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A METHOD FOR ASSESSING RESIDUAL NAPL BASED ON ORGANIC-CHEMICAL CONCENTRATIONS IN SOIL SAMPLES

GROUND WATER MONITORING AND REMEDIATION 1991年第2期11卷 128-136页

作者： FEENSTRA, S MACKAY, DM CHERRY, JA Stan Feenstra is a hydrogeochemist and president of Applied Groundwater Research Ltd. in Mississauga Ontario He received a B.Sc. in earth sciences and an M.Sc. in hydrogeology from the University of Waterloo in 1978 and 1980 respectively and was designated a Certified Ground Water Professional by AGWSE in 1989. Since 1980 he has been a ground water consultant with Golder Associates in Mississauga Ontario and Zenon Environmental in Burlington Ontario and founded Applied Groundwater Research Ltd. in 1987. Feenstra specializes in the hydrogeochemical evaluation of ground water contamination at waste disposal facilities and chemical spill sites. He is currently a Ph.D. candidate in hydrogeology and research associate in the Waterloo Centre for Ground Water Research at the University of Waterloo (Waterloo Ontario N2L 3G1) and is involved in research related to the behavior of dense organic solvents in ground water. Douglas M. Mackay is an adjunct professor at the Waterloo Centre for Groundwater Research at the University of Waterloo Waterloo Ontario (N2L3G1). Dr. Mackay received a B.S. in engineering and M.S. and Ph.D. in civil engineering from Stanford University in 1970 1973 and 1981 respectively. From 1986 to 1990 he was a faculty member of the Environmental Science and Engineering Program of the UCLA School of Public Health. His research focuses on field studies of transport and fate of organic chemicals in ground water various scale studies of decontamination of soil and ground water and ground water monitoring technologies. John A. Cherry is a professor at the Waterloo Centre for Groundwater Research at the University of Waterloo Waterloo Ontario (N2L 3G1). He received his B.S. in geological engineering from the University of Saskatchewan in 1962. He received his M.S. from the University of California at Berkeley in 1964 and his Ph.D. from the Department of Geology at the University of Illinois in 1966. His research interests include the field study and modeling of contaminants in ground wat

Ground water contamination by non-aqueous phase liquid (NAPL) chemicals is a serious concern at many industrial facilities and waste disposal sites. NAPL in the form of immobile residual contamination, or pools of mobile or potentially mobile NAPL, can represent continuing sources of ground water contamination. In order to develop rational and cost-effective plans for remediation of soil and ground water contamination at such sites, it is essential to determine if non-aqueous phase liquid (NAPL) chemicals are present in the subsurface and delineate the zones of NAPL contamination. The presence of NAPL pools may be evident as a floating or sinking phase in monitoring wells. The residual NAPL contamination may be identified in soil samples if residual contents are high and contaminated zones in the soil cores are thick. However, visual identification may not be effective if residual contents ar elow or if the NAPL residual is distributed heterogeneously in the samples. The chemical analysis of soil samples provides a measure of the total chemical concentration in the soil but cannot determine directly whether NAPL is present in the samples. Qualitatively, soil analyses that exhibit chemical concentrations in the percent range or > 10,000 mg/kg would generally be considered to indicate the presence of NAPL. However, the results of soil analyses are seldom used in a quantitative manner to assess the possible presence of residual NAPL contamination when chemical concentrations are lower and the presence of NAPL is not obvious. The assessment of the presence of NAPL in soil samples is possible using the results of chemical and physical analyses of the soil, and the fundamental principles of chemical partitioning in unsaturated or saturated soil. The method requires information on the soil of the type typically considered in ground water contamination studies and provides a simple tool for the investigators of chemical spill and waste disposal sites to assess whether soil

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CORRELATION OF THE COMPONENTS OF WIND-LOADING ON TALL BUILDINGS

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JOURNAL OF WIND engineering AND INDUSTRIAL AERODYNAMICS 1988年第1-3期28卷 351-360页

作者： THORODDSEN, ST PETERKA, JA CERMAK, JE Graduate Student Fluid Mechanics and Wind Engineering Program Colorado State University Fort Collins Colorado USA Professor Department of Civil Engineering Fluid Mechanics and Wind Engineering Program Colorado State University Fort Collins Colorado USA University Distinguished Professor Fluid Mechanics and Wind Engineering Colorado State University Fort Collins Colorado USA

The correlation of the three moment components of wind loading on high-rise buildings is studied. Wind-tunnel measurements of two overturning moments and a torsional moment were used to calculate cross-correlations, joint-probability densities and coherence between all three components. Four different building cross-sectional shapes were studied. The overturning moment loading on two rectangular buildings were found to be not significantly correlated. Wind loading on a parallelogram and a triangle was highly correlated between all three components. Surrounding buildings may in some cases increase the correlation.

