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Full-Text Articles in Civil and Environmental Engineering

Maine Guide To Energy Efficient Residential Construction : A Manual Of Accepted Practices, State Of Maine Energy Conservation Division Nov 1997

Maine Guide To Energy Efficient Residential Construction : A Manual Of Accepted Practices, State Of Maine Energy Conservation Division

Maine Collection

Maine Guide to Energy Efficient Residential Construction : A Manual of Accepted Practices

State of Maine Energy Conservation Division, Department of Economic and Community Development, 59 State House Station, Augusta, Maine 04333-0059

Second Edition - November, 1997

Contents: Dedication / Acknowledgements / Introduction / Part 1. Summary of Maine's Residential Energy Standards / Part 2. Siting and Initial Design Considerations / Part 3. Important Considerations for the Design Phase / Part 4. Recommended Construction Practices / Appendixes


The Detoxification Of Petroleum Contaminated Coastal Plain Sandy Soil Using An Amended Vermicomposting Approach, John Charles Kraemer Jul 1997

The Detoxification Of Petroleum Contaminated Coastal Plain Sandy Soil Using An Amended Vermicomposting Approach, John Charles Kraemer

Health Services Research Dissertations

This study explores the feasibility of utilizing an amended vermicomposting treatment approach for detoxifying petroleum hydrocarbon contaminated sandy soil. The bench-scale testing of gasoline and diesel contaminated soil using three test soil vessels and one control soil vessel was performed in a laboratory setting for a six week time period. The control soil received no treatment other than distilled water to maintain soil moisture. Treatment 1 consisted of direct application of liquid municipal biologic sludge on a weekly basis. Treatment 2 consisted of the addition of 30 Eisenia foetida earthworms and distilled water. Treatment 3 consisted of direct application of …


Greener And More Equitable: A Vision For Dams And Other Western Water Issues, Bruce C. Driver Jun 1997

Greener And More Equitable: A Vision For Dams And Other Western Water Issues, Bruce C. Driver

Dams: Water and Power in the New West (Summer Conference, June 2-4)

10 pages.

Contains 1 page of references.


The Future Of Western Water Developments, John Keys Jun 1997

The Future Of Western Water Developments, John Keys

Dams: Water and Power in the New West (Summer Conference, June 2-4)

9 pages.


River Management In The Twenty-First Century: The Vision Thing, A. Dan Tarlock Jun 1997

River Management In The Twenty-First Century: The Vision Thing, A. Dan Tarlock

Dams: Water and Power in the New West (Summer Conference, June 2-4)

12 pages.

Contains references.


Of Dams And Salmon In The Columbia/Snake Basin: Did You Ever Have To Make Up Your Mind?, Don B. Miller Jun 1997

Of Dams And Salmon In The Columbia/Snake Basin: Did You Ever Have To Make Up Your Mind?, Don B. Miller

Dams: Water and Power in the New West (Summer Conference, June 2-4)

106 pages (includes illustrations and maps).

Contains 4 pages of references.


Klamath Basin: Balancing Instream Flows With Irrigation And Power, Carl Ullman Jun 1997

Klamath Basin: Balancing Instream Flows With Irrigation And Power, Carl Ullman

Dams: Water and Power in the New West (Summer Conference, June 2-4)

15 pages (includes illustrations and maps).


Initiatives And Conflicts In Changing Federal Facility Operation, Lawrence J. Macdonnell Jun 1997

Initiatives And Conflicts In Changing Federal Facility Operation, Lawrence J. Macdonnell

Dams: Water and Power in the New West (Summer Conference, June 2-4)

18 pages.

Contains references.


Glen Canyon Dam: Flood Flows And Adaptive Management In The Lower Colorado River Basin: Response, Joe Hunter Jun 1997

Glen Canyon Dam: Flood Flows And Adaptive Management In The Lower Colorado River Basin: Response, Joe Hunter

Dams: Water and Power in the New West (Summer Conference, June 2-4)

9 pages.

Contains references.


