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Assessment of hydrological safety of Mae Sruai Dam, Thailand

Procedia engineering 2012年 32卷 1198-1204页

作者： T. Tingsanchali S. Tanmanee Program of Civil and Environmental Engineering Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand (Formerly Professor at Asian Institute of Technology Thailand) Maelao Operation and Maintenance Scheme Royal Irrigation Department Maelao District Chaingrai 57250 Thailand

Mae Sruai Dam was completed in 2003; it was built across Mae Sruai river in Chaing Rai province, Thailand. This study is done to assess the hydrological safety aspect of the dam for spillway adequacy of the dam to accommodate probable maximum flood inflow (PMF). The hydrological assessment was done by estimating the probable maximum precipitation (PMP) over Mae Sruai River Basin. The two approaches of PMP estimates namely (1) statistical approach and (2) storm maximization and transposition approach were adopted to calculate the 1-day, 2-day and 3-day PMPs. The 1-day PMP of the two approaches were compared with the regional 1-day PMP of Mekong River Basin estimated by U.S. Weather Bureau and U.S. Corps of Engineers in 1970. From the comparison, the storm maximization and transposition approach was finally selected and the 1-day, 2-day and 3-day PMPs were transformed to the continuous 4-day PMP by a regional approach. The HEC-HMS model was applied to transform PMP to PMF and to route the PMF through the reservoir to check if dam-crest had flow overtopping. The continuous 4-day PMP was transformed to PMF with peak reservoir inflow discharge of 1,013 m3/s and corresponding peak outflow of 886 m3/s. This outflow was less than the design spillway capacity of 1,160 m3/s. Thus, the dam safety in hydrological aspect was assured. Furthermore, flood routing study in the flood plain downstream of the dam indicated that flooding in Mae Sruai District floodplain especially in urbanized area would occur due to PMF inflow and hence flood control measures should be adopted.

关键词： Dam safety Mae Sruai Dam Hydrological safety assessment Probable maximum precipitation Probable maximum flood

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Fog forecasting, detection and monitoring in the UAE using SEVIRI-MSG data

Fog forecasting, detection and monitoring in the UAE using S...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Abdulla Bushahab Ali Al Suwaidi Hosni Ghedira Khaled Mubarak Associate Research Engineer DubaiSat-1 Program Emirates Institution for Advanced Science & Technology (EIAST) Dubai UAE Associate Professor of Civil Engineering American University in Dubai Dubai UAE Assistant Professor of Communication Engineering Sharjah UAE

The UAE location on the edge of a very warm sea and hot and dry desert create the optimal conditions of inland fog forming. The afternoon sea breeze, which is almost a daily event in UAE coastal areas, transports moisture inland, then at clear sky conditions at night, the large surrounding desert radiates heat very efficiently and temperatures fall quickly. The rapid cooling of accumulated inland moisture during the night represents the optimal conditions for fog development. Fog detection and monitoring algorithms from remote sensing data have been developed during the last two decades. Retrieval of fog-related information from geostationary platforms has matured into applications at operational level in many national weather service programs in the USA, Europe and more recently in China. In this study, a satellite-based tool developed at EIAST for fog detection and monitoring in the UAE will be presented. Data collected by SEVIRI instrument onboard of the European Satellite Meteosat Second Generation (MSG) were the main source of spatial data. The development approaches and the preliminary results will be presented and discussed in this paper.

关键词： Moisture Remote monitoring Sea measurements Ocean temperature Temperature sensors Cooling Information retrieval Europe Instruments Satellites

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The Seismic Reliability of Offshore Structures Based on Nonlinear Time History Analyses

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AIP Conference Proceedings 2008年第1期1020卷 963-970页

作者： Mahmood Hosseini Somayyeh Karimiyani Amin Ghafooripour Mohammad Javad Jabbarzadeh aAssociate Professor Civil Engineering Department Graduate School Tehran South Branch of the Islamic Azad University (IAU) Jamalzadeh St. Keshsavarz Blvd Tehran 14187 Iran bGraduate Student Civil Engineering Department Graduate School Tehran South Branch of the Islamic Azad University (IAU) Jamalzadeh St. Keshsavarz Blvd Tehran 14187 Iran cAssistant Professor Civil Engineering Department Tehran Central Branch of the Islamic Azad University (IAU) Tehran Iran dPhD Student Graduate Program International Institute of Earthquake Engineering and Seismology (IIEES) P.O. Box 19395/3913 Tehran Iran