关键词： Buildings

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FLOW VARIABLE DISCHARGE PERMITS

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JAWRA Journal of the American Water Resources Association 1987年第5期23卷 761-766页

作者： Noss, Richard R. Gladstone, Ileen Respectively Assistant Professor of Civil Engineering Environmental Engineering Program Department of Civil Engineering University of Massachusetts Amherst Massachusetts 01003 and Environmental Engineer SEA Consultants Cambridge Massachusetts.

ABSTRACT: Current approaches to calculating discharge limitations and the use and intent of water quality standards are examined. Flow variable discharge permits, in which the amount of pollutant that may be discharged is based on the magnitude of the flow in the stream, are introduced as an alternative permit strategy that could reduce the cost of pollution control in certain instances while still meeting in‐stream water quality objectives. Several possible designs of flow variable discharge permits are presented to show the flexibility of the concept;for example, permits can be based on instantaneous flows, seasonal flows, trigger values, and ranges of flows. Copyright © 1987, Wiley Blackwell. All rights reserved

关键词： discharge permits point sources water quality water quality standards

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PARAMETER ESTIMATION FOR TPLN DISTRIBUTION FOR FLOOD FREQUENCY ANALYSIS

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JAWRA Journal of the American Water Resources Association 1987年第6期23卷 1185-1189页

作者： Singh, Vijay P. Singh, Kulwant Respectively Professor and Coordinator Water Resources Program and Graduate Student Department of Civil Engineering Louisiana State University Baton Rouge Louisiana 70803–6405.

ABSTRACT: The principle of maximum entropy (POME) was used to derive an alternative method for parameter estimation for the three parameter lognormal (TPLN) distribution. Six sets of annual peak discharge data were used to evaluate this method and compare it with the methods of moments and maximum likelihood estimation. Copyright © 1987, Wiley Blackwell. All rights reserved

关键词： entropy frequency analysis parameter estimation principle of maximum entropy relative error statistics surface water hydrology

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GRADUATE EDUCATION IN WATER RESOURCES: AN INNOVATIVE APPROACH Part II: Post‐Production Techniques

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JAWRA Journal of the American Water Resources Association 1987年第5期23卷 803-807页

作者： Welford, Virginia C. Block, Richard A. Bulkley, Jonathan W. Respectively Water Resource Specialist Tucson Active Management Area Arizona Department of Water Resources 310 South Meyer Tucson Arizona 85701 Public Program Coordinator World Wildlife Fund Washington D.C. 20037 (formerly Associate Director Integrative Studies Center The School of Natural Resources The University of Michigan) and Professor of Natural Resources and Professor of Civil Engineering 2506 B Dana Bldg. School of Natural Resources University of Michigan Ann Arbor Michigan 48109.

ABSTRACT: The production of a documentary video in a graduate seminar offers advantages over the traditional term paper. These advantages derive from the nature of the videotape medium. The most distinct difference between a written document and a video production is the use of the video camera to record events. In using the camera, the student is required to become involved both in front of the video camera, for example, as an interviewer, and behind the camera as a camera operator. Next, as an editor, the student is required to review the events that she/he has taped for inclusion in the final product. By participating in these three roles, the student has the opportunity to learn interviewing skills while interacting with professionals in the field, to learn videotaping skills, and to see him/herself as he/she appears to others. The student can use the video feedback to improve his/her professional presentation;posture, dress, gestures, speech, and facial expressions all have an impact on how we are perceived by others. Additionally, the painstaking process of reviewing the taped material leads to an intimate knowledge of the topic, and the process of choosing portions out of entire interviews hones the ability to select the crucial or central themes and ideas from any discussion. Finally, the power of video lies in its ability to communicate information to a wide audience. Although the nature of video for the general public does not permit highly detailed or rigorous coverage of any topic, it is a major source of information. Accordingly, video is an important tool that can be used to inform the public about the importance of wise water resource management. Copyright © 1987, Wiley Blackwell. All rights reserved

