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Guest Artist Lecture Recital: 2005-02-09 - Allen Forte, music theorist and Madeleine Forte, piano

Access: Use of this item is restricted to the UNT Community
Guest lecture recital performed at the UNT College of Music Recital Hall.
Date: February 8, 2005
Creator: Forte, Allen & Forte, Madeleine
Object Type: Sound
System: The UNT Digital Library
Military Personnel: Guidance Needed for Any Future Conversions of Military Medical Positions to Civilian Positions (open access)

Military Personnel: Guidance Needed for Any Future Conversions of Military Medical Positions to Civilian Positions

Correspondence issued by the Government Accountability Office with an abstract that begins "Since September 11, 2001, the high pace of military operations has placed significant stress on U.S. operating forces. In late 2003, the Department of Defense (DOD) reported that several studies had found that tens of thousands of military personnel were performing tasks that were not military essential and that these tasks could be performed more cost effectively by civilian or private-sector contract employees. To address this matter, DOD, in fiscal year 2004, began a multiyear initiative to convert military positions, including military health care positions, to federal civilian or contract positions. Within DOD, the Office of the Under Secretary of Defense, Personnel and Readiness (USD, P&R), has overall responsibility for issuing guidance on manpower management, which includes guidance related to determining the least costly mix of military, civilian, and contract personnel. Additionally, the Under Secretary of Defense (Comptroller) (USD (C)) and the Director, Program Analysis and Evaluation (PA&E) play key roles in determining the costs of military, civilian, and contract personnel. For example, the USD(C) is responsible for developing the composite pay rates used in developing military and civilian personnel budgets and PA&E provides leadership in developing and …
Date: February 8, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Insurers' Ability to Pay Catastrophe Claims (open access)

Insurers' Ability to Pay Catastrophe Claims

Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the insurance industry's capacity to pay natural catastrophe claims, focusing on: (1) comparing available data on industry financial resources to estimates of potential insured losses that would result from natural catastrophes of various magnitudes; (2) two recent studies of capacity; and (3) factors that may affect the stability of insurer capacity over time."
Date: February 8, 2000
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Leaking Underground Storage Tanks: EPA Should Take Steps to Better Ensure the Effective Use of Public Funding for Cleanups (open access)

Leaking Underground Storage Tanks: EPA Should Take Steps to Better Ensure the Effective Use of Public Funding for Cleanups

A letter report issued by the Government Accountability Office with an abstract that begins "Underground storage tanks that leak hazardous substances can contaminate nearby groundwater and soil. Under the Resource Conservation and Recovery Act (RCRA), tank owners and operators are primarily responsible for paying to clean up releases from their tanks. They can demonstrate their financial responsibility by using, among other options, publicly funded state financial assurance funds. Such funds function like insurance and are intended to ensure timely cleanup. These funds also pay to clean up releases from tanks without a viable owner, as does the federal Leaking Underground Storage Tank (LUST) Trust Fund. GAO was asked to report on (1) states' estimates of the public costs to clean up known releases, (2) states' primary sources of cleanups funding and their viability, and (3) federal sources to address these releases. GAO surveyed all states and discussed key issues with EPA and selected state officials."
Date: February 8, 2007
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Highway Public-Private Partnerships: More Rigorous Up-front Analysis Could Better Secure Potential Benefits and Protect the Public Interest (open access)

Highway Public-Private Partnerships: More Rigorous Up-front Analysis Could Better Secure Potential Benefits and Protect the Public Interest

A letter report issued by the Government Accountability Office with an abstract that begins "The United States is at a critical juncture in addressing the demands on its transportation system, including highway infrastructure. State and local governments are looking for alternatives, including increased private sector participation. GAO was asked to review (1) the benefits, costs, and trade-offs of public-private partnerships; (2) how public officials have identified and acted to protect the public interest in these arrangements; and (3) the federal role in public-private partnerships and potential changes in this role. GAO reviewed federal legislation, interviewed federal, state, and other officials, and reviewed the experience of Australia, Canada, and Spain. GAO's work focused on highway-related public-private partnerships and did not review all forms of public-private partnerships."
Date: February 8, 2008
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Elections: Results of GAO's Testing of Voting Systems Used in Sarasota County in Florida's 13th Congressional District (open access)

