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Mountaintop Mining: Background on Current Controversies
This report provides background on regulatory requirements, controversies, and legal challenges to Clean Water Act regulation of mountaintop mining. Congressional attention to these issues also is discussed.
Date:
January 24, 2007
Creator:
Copeland, Claudia
Object Type:
Report
System:
The UNT Digital Library
TOUGHREACT User's Guide: A Simulation Program for Non-isothermal Multiphase Reactive geochemical Transport in Variable Saturated Geologic Media
Coupled modeling of subsurface multiphase fluid and heat flow, solute transport and chemical reactions can be used for the assessment of mineral alteration in hydrothermal systems, waste disposal sites, acid mine drainage remediation, contaminant transport, and groundwater quality. A comprehensive non-isothermal multi-component reactive fluid flow and geochemical transport simulator, TOUGHREACT, has been developed. A wide range of subsurface thermo-physical-chemical processes is considered under various thermohydrological and geochemical conditions of pressure, temperature, water saturation, and ionic strength. The program can be applied to one-, two- or three-dimensional porous and fractured media with physical and chemical heterogeneity. The model can accommodate any number of chemical species present in liquid, gas and solid phases. A variety of equilibrium chemical reactions are considered, such as aqueous complexation, gas dissolution/exsolution, and cation exchange. Mineral dissolution/precipitation can proceed either subject to local equilibrium or kinetic conditions. Changes in porosity and permeability due to mineral dissolution and precipitation can be considered. Linear adsorption and decay can be included. For the purpose of future extensions, surface complexation by double layer model is coded in the program. Xu and Pruess (1998) developed a first version of a non-isothermal reactive geochemical transport model, TOUGHREACT, by introducing reactive geochemistry into the …
Date:
May 24, 2004
Creator:
Xu, Tianfu; Sonnenthal, Eric; Spycher, Nicolas & Pruess, Karsten
Object Type:
Report
System:
The UNT Digital Library
Dynamics of Crust Dissolution and Gas Release in Tank 241-SY-101
Due primarily to an increase in floating crust thickness, the waste level in Tank 241-SY-101 has grown appreciably and the flammable gas volume stored in the crust has become a potential hazard. To remediate gas retention in the crust and the potential for buoyant displacement gas releases from the nonconvective layer at the bottom of the tank, SY-101 will be diluted to dissolve a large fraction of the solids that allow the waste to retain gas. The plan is to transfer some waste out and back-dilute with water in several steps. In this work, mechanisms and rates of waste solids dissolution and gas releases are evaluated theoretically and experimentally. Particular emphasis is given to crust dissolution processes and associated gas releases, although dissolution and gas release from the mixed-slurry and nonconvective layers are also considered. The release of hydrogen gas to the tank domespace is modeled for a number of scenarios. Under the tank conditions expected at the time of back-dilution, no plausible continuous or sudden gas release scenarios resulting in flammable hydrogen concentrations were identified.
Date:
January 24, 2000
Creator:
Rassat, Scot D.; Stewart, Charles W.; Wells, Beric E.; Kuhn, William L.; Antoniak, Zenen I.; Cuta, Judith M. et al.
Object Type:
Report
System:
The UNT Digital Library
Advanced Reservoir Characterization in the Antelope Shale to Establish the Viability of CO2 Enhanced Oil Recovery in California's Monterey Formation Siliceous Shales, Class III
The primary objective of this project was to conduct advanced reservoir characterization and modeling studies in the Antelope Shale of the Bureau Vista Hills Field. Work was subdivided into two phases or budget periods. The first phase of the project focused on a variety of advanced reservoir characterization techniques to determine the production characteristics of the Antelope Shale reservoir. Reservoir models based on the results of the characterization work would then be used to evaluate how the reservoir would respond to enhanced oil recovery (EOR) processes such as of CO2 flooding. The second phase of the project would be to implement and evaluate a CO2 in the Buena Vista Hills Field. A successful project would demonstrate the economic viability and widespread applicability of CO2 flooding in siliceous shale reservoirs of the San Joaquin Valley.