关键词： communication skills graduate studies Great Lakes Michigan Sea Grant shipping The University of Michigan videotape water quality water resources education

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RELIABILITY-BASED FATIGUE DESIGN FOR SHIP STRUCTURES

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NAVAL ENGINEERS JOURNAL 1987年第3期99卷 135-149页

作者： WHITE, GJ AYYUB, BM Gregory J. White: LCdr. USNR-R is an assistant professor of naval architecture at the U.S. Naval Academy. He received a B. S. degree in engineering mechanics from Vanderbilt University in 1975 an M. E. degree in naval architecture from the University of California Berkeley in 1981 and a Ph.D. from the University of Maryland in 1986. Dr. White served on active duty with the U.S. Navy from 1975 to 1979 first as the damage control assistant aboard the USS Reasoner (FF-1063) and then as the commissioning CIC officer aboard the USS Merrill (DD-976). After leaving active duty and while attending graduate school he worked at Mare Island Naval Shipyard in the scientific section (Code 250.1). Upon completion of graduate school he then worked for Exxon International Company as a research engineer in the R & D division of the tanker department. A lieutenant commander in the Ready Reserve Dr. White drills with the repair department of a submarine tender reserve unit and recently completed the reserve engineering duty officer qualification program. A member of ASNE since 1983 Dr. White is also a member of SNAME and the U.S. Naval Institute Dr. White received the “Jimmie” Hamilton Award for 1985. Bilal M. Ayyub:is currently an assistant professor of civil engineering at the University of Maryland. He received his B. S. degree in civil engineering from the University of Kuwait in 1980. He completed both his M. S. (1981) and Ph.D. (1983) in civil engineering at the Georgia Institute of Technology. While there he was awarded the Kuwait Foundation for the Advancement of Science Fellowship. Dr. Ayyub has extensive background in risk-based analysis and design simulation pre-stressed composite steel girders and construction engineering. He is engaged in research work involving structural reliability bridges marine structures mathematical modelling using the theories of probability statistics and fuzzy sets. His research work is sponsored by the National Transportation Safety Board the University of Maryland the Natio

In the continuing effort to apply reliability methods to marine structures, the next logical step is to include these techniques in the design process. The advantage of doing this would be the ability to design more efficient structures with some measure of certainty of the reliability level involved. The particular application in ship structural design which would benefit the most from using reliability methods is the design against fatigue failure. In this paper, some of the reliability-based methods currently being used (or proposed for use) in the design of structures against fatigue are examined. Each is evaluated as to its suitability for use in the structural design of ships. In addition, the authors propose a new reliability-based fatigue design format which is based on their recently introduced Reliability-Conditioned (RC) design method and the Load and Resistance Factor Design (LRFD) code format. This approach is hoped to provide the design engineer with an easy to understand and use tool based on the LRFD format. The RC method will enable him to quickly and accurately design the components of a ship's structure such that a desired level of safety against fatigue is achieved. Each of the methods discussed is used to solve a practical example. The results of that example and several others are used to discuss the relative merits of each method.

关键词： SHIPS

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U. S. NAVAL ACADEMY'S NEW YARD PATROL CRAFT: FROM CONCEPT TO DELIVERY.

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Naval Engineers Journal 1987年第1期99卷 37-58页

作者： Compton, Roger H. Chatterton, Howard A. Hatchell, Gordon McGrath, Frank K. Roger H:. Compton is a Webb graduate who since 1966 has been a part of the naval architecture faculty at the U.S. Naval Academy. Since accepting the appointment to the Academy he has been instrumental in establishing the ABET accredited major program in naval architecture in the conceptual design and operation of the Naval Academy Hydromechanics Laboratory and in the conceptual design of the 108-ft yard patrol craft. Besides his Naval Academy involvement he serves as an adjunct professor with Virginia Polytechnic Institute in its NAVSEA Institute graduate program at Crystal City. He is an active member of both ASNE and SNAME and has published technical papers with both societies. Howard A. Chatterton:began his career as a Navy coop student at the Boston Naval Shipyard in 1960. He received his bachelor's degree in naval architecture and marine engineering from Massachusetts Institute of Technology in 1966 and his master's degree in 1968. He was employed by the Preliminary Design Division of BuShips in the submarine design and hydrofoil design groups until 1972 when he joined the Coast Guard's Naval Engineering Division. He remained with the Design Branch until 1981 when he accepted a faculty position at the U.S. Naval Academy as the research director for the Academy's hydromechanics laboratory. He has recently returned to Coast Guard Headquarters as the assistant chief Naval Architecture Branch Office of Merchant Marine Safety. Gordon Hatchell:is a naval architect at the Naval Sea Combat Systems Engineering Station Norfolk Virginia in the Combatant Craft Engineering Department. He served as lead-ship YP project engineer from its inception to delivery and continues to serve as project coordinator on follow-up ship procurements. He has worked on other boat procurements as well as serving as weight and stability coordinator. Mr. Hatchell began his engineering career in the Design Division at the Norfolk Naval Shipyard in Portsmouth Virginia after receiving a BS in civil engineering from Virginia Polytec

