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Geotechnical Frontiers 2025: Geotechnics of Natural Hazards

作者： Ji, Xiaohang Xiao, Ming Martin, Eileen Dept. of Civil and Environmental Engineering Pennsylvania State Univ. University ParkPA United States Dept. of Geophysics Dept. of Applied Math and Statistics Hydrologic Science and Engineering Program Colorado School of Mines GoldenCO United States

ISBN: (数字)9780784485996

Increasing air temperatures are driving permafrost warming across the Arctic and sub-Arctic. This in turn degrades the geomechanical properties of soils, disrupts the natural environment and infrastructure systems, and results in long-lasting societal impacts. Understanding the thermal state of degrading permafrost in the Arctic is crucial for maintaining resilient infrastructure in the changing Arctic. This study employs Distributed Temperature Sensing (DTS) to monitor permafrost temperature near Utqiaġvik, Alaska, from 2021 to 2024. Fiber-optic DTS sensors have unique and attractive characteristics that allow their deployment in the Arctic for low-maintenance, cost-effective, and high-resolution data. This paper presents the temperature recordings of a 2-km DTS system on the tundra near Utqiaġvik, Alaska, by the Elson Lagoon. A hysteresis model is developed to link permafrost temperature with air temperature, incorporating meteorological data and ground surface conditions. The study also explores the impact of civil infrastructure on permafrost thermal dynamics. © ASCE.

关键词： Permafrost

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EXPERIMENTAL AND NUMERICAL DYNAMIC EVALUATION OF PROFILED STEEL DECKING SLAB IN A CONTAINER HOUSE USING MEMS 9

EXPERIMENTAL AND NUMERICAL DYNAMIC EVALUATION OF PROFILED ST...

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9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake engineering, COMPDYN 2023

作者： Lima, Henrique Tavares de Medeiros Alas, Luis Ernesto de Almeida Nunes, Mateus Narcizo da Silva Medeiros, Iálysson de Lima, Douglas Mateus Graduate Program of Civil and Environmental Engineering Academic Center of Agreste Federal University of Pernambuco Avenida Marielle Franco Bairro Nova Caruaru PE Caruaru55014-900 Brazil

The reuse of shipping containers is common in civil construction, not only for ecological reasons but also for speeding up the construction time, thus favoring the decrease in the payback time of the applied financial investment. Consequently, technological developments guarantee this trend with lighter structural elements, thus occurring natural frequencies closer to the frequency ranges of dynamic excitations associated with human activities. Therefore, a direct consequence of this new design trend is a considerable increase in problems related to unwanted vibrations in steel and concrete composite slabs, which arise from rhythmic actions, and external vibrations arising from earthquakes, which must be analysed to meet the comfort and safety of residents. Thus, this study aims to present a vibration analysis in a composite floor slab, built in steel deck 59S, of a residence built with reuse maritime containers in the municipality of Gravatá in Pernambuco, Brazil. The structure consists of three floors, with the cantilever slab analysed with dimensions of 8.24 m wide and 4.00 m long. In the experimental phase, vibration analysis was carried out through the heel impact test to obtain the natural frequencies, which had average values of 7.0 Hz, and average values of 7.14% for the damping ratio of the slab, a MicroElectroMechanical System (MEMS) was used, which are accelerometers of signals present in smartphone devices. Subsequently, using the software SCIA Engineer, the numerical analysis of the model was carried out, where usual discretization techniques were used through the Finite Element Method (FEM) to evaluate the structural behavior against dynamic actions, thus obtaining the results of natural frequencies, average values of 6.46 Hz, and modal shapes. With this, it was possible to verify the results regarding the natural frequencies of vibration, analysing the usability, comfort, and health of the structure according to the current normative codes. Finally, t

关键词： Natural frequencies

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Heavy metals in agricultural soil in China: A systematic review and meta-analysis

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Eco-Environment & Health 2022年第4期1卷 219-228页