Regarding the past earthquakes damages to offshore structures, as vital structures in the oil and gas industries, it is important that their seismic design is performed by very high reliability. Accepting the Nonlinear Time History Analyses (NLTHA) as the most reliable seismic analysis method, in this paper an offshore platform of jacket type with the height of 304 feet, having a deck of 96 feet by 94 feet, and weighing 290 million pounds has been studied. At first, some Push‐Over Analyses (POA) have been preformed to recognize the more critical members of the jacket, based on the range of their plastic deformations. Then NLTHA have been performed by using the 3‐components accelerograms of 100 earthquakes, covering a wide range of frequency content, and normalized to three Peak Ground Acceleration (PGA) levels of 0.3 g, 0.65 g, and 1.0 g. By using the results of NLTHA the damage and rupture probabilities of critical member have been studied to assess the reliability of the jacket structure. Regarding that different structural members of the jacket have different effects on the stability of the platform, an “importance factor” has been considered for each critical member based on its location and orientation in the structure, and then the reliability of the whole structure has been obtained by combining the reliability of the critical members, each having its specific importance factor.

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The EUROTECH Module: A Curricular Innovation for German Instruction

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Foreign Language Annals 2008年第3期30卷

作者： Herman J. De Vries Jr. Ph.D. Richard P Long Ph.D. University of Connecticut University of Cincinnati was Visiting Assistant Professor of German at the University of Connecticut in Storrs when this article was written. Currently he is Assistant Professor of Germanic Studies at Calvin College Grand Rapids MI. Rensselaer Polytechnic Institute is Professor of Civil and Environmental Engineering and CeDirector of the International Engineering Program EUROTECH at the University of Connecticut in Storrs.

ABSTRACT This paper presents the module course as an effective curricular innovation within the framework of a dual-degree program in German and engineering. Three modules, or one-credit courses, are offered in a series within the curriculum of EUROTECH: An International program in engineering at the University of Connecticut. By virtue of the structure of these modules, which feature multiple lectures by outside experts in fields of engineering and science, the module functions as a unique vehicle for content-based education. As such, the module is a creative response to the curricular demands of a dual-degree program. This paper discusses these curricular demands, examines the concept of a “module” course, presents the EUROTECH module series, and argues for its advantages. The authors see the module arrangement as an effective implementation that may well serve other dual-degree programs.

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Urban wet-weather flows

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Water Environment Research 2006年第10期78卷 1133-1192页

作者： Clark, Shirley E. Burian, Steven Pitt, Robert Field, Richard Department of Environmental Engineering School of Science Engineering and Technology Penn State Harrisburg 777 W. Harrisburg Pike TL-173 Middletown PA 17057 United States Department of Civil and Environmental Engineering University of Utah Department of Civil and Environmental Engineering University of Alabama Cudworth Professor of Urban Water Systems U.S. EPA Wet-Weather Flow Program Water Supply and Water Resources Division National Risk Management Research Laboratory - Cincinnati

This subject, Urban Wet-Weather Flows, is comprised of three basic subareas - combined-sewer overflows (CSOs), sanitary-sewer overflows (SSOs), and stormwater discharges. Major proceedings related to wet-weather flow (WWF) published during 2005 were the following: (1) WEFTEC 2005, 78th Annual Conference and Exposition (WEF, 2005);(2) Effective Modeling of Urban Stormwater Systems, Monograph 13 (CHI, 2005);and (3) 2005 Watershed Management Conference - Managing Watersheds for Human and Natural Impacts (EWRI, 2005). In addition to the conferences listed above, the 2005 Annual Conference of the American Water Resources Association, EWRI's World Environment and Water Resources Congress the 10thInternational Conference on Urban Drainage had significant sessions on wet-weather flows. In addition, many regional conferences also had significant sessions on wet-weather flow issues, such as the 2005 Pennsylvania Stormwater Management Symposium. For all of these, no indexed paper proceedings had been indexed at the time that this literature review was prepared. Copyright © 2006 Water Environment Federation.