The design of the new 108-ft yard patrol craft (YPs) for the U. S. Naval Academy is described from its beginnings as a senior midshipman design project, through its preliminary and contract design development at the U. S. Navy's small craft design team headquarters, Naval Sea Combat Systems engineering Station, Norfolk, Virginia (NAVSEACOMBAT-SYSENGSTA-Norfolk). During preliminary and contract design the Naval Academy Hydromechanics Laboratory (NAHL) provided experimental data to support NAVSEA-COMBATSYSENGSTA-Norfolk's design analyses in powering, seakeeping, and maneuvering. Several tradeoff studies of interest to patrol craft designers are presented. Major events in the detail design and construction of the first boat are described from both the designer's and the shipbuilder's points of view. The launching, builder's and sea trials of the first boat are described.

关键词： NAVAL VESSELS

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DEVELOPMENT OF A COMBINED ULTRAFILTRATION AND CARBON ADSORPTION SYSTEM FOR INDUSTRIAL WASTE-WATER REUSE AND PRIORITY POLLUTANT REMOVAL

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ENVIRONMENTAL PROGRESS 1986年第3期5卷 167-170页

作者： VANGILS, G PIRBAZARI, M Aratex Services Inc. 16001 Ventura Blvd. Encino CA Gerard J. Van Gils:is Director of Environmental and Mechanical Engineering at Aratex Services division of ARA Services in Encino California. He is currently working towards his doctorate at the Environmental Engineering Program Department of Civil Engineering University of Southern California. Massoud Pirbazari:is Assistant Professor at the Environmental Engineering Program Department of Civil Engineering University of Southern California in Los Angeles. His research has focused on the physical/chemical/biological processes for the removal of toxic materials from water and wastewater.

This article describes a work-in-progress. The development work described herein has culminated in the construction of a full-scale treatment system which is currently in operation and is being optimized in both its p... 详细信息

关键词： WASTEWATER

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EXAMPLES OF CORPORATE DISTRIBUTION AND TRANSPORTATION-PLANNING USING THE PRINCETON TRANSPORTATION NETWORK MODEL AND GRAPHIC INFORMATION-SYSTEM

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COMPUTERS ENVIRONMENT AND URBAN SYSTEMS 1984年第1期9卷 53-71页

作者： KORNHAUSER, AL Professor Civil Engineering Director Transportation Program Princeton University Princeton NJ 08540 U.S.A.

For the past 8 years researchers at Princeton have been developing an interactive high resolution computer graphic system which is specifically designed to address transportation network problems. The system utilizes a combination of state-of-the-art hardware and software. It has been made specific to rail, highway, waterway and urban transportation network problems of the U.S. and Canada. The analytical, stimulation, graphic and interactive techniques are applicable to transportation network problems of other geographic areas. The paper presents the hardware and algorithmic philosophies used to develop this most valuable network analysis and simulation environment. Described are data structure, computational procedures, hardware configuration and data sources. Included are examples of the wide range of network problems which are continuing to be addressed using this system. Included are issues of commodity transport (coal), railroad operations and car management, intemodal traffic and market analysis, analysis of mergers, and analysis of modal shares and modal flows.

关键词： TRANSPORTATION

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From our new president

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engineering Analysis 1984年第2期1卷 117-118页

作者： William G. Gray Associate Professor of Civil Engineering Dept. of Civil Engineering Water Resources Program Princeton University Princeton NJ 08544 USA

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