作者： Moyan Wen Ziqi Ma Daniel BGingerich Xiao Zhao Dongye Zhao College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China Department of Civil Environmental and Geodetic EngineeringThe Ohio State UniversityColumbusOH 43210USA Department of Integrated Systems Engineering The Ohio State UniversityColumbusOH 43210USA Environmental Engineering Program Department of Civil EngineeringAuburn UniversityAuburnAL 36849USA

Research about farmland pollution by heavy metals/metalloids in China has drawn growing ***,there was rare information on spatiotemporal evolution and pollution levels of heavy metals in the major grainproducing *** extracted and examined data from 276 publications between 2010 and 2021 covering five major grain-producing regions in China from 2010 to *** evolution characteristics of main heavy metals/metalloids was obtained by *** addition,subgroup analyses were carried out to study preliminary correlations related to accumulation of the ***(Cd)was found to be the most prevailing pollutant in the regions in terms of both spatial distribution and temporal *** Huang-Huai-Hai Plain was the most severely *** of Cd,mercury(Hg)and copper(Cu)increased from 2010 to 2015 when compared with the 1990 background ***,the levels of five key heavy metals(Cd,Cu,Hg,lead[Pb]and zinc[Zn])showed increasing trends from 2016 to 2021 in all five *** pH and mean annual precipitation had variable influences on heavy metal *** soil and areas with less rainfall faced higher pollution *** cropped with mixed species showed smaller effect sizes of heavy metals than those with single upland crop,suggesting that mixed farmland use patterns could alleviate the levels of heavy metals in *** various soil remediation efforts,farmland projects only held a small market *** findings are important to support the research of risk assessment,regulatory development,pollution prevention,fund allocation and remediation actions.

关键词： Heavy metal Agricultural soil Soil pollution Meta-analysis Spatiotemporal evolution

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Assessment of climate change impact on high flows in a watershed characterized by flood regulating reservoirs

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International Journal of Agricultural and Biological engineering 2021年第1期14卷 178-191页

作者： Sabin Shrestha Suresh Sharma Civil and Environmental Consultants Inc.BridgeportWV 26554USA Civil/Environmental Engineering Program Youngstown State UniversityOne University PlazaYoungstownOH 44555USA

A climate-induced extreme flow event such as flooding is one of the most devastating natural hazards,which can significantly damage human lives and *** study examined the effects of climate change on the high flow conditions in the Great Miami River Watershed in Ohio under two emission scenarios(RCP 4.5 and RCP 8.5).Streamflow for the 21st century was simulated by utilizing a watershed model-SWAT(Soil and Water Assessment Tool)and 10 different climate outputs from the Coupled Model Intercomparison Project phase 5(CMIP5).The future streamflow was divided into three equal periods:2016-2043(early century),2044-2071(mid-century),and 2072-2099(late century)and independently analyzed to compare high flows of respective intervals with baseline periods(1988-2015).The analysis predicted that 7-day,10-year high-flow(7Q10)would increase by 38%under RCP 4.5 and 44%under RCP ***,the annual peak flows for study periods were predicted to increase by 26%under RCP 4.5 and 38%under RCP 8.5 from the base ***,the analysis demonstrated an erratic response for monthly peaks indicating that the peak flow would increase in summer months-May and July to ***,the result did not show any significant increase during the winter season,especially from November to *** analysis of the four major dams located in the watershed showed that the dam’s peak discharges increase in January,May,and *** though increasing peaks were projected in September for the 21st century,the monthly peaks from the watershed outlet were found to be lowest in September as compared to other *** frequency of future flooding compared to the historical record was found to be increasing in the mid-century under RCP 4.5 and the late century under RCP *** the future flood is projected to increase,this study finds the reasonable impact of climate change on flood regulating reservoirs/dams in monthly ***,daily high flows(90th percentile flow)would b

关键词： climate change high flows SWAT Great Miami River Watershed flood regulating reservoir assessment