Elections: Results of GAO's Testing of Voting Systems Used in Sarasota County in Florida's 13th Congressional District

A statement of record issued by the Government Accountability Office with an abstract that begins "In November 2006, about 18,000 undervotes were reported in Sarasota County in the race for Florida's 13th Congressional District (Florida-13). After the election results were contested in the House of Representatives, the task force unanimously voted to seek GAO's assistance in determining whether the voting systems contributed to the large undervote in Sarasota County. In October 2007, GAO presented its findings on the review of the voting systems and concluded that while prior tests and reviews provided some assurance that the voting systems performed correctly, they were not enough to provide reasonable assurance that the voting systems in Sarasota County did not contribute to the undervote. GAO proposed that a firmware verification test, a ballot test, and a calibration test be conducted. The task force requested that GAO proceed with the proposed additional tests. GAO also verified whether source code escrowed by Florida could be rebuilt into the firmware used in Sarasota County. To conduct its work, GAO conducted tests on a sample of voting systems used in Sarasota County during the 2006 general election. GAO witnessed the rebuild of the firmware from the escrowed …
Date: February 8, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Military Personnel: Additional Actions Needed to Improve Oversight of Reserve Employment Issues (open access)

Military Personnel: Additional Actions Needed to Improve Oversight of Reserve Employment Issues

A letter report issued by the Government Accountability Office with an abstract that begins "Since September 11, 2001, the Department of Defense (DOD) has mobilized more than 500,000 reservists. As reservists demobilize, concerns exist about difficulties with their civilian employment. Public Law 109-163 required GAO to report on reservists' civilian employer data and employment matters. GAO assessed (1) the status of DOD's efforts to capture reservists' employer data; (2) DOD, Labor, Justice, and Office of Special Counsel processes to track and address reservists' Uniformed Services Employment and Reemployment Rights Act (USERRA) complaints; and (3) the four federal agencies' efforts to track reservists' USERRA complaints related to disabilities incurred while on active duty. GAO reviewed policies and procedures for reporting and tracking complaints; DOD's civilian employer database for reservists and reservists' USERRA complaints; and data reliability and quality checks."
Date: February 8, 2007
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Defense Logistics: Army Has Not Fully Planned or Budgeted for the Reconstitution of Its Afloat Prepositioned Stocks (open access)

Defense Logistics: Army Has Not Fully Planned or Budgeted for the Reconstitution of Its Afloat Prepositioned Stocks

Correspondence issued by the Government Accountability Office with an abstract that begins "At various stages throughout the current operations in Iraq and Afghanistan, the Army has withdrawn equipment from its stored, or prepositioned, stock sets around the world, as well as from its afloat stocks, thus depleting a large portion of its prepositioned stocks. The Army prepositions equipment at diverse strategic locations in order to field combat-ready forces in days rather than the weeks it would take if equipment had to be moved from the United States to the location of the conflict. The Army Prepositioned Stocks (APS) program supports the National Military Strategy and is an important part of the Department of Defense's (DOD) overall strategic mobility framework. The APS program depends on prepositioned unit sets of equipment and sustainment stocks to enable troops to deploy rapidly and train with prepositioned equipment before beginning combat operations. As we testified in January 2007 and March 2006, however, sustained continuing operations have taken a toll on the condition and readiness of military equipment, and the Army faces a number of ongoing and long-term challenges that will affect both the timing and cost of equipment repair and replacement, particularly to its prepositioned …
Date: February 8, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Breastfeeding: Some Strategies Used to Market Infant Formula May Discourage Breastfeeding; State Contracts Should Better Protect Against Misuse of WIC Name (open access)

Breastfeeding: Some Strategies Used to Market Infant Formula May Discourage Breastfeeding; State Contracts Should Better Protect Against Misuse of WIC Name