关键词： Flow of water

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Balanced Scorecard-Based Performance Measurement for Rural Infrastructure Development of Thai Sub-District Local Government

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Asia-Pacific Journal of Rural Development 2005年第1期15卷 21 - 39页

作者： S. Posayanant C. Charoenngam Authors are Doctoral student and Associate Professor respectively of Construction Engineering and Infrastructure Management Program School of Civil Engineering Asian Institute of Technology Thailand. E-mail: ；

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FLOW PATTERNS AND DAMAGE OF DIKE OVERTOPPING

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International Journal of Sediment Research 2003年第4期18卷 301-309页

作者： Chaiyuth CHINNARASRI,Tawatchai TINGSANCHALI,Sutat WEESAKUL,Somchai WONGWISES Assistant Professor Water Resources Engineering Research Lab. (WAREE) Department of Civil Engineering King Mongkut's University of Technology Thonburi 91 Pracha-utit Rd. Bangkok 10140 Professor Water Engineering and Management Program Asian Institute of Technology P.O. Box 4 Klong Luang Pathumthani 12120 Assistant Professor Water Engineering and Management Program Asian Institute of Technology P.O. Box 4 Klong Luang Pathumthani 12120 Professor Department of Mechanical Engineering King Mongkut's University of Technology Thonburi 91 Pracha-utit Rd. Bangmod Bangkok 10140

Damage of a dike may result in severe damage and suffering. To reduce downstream damage and loss of life, it is important to study the process of breaching of the damaged dike. It is not possible to understand the damage process without a clear understanding of the flow patterns encountered. In the present study, data obtained from nine experimental runs are analyzed. The flow patterns and progressive damage of dike overtopping are investigated. Two types of phenomena at the dike surface: erosion; and erosion and sliding, are observed during the overtopping event. Four stages of dike damage can be distinguished. The degradation rate of the dike crest is found to be dependent on the downstream slope of the dike. The degradation rate is higher when the downstream slope is steeper.

关键词： Flow pattern Damage Dike Overtopping

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Risk assessment and management of offshore structures

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Progress in Structural engineering and Materials 2001年第2期3卷

作者： Robert G Bea Professor Department of Civil and Environmental Engineering Ocean Engineering Graduate Program 212 McLaughlin Hall University of California at Berkeley Berkeley CA 94720–1712 USA

During the past 30 years, reliability-based risk assessment and management processes have been developed and applied in assessing and maintaining the integrity of a worldwide infrastructure of offshore structure systems. These systems are characterized as a combination of structures, hardware/equipment, operating personnel, organizations, environments and the interfaces between these components. Background on current and future trends in development of comprehensive programs to help improve the quality and reliability of offshore structure systems are outlined. The importance and characteristics of human and organizational factors are discussed. A combination of proactive, reactive and interactive approaches have been developed that employ three strategies to achieve desirable quality and reliability: reduce likelihood of malfunctions, increase detection and correction of malfunctions, and decrease the effects and consequences of malfunctions. System robustness and fail-safe design are key elements of the third strategy.

关键词： offshore structures risk assessment risk management design codes design guidelines probabilistic risk analysis quantitative risk analysis qualitative risk analysis

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Probabilistic risk analysis of diesel power generators onboard ships

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NAVAL ENGINEERS JOURNAL 1999年第3期111卷 35-58页

作者： Ayyub, BM Karaszewski, ZJ Wade, M Bilal M. Ayyub.:is a Professor of Civil Enginnering and the Director of the Center for Technology and Systems Management at the University of Maryland (College Park). He is also a researcher and consultant in the areas of structural engineering inspection methods and practices reliability and risk analysis. He completed his B.S. degree in civil engineering in 1980 and completed both the M.S. (1981) and Ph.D. (1983) in civil engineering at the Georgia Institute of Technology. Dr. Ayyub has an extensive background in uncertainty modeling and marine structural reliability marine structures uncertainty modeling and anaylsis and mathematical medeling using the theories of probability statistics and fuzzy sets. He has completed several research projects that were funded by the NSF USCG USN the USACE ASME and several engineering companies. Dr. Ayyub served the engineering community in various capacities through societies that include ASNE ASCE ASME SNAME IEEECS and NAFIPS. He is the authour and co-author of about 250 publications in journals and conference proceedings and reports. His publications include edited books textbooks and book chapters. Dr. Ayyub is the only double recipient of the ASNE “Jimmie” Hamilton Award for the best papers in the Naval Engineers Journal in 1985 and 1992. Also he received the ASCE “Outstanding Research Oriented Paper” in the Journal of Walter L. Huber Research Prize in 1997 and the K.S. Fu Award of NAFIPS in 1995. He is a registered Professional Engineer (PE) with the State of Maryland. Zbigniew J. Karaszewski:is the Associate Director of the University of Maryland's Center for Technology and Systems Management and technical director of the Center for Maritime Leadership. He is a Systems Engineering and Management Consultant specializing in life cycle system support business systems auditing and risk management and loss prevention. Mr. Karasezewski has 30 years of experience in the field of systems performance analysis and management as a practitioner and teacher

