Author: Mark E. Jensen
Publisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 72
Book Description
Methods commonly used to delineate protection zones for water-supply wells are often not directly applicable for springs. This investigation focuses on the use of hydrogeologic mapping methods to identify physical and hydrologic features that control ground-water flow to springs to aid in delineating springhead protection zones. Two public-supply springs were selected as study sites to represent diversegeologic settings. One spring discharges from fractured dolomite and one from fractures siltstone, sandstone, and shale. Hydrogeologic mapping techniques, as applied in this study, are methods for mapping geologic or hydrologic features or geophysical/geochemical signatures of subsurface features. These data are often supplemented with information from subsurface investigations to aid in extrapolating surface results to aquifer depths. In this investigation, geologic mapping, fracture-trace analysis, topographic analysis, catchment area estimation, geochemical characterization, elemental isotope studies, and a tracer study were used to locate and describe potential ground-water flow boundaries and pathways and develop conceptual models for site hydrogeology. Results were integrated to estimate the zones of contribution to each spring and evaluated for use in the delineation of potential protection zones. Data from borings and hydraulic tests supported this characterization by providing direct and indirect information regarding susurface lithology and hydraulic parameters. In these case studies, results of hydrogeologic mapping allowed development of the conceptual model for site hydrology and evaluation of potential ground-water flow controls. Although definitive ground-water flow boundaries suitable for delineation of practicable protection zones could not be identified at either site, these techniques provided sufficient information to support an initial evaluation of potential protection zones. These results would also serve as a strong basis for additional investigations if more detailed or reliable delineations were warrented.
Investigation of Hydrogeologic Mapping to Delineate Protection Zones Around Springs
Author: Mark E. Jensen
Publisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 72
Book Description
Methods commonly used to delineate protection zones for water-supply wells are often not directly applicable for springs. This investigation focuses on the use of hydrogeologic mapping methods to identify physical and hydrologic features that control ground-water flow to springs to aid in delineating springhead protection zones. Two public-supply springs were selected as study sites to represent diversegeologic settings. One spring discharges from fractured dolomite and one from fractures siltstone, sandstone, and shale. Hydrogeologic mapping techniques, as applied in this study, are methods for mapping geologic or hydrologic features or geophysical/geochemical signatures of subsurface features. These data are often supplemented with information from subsurface investigations to aid in extrapolating surface results to aquifer depths. In this investigation, geologic mapping, fracture-trace analysis, topographic analysis, catchment area estimation, geochemical characterization, elemental isotope studies, and a tracer study were used to locate and describe potential ground-water flow boundaries and pathways and develop conceptual models for site hydrogeology. Results were integrated to estimate the zones of contribution to each spring and evaluated for use in the delineation of potential protection zones. Data from borings and hydraulic tests supported this characterization by providing direct and indirect information regarding susurface lithology and hydraulic parameters. In these case studies, results of hydrogeologic mapping allowed development of the conceptual model for site hydrology and evaluation of potential ground-water flow controls. Although definitive ground-water flow boundaries suitable for delineation of practicable protection zones could not be identified at either site, these techniques provided sufficient information to support an initial evaluation of potential protection zones. These results would also serve as a strong basis for additional investigations if more detailed or reliable delineations were warrented.
Publisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 72
Book Description
Methods commonly used to delineate protection zones for water-supply wells are often not directly applicable for springs. This investigation focuses on the use of hydrogeologic mapping methods to identify physical and hydrologic features that control ground-water flow to springs to aid in delineating springhead protection zones. Two public-supply springs were selected as study sites to represent diversegeologic settings. One spring discharges from fractured dolomite and one from fractures siltstone, sandstone, and shale. Hydrogeologic mapping techniques, as applied in this study, are methods for mapping geologic or hydrologic features or geophysical/geochemical signatures of subsurface features. These data are often supplemented with information from subsurface investigations to aid in extrapolating surface results to aquifer depths. In this investigation, geologic mapping, fracture-trace analysis, topographic analysis, catchment area estimation, geochemical characterization, elemental isotope studies, and a tracer study were used to locate and describe potential ground-water flow boundaries and pathways and develop conceptual models for site hydrogeology. Results were integrated to estimate the zones of contribution to each spring and evaluated for use in the delineation of potential protection zones. Data from borings and hydraulic tests supported this characterization by providing direct and indirect information regarding susurface lithology and hydraulic parameters. In these case studies, results of hydrogeologic mapping allowed development of the conceptual model for site hydrology and evaluation of potential ground-water flow controls. Although definitive ground-water flow boundaries suitable for delineation of practicable protection zones could not be identified at either site, these techniques provided sufficient information to support an initial evaluation of potential protection zones. These results would also serve as a strong basis for additional investigations if more detailed or reliable delineations were warrented.