A letter report issued by the Government Accountability Office with an abstract that begins "Millions of U.S. mothers and infants each year forgo the health benefits of breastfeeding and rely on infant formula. Infants who are breastfed are less likely to develop infectious diseases and chronic health problems, such as diabetes and asthma, while breastfeeding mothers are less likely to develop certain types of cancer. Recognizing the health benefits of breastfeeding for infants and mothers, the U.S. Department of Health and Human Services' Healthy People 2010 campaign has recommended that more U.S. infants be breastfed and that babies be breastfed for longer periods of time. According to the U.S. Department of Agriculture (USDA), the U.S. would save a minimum of $3.6 billion in health care costs and indirect costs, such as parents' lost wages, if breastfeeding increased to meet these Healthy People goals. Breastfeeding rates are particularly low among infants who participate in the Special Supplemental Nutrition Program for Women, Infants and Children (WIC). WIC is administered by the USDA's Food and Nutrition Service (FNS) in cooperation with state and local agencies. The program provides free food and infant formula to improve the health and nutritional well-being of low-income women, …
Date: February 8, 2006
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Federal Contact Centers: Mechanism for Sharing Metrics and Oversight Practices along with Improved Data Needed (open access)

Federal Contact Centers: Mechanism for Sharing Metrics and Oversight Practices along with Improved Data Needed

A letter report issued by the Government Accountability Office with an abstract that begins "Federal agencies have increasingly relied on contact centers--centers handling inquiries via multiple channels such as telephone, Web page, e-mail, and postal mail--as a key means of communicating with the public. Many of these centers are contractor-operated. Concerns exist about the accuracy of responses provided through contractor-operated centers. This report examines (1) the extent to which the contract terms and oversight practices for contact centers at selected agencies emphasize the importance of providing accurate information to the public, and (2) whether guidance for the operation of contact centers and basic information needed to provide general oversight exist. GAO reviewed one contractor-operated contact center at each of six agencies: the Centers for Disease Control and Prevention (CDC), General Services Administration (GSA), U.S. Postal Service (USPS), and the Departments of Defense, Labor, and Education (DOD, DOL, and Education)."
Date: February 8, 2006
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Commonwealth of the Northern Mariana Islands: Serious Economic, Fiscal, and Accountability Challenges (open access)

Commonwealth of the Northern Mariana Islands: Serious Economic, Fiscal, and Accountability Challenges

Testimony issued by the Government Accountability Office with an abstract that begins "The U.S. insular area of the Commonwealth of the Northern Mariana Islands (CNMI) is a self-governing commonwealth of the United States that comprises 14 islands in the North Pacific. In a December 2006 report--U.S. Insular Areas: Economic, Fiscal, and Financial Accountability Challenges (GAO-07-119)--regarding four insular areas including CNMI, GAO identified and reported the following: (1) economic challenges, including the effect of changing tax and trade laws on their economies; (2) fiscal condition; and (3) financial accountability, including compliance with the Single Audit Act. The Chairman of the Senate Committee on Energy and Natural Resources, which requested the December 2006 report, asked GAO to present and discuss the results as they pertain to CNMI. Our summary and conclusions are based on our work performed for our December 2006 report on U.S. insular areas. For this testimony we also had available CNMI's fiscal year 2005 audited financial statements, which we have included in our review, along with some recent developments in fiscal year 2006."
Date: February 8, 2007
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Federal Oversight of Food Safety: High-Risk Designation Can Bring Needed Attention to Fragmented System (open access)

Federal Oversight of Food Safety: High-Risk Designation Can Bring Needed Attention to Fragmented System

Testimony issued by the Government Accountability Office with an abstract that begins "Each year, about 76 million people contract a foodborne illness in the United States; about 325,000 require hospitalization; and about 5,000 die. While the recent E. coli outbreaks highlighted the risks posed by accidental contamination, the attacks of September 11, 2001, heightened awareness that the food supply could also be vulnerable to deliberate contamination. This testimony focuses on the (1) role that GAO's high-risk series can play in raising the priority and visibility of the need to transform federal oversight of food safety, (2) fragmented nature of federal oversight of food safety, and (3) need to address federal oversight of food safety as a 21st century challenge. This work is based on previously issued reports."
Date: February 8, 2007
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Medicare: Program Reform and Modernization Are Needed But Entail Considerable Challenges (open access)

Medicare: Program Reform and Modernization Are Needed But Entail Considerable Challenges

Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed efforts to reform the administration, structure, and financing of the Medicare Program."
Date: February 8, 2000
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Long-Term Fiscal Issues: Increasing Transparency and Reexamining the Base of the Federal Budget (open access)

Long-Term Fiscal Issues: Increasing Transparency and Reexamining the Base of the Federal Budget

Testimony issued by the Government Accountability Office with an abstract that begins "This testimony discusses the nation's long-term fiscal outlook and the challenge it poses for the budget and oversight processes. First, GAO provides results of its most recent simulations of the long-term fiscal outlook, updating a model GAO initially developed in 1992. GAO also discusses some ideas for increasing transparency of the long-term costs of government commitments and the range of fiscal exposures. Finally, GAO discusses a forthcoming report that it believes will help the Congress in dealing with a range of performance and accountability issues. This report will provide policy makers with a comprehensive compendium of those areas throughout government that could be considered ripe for reexamination and review based on GAO's past work and institutional knowledge."
Date: February 8, 2005
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Federal Power: The Evolution of Preference in Marketing Federal Power (open access)

Federal Power: The Evolution of Preference in Marketing Federal Power

A letter report issued by the General Accounting Office with an abstract that begins "Congress has enacted many statutes that designate types of customers or geographic areas for preference and priority in purchasing electricity from federal agencies. In general, the preference has been intended to (1) direct the benefits of public resources--relatively inexpensive hydropower--to portions of the public through nonprofit entities, (2) spread the benefits of federally generated hydropower widely and encourage the development of rural areas, (3) prevent private interests from exerting control over the full development of electric power on public lands, and (4) provide a yardstick against which the rates of investor-owned utilities can be measured. The applications of various preference provisions have been challenged several times in the courts, which have directed a power marketing administration (PMA) to provide power to preference customers. In other instances, they have supported the denial of power to such customers. The characteristics of the electricity industry have changed. During the last 20 years, competition has been replacing regulation in major sectors of the U.S. economy. Several proposals have come before Congress to restructure the electrical industry, including some that would encourage the states to allow retail customers a choice in …
Date: February 8, 2001
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Homeland Security: Observations on the Department of Homeland Security's Acquisition Organization and on the Coast Guard's Deepwater Program (open access)

Homeland Security: Observations on the Department of Homeland Security's Acquisition Organization and on the Coast Guard's Deepwater Program

Testimony issued by the Government Accountability Office with an abstract that begins "In January 2003, GAO designated the Department of Homeland Security's (DHS) implementation and transformation as high risk because of the size and complexity of the effort and the existing challenges faced by the components being merged into the department. The success of the effort to integrate numerous agencies and organizations into one cabinet-level department rests in large part on DHS's ability to effectively acquire the wide range of goods and services it needs to achieve its mission of protecting the nation from terrorism. DHS is undertaking a number of large, complex investments as the federal government increasingly relies on contractors for roles and missions previously performed by government employees. One of the department's largest investments--the Deepwater program, now estimated to cost $24 billion--is the Coast Guard's major effort to replace or modernize its aircraft and vessels. Rather than using a traditional acquisition approach, the Coast Guard is using a system integrator to design, construct, deploy, support, and integrate the Deepwater assets. In this testimony, the Comptroller General discussed (1) the overarching challenges DHS faces in establishing an effective acquisition organization, (2) GAO's prior work on Coast Guard and …
Date: February 8, 2007
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
World Trade Organization: Seattle Ministerial: Outcomes and Lessons Learned (open access)

World Trade Organization: Seattle Ministerial: Outcomes and Lessons Learned

Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the World Trade Organization's (WTO) 1999 ministerial conference, focusing on the: (1) outcome of the ministerial conference; (2) factors contributing to the outcome; and (3) the lessons learned from the meeting."
Date: February 8, 2000
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Health Privacy: Regulation Enhances Protection of Patient Records but Raises Practical Concerns (open access)

Health Privacy: Regulation Enhances Protection of Patient Records but Raises Practical Concerns