Environmental Benefits Of Reoperation, Relicensing, Decommissioning And Recapture, Richard Roos-Collins Jun 1997

Environmental Benefits Of Reoperation, Relicensing, Decommissioning And Recapture, Richard Roos-Collins

Dams: Water and Power in the New West (Summer Conference, June 2-4)

35 pages.

Contains footnotes.


Glen Canyon Dam: Flood Flows And Adaptive Management In The Lower Colorado River Basin, Edmund D. Andrews Jun 1997

Glen Canyon Dam: Flood Flows And Adaptive Management In The Lower Colorado River Basin, Edmund D. Andrews

Dams: Water and Power in the New West (Summer Conference, June 2-4)

11 pages.

Contains 2 pages of references.


Integrating New Values With Old Uses In The Relicensing Of Kingsley Dam And Related Facilities (Making Part Of The Problem A Part Of The Solution), Margot Zallen Jun 1997

Integrating New Values With Old Uses In The Relicensing Of Kingsley Dam And Related Facilities (Making Part Of The Problem A Part Of The Solution), Margot Zallen

Dams: Water and Power in the New West (Summer Conference, June 2-4)

21 pages (includes illustrations and map).


Agenda: Dams: Water And Power In The New West, University Of Colorado Boulder. Natural Resources Law Center Jun 1997

Agenda: Dams: Water And Power In The New West, University Of Colorado Boulder. Natural Resources Law Center

Dams: Water and Power in the New West (Summer Conference, June 2-4)

Conference organizers and/or speakers included University of Colorado School of Law professors David H. Getches, Douglas S. Kenney, Kathryn M. Mutz, Elizabeth Ann (Betsy) Rieke, Charles F. Wilkinson and Lawrence J. MacDonnell.

The keynote address by Charles F. Wilkinson is titled Coming to Grips with Growth in the West: Traditional Communities, Free Rivers and the New Megalopoli, and it will be held on Monday, June 2, at 12:30 p.m. in the Lindsley Memorial Courtroom of the law school. Wilkinson is a noted law professor, writer and authority on Western issues.

The conference will begin by providing historical context for the …


Artificial Recharge In The Las Vegas Valley: An Operational History, Michael Johnson, Erin Cole, Kay Brothers, Las Vegas Valley Water District Jun 1997

Artificial Recharge In The Las Vegas Valley: An Operational History, Michael Johnson, Erin Cole, Kay Brothers, Las Vegas Valley Water District

Publications (WR)

Artificially recharging the Las Vegas Valley (Valley) ground-water system with treated Colorado River water is one water resource management option employed by the Las Vegas Valley Water District (District) to help meet future long-term and short-term peak water demands. The District began operation of an artificial ground-water recharge program in 1988 in order to bank water for future use and to slow declining water levels. Artificial recharge occurs in the winter months, typically from October to May, when there is excess capacity in the Southern Nevada Water System (SNWS), currently a 400 Million Gallon per Day (MGD) treatment and transmission …


The Study Of Permeability In Concrete, Jie Yuan May 1997

The Study Of Permeability In Concrete, Jie Yuan

Theses

In this study, samples of regular, high performance, expansive and the polymer concrete and mortar were prepared for test of permeability and mechanical property. In the permeability measurement, water and an aqueous chemical solution were employed as the permeant.

The test results of the samples, ranging from 5.7 x 10-9 cm/sec to 1.0 x cm/sec for the permeability and 3800 psi to 10600 psi for compression strength, indicated that the polymer coated concrete has the lowest permeability among the concretes and high performance concrete has the highest compression strength . The finding leads to the possibility that a high strength …


An Analytical Approach To Toxic Substance Replacement In Support Of Pollution Prevention, Ithan B. Zimmer May 1997

An Analytical Approach To Toxic Substance Replacement In Support Of Pollution Prevention, Ithan B. Zimmer

Theses

In support of pollution prevention and in accordance with Executive Order 12356 concerning pollution prevention, all federal agencies must comply with the Toxic Release Inventory (TRI) chemical release reduction and pollution prevention planning. The inventory lists hundreds of chemicals and choosing those to replace and finding actual replacement chemicals or procedures is not always clear. This study focuses on an analytical approach to this problem by understanding the application of two substances. The representative chemicals are two volatile organic compounds (VOC), ethyl ether and ethanol, used as solvents in ammunition manufacturing.

