous groundwater quality monitoring programs are conducted by other Federal, State, and local agencies. The DWR and cooperating agencies, including the U.S. Geological Survey, collect and analyze B Figure 1. Selected geographic features and 1985 population distribution in California. A.

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Hydrogeologic characterization of the San Antonio Creek Valley watershed, Santa Barbara County, California

Cromwell¹,

Sweetkind²,

Densmore³

et al. 2022

Scientific Investigations Report

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collection and analysis. The Cachuma Resource Conservation District facilitated community involvement with stakeholders in the San Antonio Creek area, and landowners in the San Antonio Creek area provided access for data collection and local and historical expertise about the area. In particular, we want to express appreciation for the guidance and dedication that Dennis Gibbs, former Hydrologist at Santa Barbara County Water Agency, gave to this project in its formative years.

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Ground-water resources in the LOMPOC area, Santa Barbara County, California

Cited by 5 publications

References 0 publications

Ground-water hydrology and quality in the Lompoc area, Santa Barbara County, California, 1987-88

Ground-water hydrology and quality in the Lompoc area, Santa Barbara County, California, 1987-88

California ground-water quality

Hydrogeologic characterization of the San Antonio Creek Valley watershed, Santa Barbara County, California

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