Testimony issued by the General Accounting Office with an abstract that begins "Advances in information technology, along with an increasing number of parties with access to identifiable health information, have created new challenges to maintaining the privacy of medical records. Patients and providers alike have expressed concern that broad access to medical records by insurers, employers, and others may result in inappropriate use of the information. Congress sought to protect the privacy of individuals' medical information as part of the Health Insurance Portability and Accountability Act of 1996 (HIPAA). HIPAA included a timetable for developing comprehensive privacy standards that would establish rights for patients with respect to their medical records and define the conditions for using and disclosing identifiable health information. The final privacy regulation offers all Americans the opportunity to know and, to some extent, control how physicians, hospitals, and health plans use their personal information. At the same time, these entities will face a complex set of privacy requirements that are not well understood at this time. Some of the uncertainty expressed by stakeholder groups reflects the recent issuance of the regulation. With time, everyone will have greater opportunity to examine its provisions and assess their implications for …
Date: February 8, 2001
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Rebuilding Iraq: Stabilization, Reconstruction, and Financing Challenges (open access)

Rebuilding Iraq: Stabilization, Reconstruction, and Financing Challenges

Testimony issued by the Government Accountability Office with an abstract that begins "The United States, along with coalition partners and various international organizations, has undertaken a challenging and costly effort to stabilize and rebuild Iraq following multiple wars and decades of neglect by the former regime. This enormous effort is taking place in an unstable security environment, concurrent with Iraqi efforts to transition to its first permanent government. The United States' goal is to help the Iraqi government develop a democratic, stable, and prosperous country, at peace with itself and its neighbors, a partner in the war against terrorism, enjoying the benefits of a free society and a market economy. In this testimony, GAO discusses the challenges (1) that the United States faces in its rebuilding and stabilization efforts and (2) that the Iraqi government faces in financing future requirements. This statement is based on four reports GAO has issued to the Congress since July 2005 and recent trips to Iraq. Since July 2005, we have issued reports on (1) the status of funding and reconstruction efforts in Iraq, focusing on the progress achieved and challenges faced in rebuilding Iraq's infrastructure; (2) U.S. reconstruction efforts in the water and sanitation …
Date: February 8, 2006
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
VA Health Care: Mild Traumatic Brain Injury Screening and Evaluation Implemented for OEF/OIF Veterans, but Challenges Remain (open access)

VA Health Care: Mild Traumatic Brain Injury Screening and Evaluation Implemented for OEF/OIF Veterans, but Challenges Remain

A letter report issued by the Government Accountability Office with an abstract that begins "Traumatic brain injury (TBI) has emerged as a leading injury among servicemembers serving in the Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF) combat theaters. The widespread use of improvised explosive devices, such as roadside bombs, in these combat theaters increases the likelihood that servicemembers will be exposed to incidents that can cause a TBI. TBIs can vary from mild to severe, and in general, mild TBI can be difficult to identify. Because mild TBI can have lasting effects if not identified and treated, concerns have been raised about how the Department of Veterans Affairs (VA) identifies and treats OEF/OIF veterans with a mild TBI. In this report GAO describes VA's (1) efforts to screen OEF/OIF veterans for mild TBI, (2) steps taken so that those OEF/OIF veterans at risk for mild TBI are evaluated and treated, and (3) challenges in screening and evaluating OEF/OIF veterans for mild TBI. GAO reviewed VA's policies, interviewed VA officials and TBI experts, and reviewed nine VA medical facilities' efforts to implement TBI screening and evaluation processes."
Date: February 8, 2008
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Developing the Physics Basis of Fast Ignition Experiments at Future Large Fusion-class lasers (open access)

Developing the Physics Basis of Fast Ignition Experiments at Future Large Fusion-class lasers