Thirteen military specifications provide the cases involving ether. Ethanol's …


Enhancing The Bioavailability Of Sorbed Pollutants From Sediments Using Ultrasound, Rachel Mathew May 1997

Enhancing The Bioavailability Of Sorbed Pollutants From Sediments Using Ultrasound, Rachel Mathew

Theses

Many organic compounds, that enter aquatic systems have a strong tendency to sorb onto particulate matter which may be present in suspension or as sediment. Numerous studies have shown that the sediment in aquatic systems concentrate contaminants several orders of magnitude greater than the concentration in the aqueous phase. Particulate associated contaminants in sediments are not easily bioavailable. Hence the efficacy of any treatment technology would be strongly undermined if the contaminants are not made available for microbial utilization. Sediment associated contaminants can be made biologically available to various microorganisms under certain conditions.

In this study, desorption studies were conducted …


Evaluation Of Environmental Characteristics Of Wtp Residuals For Disposal In Monofills, Ping Tian Jan 1997

Evaluation Of Environmental Characteristics Of Wtp Residuals For Disposal In Monofills, Ping Tian

Dissertations

Disposal of water treatment plant (WTP) have raised great concerns due to the stringent water quality standards and environmental regulations, and limited availability of land for ultimate disposal. The ultimate disposal of water treatment plant residuals by using monofill may be one of the most economical, and feasible options. Design and operation of such a monofill will be simple because of the uniformity of the characteristics of WTP residuals.

The objectives of this project were to determine the environmental characteristics of WTP residuals and to apply these characteristics for the design of monofills and development of the metal leaching model …


A Methodology For The Design Of An Integrated Air Stripping/Biofiltration Process To Clean Contaminated Aquifers, Pothitos Ioannis Stamatiadis Jan 1997

A Methodology For The Design Of An Integrated Air Stripping/Biofiltration Process To Clean Contaminated Aquifers, Pothitos Ioannis Stamatiadis

Theses

This thesis deals with the conceptual design of an integrated air stripping/biofiltration process for cleaning aquifers contaminated with volatile organic pollutants. In this technology, the pollutant is transferred from the aquifer to an air stream which is subsequently treated in a biofilter. The work presented here is an effort to develop a design methodology for the integrated process and suggests a general, quantitative approach which can be used in preliminary technology evaluation. This methodology involves relatively simple equations for the stripping process and detailed (oftentimes complex) models for biofiltration under conditions of continuous variation of the properties of the polluted …


The Influence Of The Wastewater Drainage From The Las Vegas Valley On The Limnology Of Boulder Basin, Lake Mead, Nevada-Arizona, James F. Labounty, Michael J. Horn, Bureau Of Reclamation Jan 1997

The Influence Of The Wastewater Drainage From The Las Vegas Valley On The Limnology Of Boulder Basin, Lake Mead, Nevada-Arizona, James F. Labounty, Michael J. Horn, Bureau Of Reclamation

Publications (WR)

Lake Mead, Colorado River, Arizona-Nevada, is one of the most heavily used reservoirs in the western United States, providing abundant recreational opportunities as well as downstream domestic and agricultural water for over 22 million users. Based on average nutrient levels and productivity, Lake Mead is classified as mildly mesotrophic. The interflow of the Colorado River dominates the limnology of much of the 106 km-long reservoir, and may still be identified at Hoover Dam under certain conditions. The lower basin of Lake Mead ending at Hoover Dam is known as Boulder Basin and is near the Las Vegas metropolitan area. Las …


The Effect Of Varying Temperature, Flux And Pretreatment On The Microfiltration Of Lake Michigan Water, Karen Linda Kopp Jan 1997

