Civil and Environmental Engineering Commons^™

Optimizing Separate Phase Light Hydrocarbon Recovery From Contaminated Unconfined Aquifers, G. S. Cooper, Richard C. Peralta, Jagath J. Kaluarachchi

Civil and Environmental Engineering Faculty Publications

A modeling approach is presented that optimizes separate phase recovery of light non-aqueous phase liquids (LNAPL) for a single dual-extraction well in a homogeneous, isotropic unconfined aquifer. A simulation/regression/optimization (S/R/O) model is developed to predict, analyze, and optimize the oil recovery process. The approach combines detailed simulation, nonlinear regression, and optimization. The S/R/O model utilizes nonlinear regression equations describing system response to time-varying water pumping and oil skimming. Regression equations are developed for residual oil volume and free oil volume. The S/R/O model determines optimized time-varying (stepwise) pumping rates which minimize residual oil volume and maximize free oil recovery while …

Evaluation Of The Us Epa Recommended Approach To Predicting Air Emissions From Pulp And Paper Industry Landfills, Samuel A. Vigil

Civil and Environmental Engineering

There is growing indication that the pulp and paper industry will be required to comply with Clean Air Act (Title V) requirements to estimate emissions of bulk bases and HAPs from landfills. One method of such estimation is through the use of the Landfill Air Emissions Estimation Model (LAEEM), which was developed and calibrated specifically for municipal solid waste (MSW) landfills. The industry is concerned with the applicability of LAEEM because the nature of the materials placed in industry landfills is considered to be so different from those in MSW landfills, that emissions will likely be lower than model predictions. …

Energy Efficient Resource Recovery Project, Daniel Panetta, Douglas Williams, Walter Bremer, Gary Karner, Harap Mallareddy, Margot Mcdonald, Samuel A. Vigil, Bailey Green, Henry Hammer, William J. Oswald, William Roley, Jr.

Civil and Environmental Engineering

No abstract provided.

Period Formulas For Concrete Shear Wall Buildings, Rakesh K. Goel, Anil K. Chopra

Civil and Environmental Engineering

Most seismic codes specify empirical formulas to estimate the fundamental vibration period of buildings. Evaluated first in this paper are the formulas specified in present U.S. codes using the available data on the fundamental period of buildings "measured" from their motions recorded during eight California earthquakes, starting with the 1971 San Fernando earthquake and ending with the 1994 Northridge earthquake. It is shown that current code formulas for estimating the fundamental period of concrete shear wall buildings are grossly inadequate. Subsequently, an improved formula is developed by calibrating a theoretical formula, derived using Dunkerley's method, against the measured period data …

Ole Miss Engineer 1998

Ole Miss Engineer

No abstract provided.

Evaluation Of Corrugated Steel Pipe Culverts On Ky 61, Cumberland County, L. John Fleckenstein, David L. Allen, Brad W. Rister

Kentucky Transportation Center Research Report

In February of 1998, the Kentucky Transportation Cabinet requested that the Kentucky Transportation Center investigate three corrugated metal pipe culverts on the relocation project of KY 61. The pipes were installed in June and July of 1997. The embankments over the three pipes were completed In October of 1997. Based on the information that was gathered, it appears that the pipes were manufactured according to specifications. The gage of the pipe is on the lower end of acceptance. The pipes appear to have been well aligned and properly bedded. Some of the dents and buckles in the pipe may have …

A Report On County Road Program Finance, Patsy Anderson, Kris Koehler

Kentucky Transportation Center Research Report

This report reflects the findings of a study of county road finance in Kentucky. Statistics contained in the report were derived from financial statements submitted by the counties to the Kentucky Department of Local Government.

Investigation And Analysis Of Heavy Truck Accidents, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

The objectives of this study were to investigate and analyze traffic accidents involving trucks and to study the relationship between heavy loads and truck braking efficiency. Field tests were made to determine the effect of increased loads on the ability of a truck to brake to a stop and determine if the trucks could meet the requirements of the Federal Motor Carrier Safety Regulations. The test combination truck with a gross weight of up to 151,180 was able to meet both braking distance and maximum G requirements. The test single-unit truck failed to meet requirements only at the maximum weight …

Performance Evaluation Of Recycled Pcc Pavement Used As A Crushed Stone Base And Dense Grade Aggregate, Mike Shull, David L. Allen, L. John Fleckenstein, Clark Graves, David Q. Hunsucker

Kentucky Transportation Center Research Report

Kentucky Highway Investigative Task No. 24, "Recycled Concrete Pavement", (SSP-059-7965) involved the use of Recycled/Crushed Portland Cement Concrete (RPCC) for use as Crushed Stone Base (CSB) on the Thomas More Parkway in Kenton County, Kentucky. The Parkway, which connects Dudley Road to South Loop Road in front of the Thomas More College campus, was the first roadway to be built in Kentucky using recycled Portland Cement Concrete for crushed stone base. The Kentucky Transportation Center was requested to evaluate the material's performance versus the normal limestone CSB and make appropriate recommendations. Both field and laboratory testing were required, along with …

A Calibrated Shoreline Change Model For The Southeast Atlantic Ocean Coast Of Virginia, Prasert Vangsantitrakul

Civil & Environmental Engineering Theses & Dissertations

The idea that the long-term historic shoreline change at a given site is mainly caused by spatial gradients in the net longshore sediment transport is generally accepted. The position changes of the coastline can therefore be modeled by calculating the coastal erosion or accretion from the longshore sediment transport. This study used the GENESIS software program, one-line model, to simulate and calibrate the long-term shoreline change of the southeast coast of Virginia from 1925 to 1980. The study reach covers 45- km from Cape Henry to the Virginia-North Carolina border.

