Author: J. E. Moran
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
The California Water Resources Control Board, in collaboration with the US Geological Survey and Lawrence Livermore National Laboratory, has implemented a program to assess the susceptibility of groundwater resources. Advanced techniques such as groundwater age dating using the tritium-helium method, extensive use of oxygen isotopes of the water molecule ({delta}{sup 18}O) for recharge water provenance, and analysis of common volatile organic compounds (VOCs) at ultra-low levels are applied with the goal of assessing the contamination vulnerability of deep aquifers, which are frequently used for public drinking water supply. Over 1200 public drinking water wells have been tested to date, resulting in a very large, tightly spaced collection of groundwater ages in some of the heavily exploited groundwater basins of California. Smaller scale field studies that include shallow monitoring wells are aimed at assessing the probability that nitrate will be transported to deep drinking water aquifers. When employed on a basin-scale, groundwater ages are an effective tool for identifying recharge areas, defining flowpaths, and determining the rate of transport of water and entrained contaminants. De-convolution of mixed ages, using ancillary dissolved noble gas data, gives insight into the water age distribution drawn at a well, and into the effective dilution of contaminants such as nitrate at long-screened production wells. In combination with groundwater ages, low-level VOCs are used to assess the impact of vertical transport. Special studies are focused on the fate and transport of nitrate with respect to vulnerability of aquifers in agricultural and formerly agricultural areas.
Evidence for Groundwater Contamination Vulnerability in California?s Central Valley
Author: J. E. Moran
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
The California Water Resources Control Board, in collaboration with the US Geological Survey and Lawrence Livermore National Laboratory, has implemented a program to assess the susceptibility of groundwater resources. Advanced techniques such as groundwater age dating using the tritium-helium method, extensive use of oxygen isotopes of the water molecule ({delta}{sup 18}O) for recharge water provenance, and analysis of common volatile organic compounds (VOCs) at ultra-low levels are applied with the goal of assessing the contamination vulnerability of deep aquifers, which are frequently used for public drinking water supply. Over 1200 public drinking water wells have been tested to date, resulting in a very large, tightly spaced collection of groundwater ages in some of the heavily exploited groundwater basins of California. Smaller scale field studies that include shallow monitoring wells are aimed at assessing the probability that nitrate will be transported to deep drinking water aquifers. When employed on a basin-scale, groundwater ages are an effective tool for identifying recharge areas, defining flowpaths, and determining the rate of transport of water and entrained contaminants. De-convolution of mixed ages, using ancillary dissolved noble gas data, gives insight into the water age distribution drawn at a well, and into the effective dilution of contaminants such as nitrate at long-screened production wells. In combination with groundwater ages, low-level VOCs are used to assess the impact of vertical transport. Special studies are focused on the fate and transport of nitrate with respect to vulnerability of aquifers in agricultural and formerly agricultural areas.
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
The California Water Resources Control Board, in collaboration with the US Geological Survey and Lawrence Livermore National Laboratory, has implemented a program to assess the susceptibility of groundwater resources. Advanced techniques such as groundwater age dating using the tritium-helium method, extensive use of oxygen isotopes of the water molecule ({delta}{sup 18}O) for recharge water provenance, and analysis of common volatile organic compounds (VOCs) at ultra-low levels are applied with the goal of assessing the contamination vulnerability of deep aquifers, which are frequently used for public drinking water supply. Over 1200 public drinking water wells have been tested to date, resulting in a very large, tightly spaced collection of groundwater ages in some of the heavily exploited groundwater basins of California. Smaller scale field studies that include shallow monitoring wells are aimed at assessing the probability that nitrate will be transported to deep drinking water aquifers. When employed on a basin-scale, groundwater ages are an effective tool for identifying recharge areas, defining flowpaths, and determining the rate of transport of water and entrained contaminants. De-convolution of mixed ages, using ancillary dissolved noble gas data, gives insight into the water age distribution drawn at a well, and into the effective dilution of contaminants such as nitrate at long-screened production wells. In combination with groundwater ages, low-level VOCs are used to assess the impact of vertical transport. Special studies are focused on the fate and transport of nitrate with respect to vulnerability of aquifers in agricultural and formerly agricultural areas.
Vulnerability to Groundwater Contamination Due to Agrochemical Use in the San Joaquin Valley, California
Author: James Sawyer Blanke
Publisher:
ISBN:
Category : Agricultural chemicals
Languages : en
Pages : 206
Book Description
Publisher:
ISBN:
Category : Agricultural chemicals
Languages : en
Pages : 206
Book Description
Ground Water in the Central Valley, California
Author: G. L. Bertoldi
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 56
Book Description
See journals under US Geological survey. Prof. paper 1401-A.
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 56
Book Description
See journals under US Geological survey. Prof. paper 1401-A.
Framework for a Ground-water Quality Monitoring and Assessment Program for California
Author: Kenneth Belitz
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 100
Book Description
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 100
Book Description
Framework for a Ground-Water Quality Monitoring and Assessment Program for California
Author:
Publisher: DIANE Publishing
ISBN: 1428960589
Category :
Languages : en
Pages : 88
Book Description
Publisher: DIANE Publishing
ISBN: 1428960589
Category :
Languages : en
Pages : 88
Book Description
Groundwater Contamination by Pesticides
Author: Yoram J. Litwin
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 234
Book Description
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 234
Book Description
Ground Water in the Central Valley, California
Author: G. L. Bertoldi
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 44
Book Description
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 44
Book Description
California's Central Valley Groundwater Study
Author:
Publisher:
ISBN:
Category : Central Valley (Calif. : Valley)
Languages : en
Pages : 4
Book Description
Publisher:
ISBN:
Category : Central Valley (Calif. : Valley)
Languages : en
Pages : 4
Book Description
Ground Water Pollution Investigations in California
Author: California. Department of Water Resources. Central District
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 64
Book Description
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 64
Book Description
Profiling Areas Vulnerable to Ground Water Contamination by Pesticides in California
Author:
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 68
Book Description
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 68
Book Description