In this paper, a methodology and guidelines for applying risk methods in design and operation of maritime systems were developed and demonstrated using a case study of marine diesel generators. The methodology consists of several modules that include system definition based on functional and performance requirements, definition of dependencies among subsystems, data collection and reduction, reliability and risk analyses, and results reduction for use in decision analysis. The methodology was used to assess and analyze typical service diesel generators found onboard ships. The analysis included the generation of cut sets for the overall reliability of the system. The most likely failure scenarios were determined by demonstration as the failure of fuel supply components. The results are consistent with previous findings of the U.S. Coast Guard.

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Petroleum hydrocarbon bioventing kinetics determined in soil core, microcosm and tubing cluster studies

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GROUND WATER MONITORING AND REMEDIATION 1996年第1期16卷 141-153页

作者： Moyer, EE Ostendorf, DW Richards, RJ Goodwin, S Ellen E. Moyer (ENSR Consulting and Engineering 35 Nagog Park Acton MA 01720) is a senior environmental engineer at ENSR Consulting and Engineering in Acton Massachusetts. Her research interests include bioremediation air sparging soil venting and analytical modeling of subsurface contamination. Dr. Moyer is a registered professional engineer with an M.S. in environmental engineering and a Ph.D. in civil engineering from the University of Massachusetts at Amherst and is a member of the National Ground Water Association (NGWA) and the American Society of Civil Engineers. David W. Ostendorf (Civil Engineering Department University of Massachusetts Amherst MA 01003) is an associate professor in the Environmental Engineering Program of the Civil Engineering Department of the University of Massachusetts at Amherst. His research interests include unconfined aquifer contamination hazardous waste site remediation and analytical modeling of problems in environmental fluid mechanics. Dr. Ostendorf is a registered professional engineer and a member of the American Geophysical Union American Society of Civil Engineers Soil Science Society of America Water Pollution Control Federation Association of Environmental Engineering Professors and NGWA. Robin J. Richards (Department of Microbiology University of Massachusetts Amherst MA 01003) is a doctoral student in microbiology at the University of Massachusetts at Amherst. Her research interests include synthesis and biodegradation of microbially produced polymers as well as bioremediation of petroleum contamination in soil and ground water. She has a B.S. in civil engineering from City College of New York and an M.S. in environmental engineering from the University of Massachusetts at Amherst. Steve Goodwin (Microbiology Department University of Massachusetts Amherst MA 01003) is an associate professor in the Department of Microbiology of the University of Massachusetts at Amherst. His research interests include microbial ecology anaerobic digestion and

Aerobic biodegradation of vapor-phase petroleum hydrocarbons was evaluated in an intact soil core from the site of an aviation gasoline release. An unsaturated zone soil core was subjected to a flow of nitrogen gas, oxygen, water vapor and vapor-phase hydrocarbons in a configuration analogous to a biofilter or an in situ bioventing or sparging situation. The vertical profiles of vapor-phase hydrocarbon concentration in the soil core were determined by gas chromatography of vapor samples. Biodegradation reduced low influent hydrocarbon concentrations by 45 to 92 percent over a 0.6-m interval of an intact soil core. The estimated total hydrocarbon concentration was reduced by 75 percent from 26 to 7 parts per million. Steady-state concentrations were input to a simple analytical model balancing advection and first-order biodegradation of hydrocarbons. First-order rate constants for the major hydrocarbon compounds were used to calibrate the model to the concentration profiles. Rate constants for the seven individual hydrocarbon compounds varied by a factor of 4. Compounds with lower molecular weights, fewer methyl groups, and no quaternary carbons tended to have higher rate constants. the fist-order rate constants were consistent with kinetic parameters determined from both microcosm and tubing cluster studies at the field site.

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