Water-resources Investigations Report
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 100
Book Description
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 100
Book Description
EPA 200-B.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 856
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 856
Book Description
EPA National Publications Catalog
Author: United States. Environmental Protection Agency
Publisher:
ISBN:
Category : Environmental protection
Languages : en
Pages : 848
Book Description
Publisher:
ISBN:
Category : Environmental protection
Languages : en
Pages : 848
Book Description
U.S. Geological Survey Karst Interest Group Proceedings, Shepherdstown, West Virginia August 20-22, 2002
Author: U.S. Geological Survey Karst Interest Group
Publisher:
ISBN:
Category : Karst
Languages : en
Pages : 102
Book Description
Publisher:
ISBN:
Category : Karst
Languages : en
Pages : 102
Book Description
Ground-water Sensitivity and Vulnerability to Pesticides, Central Virgin River Basin, Washington and Iron Counties, Utah
Author: Mike Lowe
Publisher: Utah Geological Survey
ISBN: 1557917566
Category :
Languages : en
Pages : 29
Book Description
The U.S. Environmental Protection Agency has recommended that states develop Pesticide Management Plans for four agricultural chemicals - alachlor, atrazine, metolachlor, and simazine - used in Utah as herbicides in the production of corn and sorghum, and to control weeds and undesired vegetation (such as along right-of-ways or utility substations). This report and accompanying maps are intended to be used as part of these Pesticide Management Plans to provide local, state, and federal government agencies and agricultural pesticide users with a base of information concerning sensitivity and vulnerability of ground water in the basin-fill aquifer (bedrock is not evaluated) to agricultural pesticides in the central Virgin River basin, Washington and Iron Counties, Utah. We used existing data to produce pesticide sensitivity and vulnerability maps by applying an attribute ranking system specifically tailored to the western United States using Geographic Information System analysis methods. 24 pages + 2 plates
Publisher: Utah Geological Survey
ISBN: 1557917566
Category :
Languages : en
Pages : 29
Book Description
The U.S. Environmental Protection Agency has recommended that states develop Pesticide Management Plans for four agricultural chemicals - alachlor, atrazine, metolachlor, and simazine - used in Utah as herbicides in the production of corn and sorghum, and to control weeds and undesired vegetation (such as along right-of-ways or utility substations). This report and accompanying maps are intended to be used as part of these Pesticide Management Plans to provide local, state, and federal government agencies and agricultural pesticide users with a base of information concerning sensitivity and vulnerability of ground water in the basin-fill aquifer (bedrock is not evaluated) to agricultural pesticides in the central Virgin River basin, Washington and Iron Counties, Utah. We used existing data to produce pesticide sensitivity and vulnerability maps by applying an attribute ranking system specifically tailored to the western United States using Geographic Information System analysis methods. 24 pages + 2 plates
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 892
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 892
Book Description
Delineation of Ground-water Basins and Recharge Areas for Municipal Water-supply Springs in a Karst Aquifer System in the Elizabethtown Area, Northern Kentucky
Author: Charles J. Taylor
Publisher:
ISBN:
Category : Hydrogeology
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category : Hydrogeology
Languages : en
Pages : 32
Book Description
Environmental and Engineering Geology of the Wasatch Front Region
Author: Utah Geological Association. Field Conference
Publisher:
ISBN:
Category : Engineering geology
Languages : en
Pages : 582
Book Description
Publisher:
ISBN:
Category : Engineering geology
Languages : en
Pages : 582
Book Description
Tracers and Modelling in Hydrogeology
Author: Alain Dassargues
Publisher: IAHS Press
ISBN: 9781901502213
Category : Groundwater flow
Languages : en
Pages : 588
Book Description
Publisher: IAHS Press
ISBN: 9781901502213
Category : Groundwater flow
Languages : en
Pages : 588
Book Description