Date:
April 24, 2000
Creator:
Perri, Pasquale R.; Cooney, John; Fong, Bill; Julander, Dale; Marasigan, Aleks; Morea, Mike et al.
Object Type:
Report
System:
The UNT Digital Library
Science & Technology Review December 2007
This month's issue has the following articles: (1) Homeland Security Begins Abroad--Commentary by John C. Doesburg; (2) Out of Harm's Way--New physical protection and accountability systems, together with a focus on security, safeguard nuclear materials in the Russian Federation; (3) A Calculated Journey to the Center of the Earth--Determining the permeability of partially melted metals in a mineral matrix unlocks secrets about the formation of Earth's core; (4) Wireless That Works--Communication technologies using ultrawideband radar are improving national security; and (5) Power to the People--Edward Teller envisioned safe and plentiful nuclear power for peaceful applications.
Date:
October 24, 2007
Creator:
Chinn, D. J.
Object Type:
Report
System:
The UNT Digital Library
Cherokeean Herald (Rusk, Tex.), Vol. 157, No. 49, Ed. 1 Wednesday, January 24, 2007
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
January 24, 2007
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean Herald (Rusk, Tex.), Vol. 160, No. 18, Ed. 1 Wednesday, June 24, 2009
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
June 24, 2009
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean Herald (Rusk, Tex.), Vol. 159, No. 31, Ed. 1 Wednesday, September 24, 2008
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
September 24, 2008
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean Herald (Rusk, Tex.), Vol. 159, No. 44, Ed. 1 Wednesday, December 24, 2008
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
December 24, 2008
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean Herald (Rusk, Tex.), Vol. 158, No. 35, Ed. 1 Wednesday, October 24, 2007
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
October 24, 2007
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Heterogeneous Shallow-Shelf Carbonate Buildups in the Paradox Basin, Utah and Colorado: Targets for Increased Oil Production and Reserves Using Horizontal Drilling Techniques
This report covers research activities for the second half of the second project year (October 6, 2001, through April 5, 2002). This work includes description and analysis of cores, correlation of geophysical well logs, reservoir mapping, petrographic description of thin sections, cross plotting of permeability and porosity data, and development of horizontal drilling strategies for the Little Ute and Sleeping Ute fields in Montezuma County, Colorado. Geological characterization on a local scale focused on reservoir heterogeneity, quality, and lateral continuity, as well as possible compartmentalization, within these fields. This study utilizes representative core, geophysical logs, and thin sections to characterize and grade each field's potential for drilling horizontal laterals from existing development wells.
Date:
July 24, 2002
Creator:
Wray, Laura L.; Eby, David E. & Chidsey, Thomas C., Jr.
Object Type:
Report
System:
The UNT Digital Library
Application of advanced reservoir characterization, simulation, and production optimization strategies to maximize recovery in slope and basin clastic reservoirs, West Texas (Delaware Basin), Class III
The objective of this Class 3 project was to demonstrate that detailed reservoir characterization of slope and basin clastic reservoirs in sandstones of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico is a cost effective way to recover a higher percentage of the original oil in place through strategic placement of infill wells and geologically based field development. Phase 1 of the project, reservoir characterization, was completed this year, and Phase 2 began. The project is focused on East Ford field, a representative Delaware Mountain Group field that produces from the upper Bell Canyon Formation (Ramsey sandstone). The field, discovered in 1960, is operated by Oral Petco, Inc., as the East Ford unit. A CO{sub 2} flood is being conducted in the unit, and this flood is the Phase 2 demonstration for the project.
Date:
May 24, 2000
Creator:
Dutton, Shirley P.; Flanders, William A. & Zirczy, Helena H.