The Fast Ignition (FI) concept for Inertial Confinement Fusion (ICF) has the potential to provide a significant advance in the technical attractiveness of Inertial Fusion Energy (IFE) reactors. FI differs from conventional 'central hot spot' (CHS) target ignition by using one driver (laser, heavy ion beam or Z-pinch) to create a dense fuel and a separate ultra-short, ultra-intense laser beam to ignite the dense core. FI targets can burn with {approx} 3X lower density fuel than CHS targets, resulting in (all other things being equal) lower required compression energy, relaxed drive symmetry, relaxed target smoothness tolerances, and, importantly, higher gain. The short, intense ignition pulse that drives this process interacts with extremely high energy density plasmas; the physics that controls this interaction is only now becoming accessible in the lab, and is still not well understood. The attraction of obtaining higher gains in smaller facilities has led to a worldwide explosion of effort in the studies of FI. In particular, two new US facilities to be completed in 2009/2010, OMEGA/OMEGA EP and NIF-ARC (as well as others overseas) will include FI investigations as part of their program. These new facilities will be able to approach FI conditions much more closely …
Date: February 8, 2008
Creator: MacKinnon, A. J.; Key, M. H.; Hatchett, S.; MacPhee, A. G.; Foord, M.; Tabak, M. et al.
Object Type: Report
System: The UNT Digital Library
Overview of LDRD project 05-ERD-050: "Developing a Reactive Chemistry Capability for the NARAC Operational Model (LODI)" (open access)

Overview of LDRD project 05-ERD-050: "Developing a Reactive Chemistry Capability for the NARAC Operational Model (LODI)"

None
Date: February 8, 2008
Creator: Cameron-Smith, P; Grant, K & Connell, P
Object Type: Report
System: The UNT Digital Library
A Detailed Chemical Kinetic Reaction Mechanism for Oxidation of Four Small Alkyl Esters in Laminar Premixed Flames (open access)

A Detailed Chemical Kinetic Reaction Mechanism for Oxidation of Four Small Alkyl Esters in Laminar Premixed Flames

A detailed chemical kinetic reaction mechanism has been developed for a group of four small alkyl ester fuels, consisting of methyl formate, methyl acetate, ethyl formate and ethyl acetate. This mechanism is validated by comparisons between computed results and recently measured intermediate species mole fractions in fuel-rich, low pressure, premixed laminar flames. The model development employs a principle of similarity of functional groups in constraining the H atom abstraction and unimolecular decomposition reactions in each of these fuels. As a result, the reaction mechanism and formalism for mechanism development are suitable for extension to larger oxygenated hydrocarbon fuels, together with an improved kinetic understanding of the structure and chemical kinetics of alkyl ester fuels that can be extended to biodiesel fuels. Variations in concentrations of intermediate species levels in these flames are traced to differences in the molecular structure of the fuel molecules.
Date: February 8, 2008
Creator: Westbrook, C K; Pitz, W J; Westmoreland, P R; Dryer, F L; Chaos, M; Osswald, P et al.
Object Type: Article
System: The UNT Digital Library
Modeling Hydraulic Responses to Meteorological Forcing: fromCanopy to Aquifer (open access)

Modeling Hydraulic Responses to Meteorological Forcing: fromCanopy to Aquifer

An understanding of the hydrologic interactions amongatmosphere, land surface, and subsurface is one of the keys tounderstanding the water cycling system that supports our life system onearth. Properly modeling such interactionsis a difficult task because oftheinherent coupled processes and complex feedback structures amongsubsystems. In this paper, we present a model that simulates thelandsurface and subsurface hydrologic response to meteorological forcing.This model combines a state of the art landsurface model, the NCARCommunity Land Model version 3 (CLM3), with a variablysaturatedgroundwater model, the TOUGH2, through an internal interfacethat includes flux and state variables shared by the two submodels.Specifically, TOUGH2, in its simulation, uses infiltration, evaporation,and rootuptake rates, calculated by CLM3, as source/sink terms? CLM3, inits simulation, uses saturation and capillary pressure profiles,calculated by TOUGH2, as state variables. This new model, CLMT2,preserves the best aspects of both submodels: the state of the artmodeling capability of surface energy and hydrologic processes from CLM3and the more realistic physical process based modeling capability ofsubsurface hydrologic processes from TOUGH2. The preliminary simulationresults show that the coupled model greatly improves the predictions ofthe water table, evapotranspiration, surface temperature, and moisture inthe top 20 cm of soil at a real watershed, as evaluated from 18 years ofobserved data. The …
Date: February 8, 2007
Creator: Pan, Lehua; Jin, Jiming; Miller, Norman; Wu, Yu-Shu & Bodvarsson,Gudmundur
Object Type: Article
System: The UNT Digital Library