This study experienced the lack of certain important historic data …

Fiber-Reinforced Plastic Composite Beam Stability And Load And Resistance Factor Design Approach, Mojtaba B. Sirjani

Civil & Environmental Engineering Theses & Dissertations

Fiber Reinforced Plastic (FRP) structural members are rapidly gaining impetus in civil engineering applications. Also, thin-walled open beams with I-shaped, channel, and other types of sections are of practical importance to both structural analysts and designers. This dissertation presents the outcome of a detailed experimental and theoretical investigation of the strength and stability of FRP composite beams. Three- and four-point loading tests are conducted on FRP I- and channel section beams. The behavior of these beams is studied under gradually increasing static loads up to the maximum load-carrying capacity corresponding to either material cracking or flexural-torsional instability. First, the theoretical …

Sparse Equation-Eigen Solvers For Symmetric/Unsymmetric Positive-Negative-Indefinite Matrices With Finite Element And Linear Programming Applications, Hakakizumwami Birali Runesha

Civil & Environmental Engineering Theses & Dissertations

Vectorized sparse solvers for direct solutions of positive-negative-indefinite symmetric systems of linear equations and eigen-equations are developed. Sparse storage schemes, re-ordering, symbolic factorization and numerical factorization algorithms are discussed. Loop unrolling techniques are also incorporated in the coding to enhance the vector speed. In the indefinite solver, which employs various pivoting strategies, a simple rotation matrix is introduced to simplify the computer implementation. Efficient usage of the incore memory is accomplished by the proposed "restart memory management" schemes. A sparse version of the Interior Point Method, IPM, has also been implemented that incorporates the developed indefinite sparse solver for linear …

Bikeways Guide, Jay Grossman

Indiana Local Technical Assistance Program (LTAP) Publications

This guide is intended to familiarize counties and cities with the basic aspects of bicycle facilities.

Bs News

Building Services Engineering

No abstract provided.

Pavement Thickness Evaluation By Gpr Survey In Idaho, Joseph C. Sener, Robert M. Smith, Michael D. Garz, George A. Murgel, Robert W. Hamilton, David R. Haws

Civil Engineering Faculty Publications and Presentations

In 1995 and 1996, the Idaho Transportation Department (lTD) conducted a series of ground-penetrating radar (GPR) surveys as a nondestructive testing (NDT) method to evaluate the thickness of asphalt and Portland cement concrete (AC/PCC) pavements in Idaho. GPR surveys employed both air-coupled and combination air and ground coupled systems with their associated equipment and software. A total of 30 miles of AC/PCC pavements were evaluated by GPR surveys. The results obtained were correlated with the site-specific ground-truth data from borings.

Knowledge of pavement layer thickness is needed to predict pavement performance, establish load carrying capacities and develop maintenance and rehabilitation …

A Review On The Documentation For The South Florida Water Management Model (Sfwmm), Daniel P. Loucks, Wendy D. Graham, Conrad D. Heatwole, John W. Labadie, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

Early in February 1998, the South Florida Water Management District asked Professors Wendy D. Graham, Comad D. Heatwole, John W. Labadie, Daniel P. Loucks, and Richard C. Peralta to serve on a panel to

• Review the Draft Documentation for the South Florida Water Management Model (SFWMM),

• Develop a series of questions, issues and areas for discussion during a site visit,

• Visit the District for a model familiarization session, and

• Prepare and submit a written evaluation of the model, with emphasis on the documentation that will include criticisms, specific recommendations for improvement, and responses to questions posed.

Disclaimer And Acknowledgments, University Of Missouri - Rolla

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Past Proceedings: Fourth International Conference On Case Histories In Geotechnical Engineering, St. Louis (1998), Multiple Authors

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

No abstract provided.

Meet The Speakers, Multiple People

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Preface, Shamsher Prakash

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Fourth International Conference On Case Histories In Geotechnical Engineering, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Authors Index, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Meet Our Authors, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Organizing Committee, Multiple Members

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Exhibitors, Multiple People

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Participant List, Multiple Participants

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984), Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988), Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

List Of Sessions, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Estimating Post-Liquefaction Displacements In Embankment Dams And Priorities Remediation Measures, W. D. Liam Finn

International Conference on Case Histories in Geotechnical Engineering

Large displacement analysis is used to simulate the failures of flood protection dikes in Hokkaido, Japan, which occurred during the 1993 Kushiro-oki earthquake. These studies served to validate the method of analysis. The analysis was then used to predict displacements in dikes with potential for liquefaction by relating displacements to geometric characteristics of the dikes: height, slopes, and thickness of potentially liquefiable layer. The predictions were verified using dike displacement data from the Nansei-oki earthquake of 1994. The basis for reliable post-liquefaction analysis is a good estimate of the residual strength of the liquefied soils. For this reason, recent developments …