Depositional Environment, Stratigraphy, and Vertical Hydraulic Conductivity of the St. Francois Confining Unit in the Fristoe Unit of the Mark Twain National Forest, Missouri PDF Download
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Author: Michael J. Kleeschulte
Publisher:
ISBN:
Category : Borings
Languages : en
Pages : 76
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Author: Michael J. Kleeschulte
Publisher:
ISBN:
Category : Borings
Languages : en
Pages : 76
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Author: Michael J. Kleeschulte
Publisher:
ISBN:
Category : Hydrogeology
Languages : en
Pages : 76
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Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 70
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Book Description
Author: Michael J. Kleeschulte
Publisher:
ISBN:
Category : Electronic government information
Languages : en
Pages : 82
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Author: Michael J. Kleeschulte
Publisher:
ISBN:
Category : Hydrogeology
Languages : en
Pages : 80
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Book Description
Author: Kevin R. Evans
Publisher: Geological Society of America
ISBN: 0813700175
Category : History
Languages : en
Pages : 166
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Book Description
"Despite a long history of geologic investigations in the Ozarks, new studies and analyses continue to elucidate our understanding of the complex interconnection between the basement, extensive carbonate platforms, structural overprinting, mineralization, karstification, and hydrology. This guidebook volume highlights a few of these aspects as well as the connection to culture, history, and economic development of the Ozarks region."--Publisher's description.
Author:
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 65
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Book Description
The Columbia Plateau Regional Aquifer System (CPRAS) covers an area of about 44,000 square miles in a structural and topographic basin within the drainage of the Columbia River in Washington, Oregon, and Idaho. The primary aquifers are basalts of the Columbia River Basalt Group (CRBG) and overlying sediment. Eighty percent of the groundwater use in the study area is for irrigation, in support of a $6 billion per year agricultural economy. Water-resources issues in the Columbia Plateau include competing agricultural, domestic, and environmental demands. Groundwater levels were measured in 470 wells in 1984 and 2009; water levels declined in 83 percent of the wells, and declines greater than 25 feet were measured in 29 percent of the wells. Conceptually, the system is a series of productive basalt aquifers consisting of permeable interflow zones separated by less permeable flow interiors; in places, sedimentary aquifers overly the basalts. The aquifer system of the CPRAS includes seven hydrogeologic units--the overburden aquifer, three aquifer units in the permeable basalt rock, two confining units, and a basement confining unit. The overburden aquifer includes alluvial and colluvial valley-fill deposits; the three basalt units are the Saddle Mountains, Wanapum, and Grande Ronde Basalts and their intercalated sediments. The confining units are equivalent to the Saddle Mountains-Wanapum and Wanapum-Grande Ronde interbeds, referred to in this study as the Mabton and Vantage Interbeds, respectively. The basement confining unit, referred to as Older Bedrock, consists of pre-CRBG rocks that generally have much lower permeabilities than the basalts and are considered the base of the regional flow system. Based on specific-capacity data, median horizontal hydraulic conductivity (Kh) values for the overburden, basalt units, and bedrock are 161, 70, and 6 feet per day, respectively. Analysis of oxygen isotopes in water and carbon isotopes in dissolved inorganic carbon from groundwater samples indicates that groundwater in the CPRAS ranges in age from modern (50 years) to Pleistocene (10,000 years). The oldest groundwater resides in deep, downgradient locations indicating that groundwater movement and replenishment in parts of this regional aquifer system have operated on long timescales under past natural conditions, which is consistent with the length and depth of long flow paths in the system. The mean annual recharge from infiltration of precipitation for the 23-year period 1985-2007 was estimated to be 4.6 inches per year (14,980 cubic feet per second) using a polynomial regression equation based on annual precipitation and the results of recharge modeling done in the 1980s. A regional-scale hydrologic budget was developed using a monthly SOil WATer (SOWAT) Balance model to estimate irrigation-water demand, groundwater flux (recharge or discharge), direct runoff, and soil moisture within irrigated areas. Mean monthly irrigation throughout the study area peaks in July at 1.6 million acre-feet (MAF), of which 0.45 and 1.15 MAF are from groundwater and surface-water sources, respectively. Annual irrigation water use in the study area averaged 5.3 MAF during the period 1985-2007, with 1.4 MAF (or 26 percent) supplied from groundwater and 3.9 MAF supplied from surface water. Mean annual recharge from irrigation return flow in the study area was 4.2 MAF (1985-2007) with 2.1 MAF (50 percent) occurring within the predominately surface-water irrigated regions of the study area. Annual groundwater-use estimates were made for public supply, self-supplied domestic, industrial, and other uses for the period 1984 through 2009. Public supply groundwater use within the study area increased from 200,600 acre-feet per year (acre-ft/yr) in 1984 to 269,100 acre-ft/yr in 2009. Domestic self-supplied groundwater use increased from 54,580 acre-ft/yr in 1984 to 71,160 acre-ft/yr in 2009. Industrial groundwater use decreased from 53,390 acre-ft/yr in 1984 to 43,930 acre-ft/yr in 2009.
Author: Sharon E. Kroening
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 122
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Author: Zoran Stevanović
Publisher: Springer
ISBN: 3319128507
Category : Science
Languages : en
Pages : 692
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Book Description
This practical training guidebook makes an important contribution to karst hydrogeology. It presents supporting material for academic courses worldwide that include this and similar topics. It is an excellent sourcebook for students and other attendees of the International Karst School: Characterization and Engineering of Karst Aquifers, which opened in Trebinje, Bosnia & Herzegovina in 2014 and which will be organized every year in early summer. As opposed to more theoretical works, this is a catalog of possible engineering interventions in karst and their implications. Although the majority of readers will be professionals with geology/hydrogeology backgrounds, the language is not purely technical making it accessible to a wider audience. This means that the methodology, case studies and experiences presented will also benefit water managers working in karst environments.
Author: Aaron L. Pugh
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 20
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Book Description