The Effect Of Varying Temperature, Flux And Pretreatment On The Microfiltration Of Lake Michigan Water, Karen Linda Kopp

Retrospective Theses and Dissertations

This study investigated microfiltration of Lake Michigan Water for the production of drinking water. A 60 gpm Memcor microfiltration pilot plant was operated for nine months at Manitowoc, Wisconsin to determine and model the performance characteristics of a microfiltration pilot plant for varying surface water conditions. Statistical regression and modeling was used to determine and develop quantitative relationships between time of operation and several operational variables for water quality and productivity. Modifications of Darcy's Law and flux decline data were used to develop a model relating temperature and flux to cleaning frequency. Statistical hypothesis testing and associated modeling were used …


Runoff, Erosion, And Soil Quality Characteristics Of A Former Conservation Reserve Program Site, John E. Gilley, John W. Doran, Douglas Karlen, T. C. Kaspar Jan 1997

Runoff, Erosion, And Soil Quality Characteristics Of A Former Conservation Reserve Program Site, John E. Gilley, John W. Doran, Douglas Karlen, T. C. Kaspar

Department of Agricultural and Biological Systems Engineering: Faculty Publications

No-till and moldboard plow tillage systems were established on a former Conservation Reserve Program (CRP) site in southwest Iowa. Runoff rates from simulated rainfall events were significantly greater on sites returned to crop production than from adjoining, undisturbed CRP areas. Substantial soil loss was measured from the moldboard plow treatments, but no significant differences in erosion rates were found between the undisturbed CRP and no-till management systems. No-till management maintained levels of soil quality similar to those of CRP by preserving soil structural integrity and reducing losses of soil organic matter (SOM) associated with tillage. Conservation tillage systems which maintain …


A Cultural Resource Investigation Of Two Louisiana-Pacific Corporation Parcels, Susie Van Kirk Dec 1996

A Cultural Resource Investigation Of Two Louisiana-Pacific Corporation Parcels, Susie Van Kirk

Susie Van Kirk Papers

During the month of October, November, and December 1996, a Cultural Resources Investigation was conducted on two Louisiana-Pacific Corporation parcels located at Big Lagoon, Humboldt County, California (see Map 1). The survey was requested by Jamie Heltsley of Ron Hunt Surveying & Forestry, Arcata, California. Proposed project plans include the combining of four separate assessors parcels into two assessor's parcels.

The purposes of this investigation were to (1) locate and record project area cultural resources; (2) to evaluate the significance of study area cultural resources; (3) to assess potential impacts to cultural resources resulting from project related operations; (4) to …


Investigation Of Sorption Mass Transfer Models Using Synthetic Soils, Karla K. Mika Dec 1996

Investigation Of Sorption Mass Transfer Models Using Synthetic Soils, Karla K. Mika

Theses and Dissertations

Grain-scale sorption mass transfer is an important process that must be considered when predicting clean-up time and choosing remediation techniques for subsurface hazardous waste contamination. Rate-limited sorption is responsible for the rebound effect, where remediated groundwater is recontaminated by desorption. Sorbed contaminants are not available for microbial degradation, and the desorption rate may govern the effectiveness of natural attenuation by biodegradation. Grain-scale sorption nonequilibrium is generally attributed to diffusive transport, either in SOM or in mineral micropores. Typically used sorption mass transfer models either fail to reproduce long-term slow desorption (first-order models), or are based on diffusion in assumed (often …


Environmental Restoration Project, Peer Review Process Assessment, Paul A. Schantz Dec 1996

Environmental Restoration Project, Peer Review Process Assessment, Paul A. Schantz

Theses and Dissertations

Installation Restoration Program (IRP) projects often cost over $250 thousand, and projects over $1.5 million are common. To ensure these projects are risk based, technically sound, and cost effective, the Air Force instituted a peer review program in 1992. The objective of this research is to describe and analyze the peer review process. Through triangulation of data from interviews, observations, official and academic documents, and surveys, seven constructs were discovered: focus, agenda, facilitator, written preparation, oral presentation, team characteristics, and reviewer characteristics. A questionnaire was used to gather perceptions of peer review effectiveness--the criterion variable--and of the seven constructs. A …