Object Type:
Report
System:
The UNT Digital Library
Nitrate Biogeochemistry and Reactive Transport in California Groundwater: LDRD Final Report
Nitrate is the number one drinking water contaminant in the United States. It is pervasive in surface and groundwater systems,and its principal anthropogenic sources have increased dramatically in the last 50 years. In California alone, one third of the public drinking-water wells has been lost since 1988 and nitrate contamination is the most common reason for abandonment. Effective nitrate management in groundwater is complicated by uncertainties related to multiple point and non-point sources, hydrogeologic complexity, geochemical reactivity, and quantification of denitrification processes. In this paper, we review an integrated experimental and simulation-based framework being developed to study the fate of nitrate in a 25 km-long groundwater subbasin south of San Jose, California, a historically agricultural area now undergoing rapid urbanization with increasing demands for groundwater. The modeling approach is driven by a need to integrate new and archival data that support the hypothesis that nitrate fate and transport at the basin scale is intricately related to hydrostratigraphic complexity, variability of flow paths and groundwater residence times, microbial activity, and multiple geochemical reaction mechanisms. This study synthesizes these disparate and multi-scale data into a three-dimensional and highly resolved reactive transport modeling framework.
Date:
February 24, 2006
Creator:
Esser, B. K.; Beller, H.; Carle, S.; Cey, B.; Hudson, G. B.; Leif, R. et al.
Object Type:
Report
System:
The UNT Digital Library
MOUNTAIN-SCALE COUPLED PROCESSES (TH/THC/THM)MODELS
This report documents the development and validation of the mountain-scale thermal-hydrologic (TH), thermal-hydrologic-chemical (THC), and thermal-hydrologic-mechanical (THM) models. These models provide technical support for screening of features, events, and processes (FEPs) related to the effects of coupled TH/THC/THM processes on mountain-scale unsaturated zone (UZ) and saturated zone (SZ) flow at Yucca Mountain, Nevada (BSC 2005 [DIRS 174842], Section 2.1.1.1). The purpose and validation criteria for these models are specified in ''Technical Work Plan for: Near-Field Environment and Transport: Coupled Processes (Mountain-Scale TH/THC/THM, Drift-Scale THC Seepage, and Drift-Scale Abstraction) Model Report Integration'' (BSC 2005 [DIRS 174842]). Model results are used to support exclusion of certain FEPs from the total system performance assessment for the license application (TSPA-LA) model on the basis of low consequence, consistent with the requirements of 10 CFR 63.342 [DIRS 173273]. Outputs from this report are not direct feeds to the TSPA-LA. All the FEPs related to the effects of coupled TH/THC/THM processes on mountain-scale UZ and SZ flow are discussed in Sections 6 and 7 of this report. The mountain-scale coupled TH/THC/THM processes models numerically simulate the impact of nuclear waste heat release on the natural hydrogeological system, including a representation of heat-driven processes occurring in the …
Date:
August 24, 2005
Creator:
Wu, Y.S.
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with George E. Fortenberry, September 24, 2003
Access:
Use of this item is restricted to the UNT Community
Interview with George E. Fortenberry, who is an Army veteran and college professor from Arlington, Texas. In the interview, Fortenberry discusses his experiences in the Southwest Pacific Theatre during his time as a member of the 112th Cavalry of the Texas National Guard during World War II. He also describes what it was like growing up during the Great Depression and attending various different schools in both Texas and Oklahoma. Fortenberry discusses why he decided to join the National Guard, and also his experiences in early basic cavalry training. During much of the interview, Fortenberry reminisces about many of his various assignments and duties while serving in the war. Among these discussed include his assignment as a clerk to the veterinary section, time in Fort Bliss and Fort Clark, his shipment overseas to Noumea in New Caledonia, his transfer to the Medical Detachment as a clerk, and his time in New Britain, New Guinea and the Philippines. Fortenberry also recollects about everyday life in the Southwest Pacific, and includes details on tropical diseases and combat-related psychological problems that many of his comrades suffered through.
Date:
September 24, 2003
Creator:
Johnston, Glenn T. & Fortenberry, George E.
Object Type:
Book
System:
The UNT Digital Library
Oral History Interview with Thomas Alt, August 24, 2004
The National Museum of the Pacific War presents an interview with Thomas Alt. Alt joined the Aviation Cadet Corps in June of 1942 at the age of 17. By January of 1943, once he turned 18, he was called up for training. In mid-1943 he traveled to Pearl Harbor, and completed Fire Fighting School with the Navy while on the island. In mid-1944 Alt was assigned to the USS Sea Cat (SS-399). He worked as Military Police on night shifts and guard duty in the brig. They traveled to Saipan and the South China Sea where the Sea Cat operated in a wolf pack. He landed on Saipan 7 July 7, as the battle was coming to an end. He served with a firefighting crew on the beach for pilots making emergency or crash landings. Alt remained on Saipan through early 1945. He was stationed on Tinian in July, and recalls when the Enola Gay landed. He returned to the US and was discharged in March of 1945.
Date:
August 24, 2004
Creator:
Alt, Thomas
Object Type:
Text
System:
The Portal to Texas History
The Dublin Citizen (Dublin, Tex.), Vol. 14, No. 43, Ed. 1 Thursday, June 24, 2004
Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date:
June 24, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 129, No. 39, Ed. 1 Thursday, February 24, 2005
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
February 24, 2005
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
Oral History Interview with Ethel Reisberg Schectman, March 24, 2001
The National Museum of the Pacific War presents an oral interview with Ethel Reisberg Schectman. She begins by discussing her family background: her parents were Jews born in Poland and emigrated to the United States. Ethel's European aunts, uncles and grandparents all likely died in the Holocaust. As a first grade student, she taught her mother, a Polish immigrant, how to read and write English. She recalls, wartime rationing, Victory Gardens, scrap drives, and antisemitism among her school-aged classmates in Dallas, Texas, and the end of the war.
Date:
March 24, 2001
Creator:
Schectman, Ethel
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Ethel Reisberg Schectman, March 24, 2001
Interview with Ethel Reisburg Schectman of Fort Worth, Texas, who was born in New York City during the Great Depression to Jewish Polish immigrant parents. The interview includes Hill's personal experiences of World War II on the home front, including memories of D-Day, iron metal scrap drives, victory gardens, rationing, V-E and V-J Days, and what it was like being Jewish in Dallas during that time.
Date:
March 24, 2001
Creator:
Cox, Floyd & Schectman, Ethel Reisberg
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Thomas Alt, August 24, 2004
The National Museum of the Pacific War presents an interview with Thomas Alt. Alt joined the Aviation Cadet Corps in June of 1942 at the age of 17. By January of 1943, once he turned 18, he was called up for training. In mid-1943 he traveled to Pearl Harbor, and completed Fire Fighting School with the Navy while on the island. In mid-1944 Alt was assigned to the USS Sea Cat (SS-399). He worked as Military Police on night shifts and guard duty in the brig. They traveled to Saipan and the South China Sea where the Sea Cat operated in a wolf pack. He landed on Saipan 7 July 7, as the battle was coming to an end. He served with a firefighting crew on the beach for pilots making emergency or crash landings. Alt remained on Saipan through early 1945. He was stationed on Tinian in July, and recalls when the Enola Gay landed. He returned to the US and was discharged in March of 1945.
Date:
August 24, 2004
Creator:
Alt, Thomas
Object Type:
Sound
System:
The Portal to Texas History
Citizens' Advocate (Coppell, Tex.), Vol. 21, No. 25, Ed. 1 Friday, June 24, 2005
Weekly newspaper from Coppell, Texas that includes local, state, and national news along with advertising.
Date:
June 24, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
North Texas Daily (Denton, Tex.), Vol. 88, No. 93, Ed. 1 Wednesday, March 24, 2004
Daily student newspaper from the University of North Texas in Denton, Texas that includes local, state and campus news along with advertising.
Date:
March 24, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Throckmorton Tribune (Throckmorton, Tex.), Vol. 114, No. 47, Ed. 1 Thursday, August 24, 2000
Weekly newspaper from Throckmorton, Texas that includes local, state, and national news along with advertising.
Date:
August 24, 2000
Creator:
Mayes, Cecil
Object Type:
Newspaper
System:
The Portal to Texas History