Development Of Synthetic Soils For Sorption Mass Transfer Model Validation, Thomas P. De Venoge Dec 1996

Development Of Synthetic Soils For Sorption Mass Transfer Model Validation, Thomas P. De Venoge

Theses and Dissertations

Existing sorption models often fail to describe grain scale sorption because of an inability to define the diffusion domain. A proposed improved model required testing to determine model validity. The testing method used a synthetic media of known geometry such that the distribution of sorption sites was known. Sorption rate data was obtained using batch experiments with the media. Data was used in comparison against model predicted rates. Fined sorption site distributions were compared to real distributions obtained by controlling sorbent geometries. Comparison determined model performance in fitting known distributions. The focus of this study was to (1) determine what …


Study Of Desorption Of Contaminant From Synthetic Soil, Kung-Fu Hwang Dec 1996

Study Of Desorption Of Contaminant From Synthetic Soil, Kung-Fu Hwang

Theses and Dissertations

A better understanding of sorption and desorption processes could improve estimates of time and cost required for remedial activities, exposure times and health risk, and bioavailability. Conventional rate-limited sorption models do not accurately define the diffusion domain at the grain scale. Heyse (1994) proposed the multiple sites in series (MSS) model, which allows more general description of the geometry of the sorption domain than the classical spherical or discrete distributions. A version of this model was tested by deVenoge (1996). The model was able to accurately simulate sorption rate data, but could not estimate unique geometry parameters. This research is …


A Comparative Analysis Of Two Alternatives To Chemical Aircraft Paint Stripping, George P. Joyce Ii Dec 1996

A Comparative Analysis Of Two Alternatives To Chemical Aircraft Paint Stripping, George P. Joyce Ii

Theses and Dissertations

The Air Force must periodically strip and paint its aircraft to prevent the damaging effects of corrosion. The paint removal process typically involves the use of toxic chemicals such as methylene chloride which are soon to be banned as a result of impending environmental regulations and increased costs associated with handling and disposing of such material. The Air Force must choose an alternative to methylene chloride chemical stripping which complies with environmental regulations and reduces costs. This thesis compares the life cycle costs and environmental impacts of two alternatives to chemical aircraft stripping. Plastic Media Blasting (PMB) and Modified Medium …


Modeling Plant Uptake Of Metal In Constructed Wetlands Supported By Experimentally Derived Uptake Rates, Michael B. Peake Dec 1996

Modeling Plant Uptake Of Metal In Constructed Wetlands Supported By Experimentally Derived Uptake Rates, Michael B. Peake

Theses and Dissertations

Many communities and Air Force installations are using constructed wetlands to filter trace metals from their stormwater runoff. Constructed wetlands are attractive to industry for runoff mitigation because they are relatively cheap to build and operate and require little or no energy for operation. The purpose of this research project is to develop quantitative concepts for understanding the dynamics of metal uptake in constructed wetland plants by constructing a system dynamics model supported by experimental observation and offer environmental managers a tool to simulate, under a broad range of conditions, long term wetland exposure to stormwater runoff contaminated with trace …


Development Of Site Characterization Simulator Specifications, Jeffrey L. Heiderscheidt Nov 1996

Development Of Site Characterization Simulator Specifications, Jeffrey L. Heiderscheidt

Theses and Dissertations

The purpose of this study was to develop a tool for evaluating data quality when characterizing a potentially contaminated groundwater aquifer, and to provide a basis for developing a simulator to allow environmental managers and engineers to practice and learn about the site characterization process. Specifically, this study characterized the uncertainty, estimation block size, and cost for the various methods of determining the value of each geological, hydrological, and contaminant parameter necessary to characterize a site. Research entailed identifying site characterization objectives and identifying parameters necessary to obtain those objectives. Methods of estimating each parameter were identified, then research was …