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Biodegradation of Diethyl Phthalate (Dep) Using Fungi Isolated from Leachate of Sarimukti Landfill, Bandung

SSRN

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SSRN 2024年

作者： Sembiring, dan Emenda Keiva Mulyana, Suci Study Program of Environmental Engineering Faculty of Civil and Environmental Engineering Bandung Institute of Technology Ganesha Street Number 10 Bandung 40132 India

Phthalate as plasticizer is commonly used in plastics industries. Phthalate compounds that are commonly found in everyday life are diethyl phthalate (DEP). This compound is dangerous because it is carcinogenic, xenoestrogenic and has endocrine disrupting effects. The accumulation of plastic in landfill causes this compound to be identified in leachate range from ND- 33 mg/l. one of active landfill in Bandung shows concentration of DEP 1.277 mg/L- 2.4 mg/l. Biological treatment was investigated for DEP removal. The treatment involves the degradation of DEP using fungi isolated from leachate samples. Degradation tests were carried out at varying concentrations of 2 mg/l, 4 mg/l, 6 mg/l, 8 mg/l and 10 mg/l as a carbon source for fungi growth. Duration of analysis is 15 days or until fungi decay phase achieved. High Performance Liquid Chromatography analysis shows that DEP removal efficiency reached 98-99% in each concentration variation on day 9 with a specific fungal growth rate of 0.0531-0.111/day © 2024, The Authors. All rights reserved.

关键词： High performance liquid chromatography

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Correction to: Contaminants of emerging concerns (CECs) in a municipal wastewater treatment plant in Indonesia

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environmental science and pollution research international 2023年第8期30卷 21533-21534页

作者： Maryani Paramita Astuti Suprihanto Notodarmojo Cindy Rianti Priadi Lokesh P Padhye Department of Civil and Environmental Engineering The University of Auckland Auckland New Zealand. Environmental Engineering Study Program Faculty of Engineering President University Cikarang Indonesia. Environmental Engineering Department Faculty of Civil and Environmental Engineering Bandung Institute of Technology (ITB) Bandung Indonesia. Environmental Engineering Study Program Civil Engineering Department Engineering Faculty University of Indonesia (UI) Depok Indonesia. Department of Civil and Environmental Engineering The University of Auckland Auckland New Zealand. l.padhye@auckland.ac.nz.

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Implementation of Dama Mandala Application in Realizing Smart City Vision in Denpasar City

Implementation of Dama Mandala Application in Realizing Smar...

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International Conference on Smart Computing & Communications (ICSCC)

作者： Dewa Ayu Trisna Adhiswari Wedagama Decky Cipta Indrashwara I Gusti Agung Ananda Putra Environmental Engineering Study Program Universitas Pendidikan Nasional Denpasar Indonesia Civil Engineering Study Program Universitas Pendidikan Nasional Denpasar Indonesia

ISBN: (数字)9798350363104

ISBN: (纸本)9798350363111

The incorporation of information and communication technology (ICT) to improve infrastructure and establish a efficient and responsive environment is a key element of Denpasar Citys ambition to evolve into a Smart City. This research delves into the utilization of E Government, via the Dama Mandala app underscoring its significance in this transition. Through surveys and interviews employing a methodology the study demonstrates that the Dama Mandala app has greatly enriched the lives of Denpasar Citys inhabitants by granting them access to government services and information online. These results imply that the app plays a role, in realizing Denpasar Citys aspiration of becoming a culture oriented Smart City advancing towards the vision of Denpasar Maju.

关键词： Surveys Knowledge engineering Technological innovation Irrigation Smart cities Navigation Roads Government Information and communication technology Stakeholders

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Comparative Analysis of Uncertainty Characterization Methods in Urban Building Energy Models in Hot-Arid Regions 18

Comparative Analysis of Uncertainty Characterization Methods...

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18th IBPSA Conference on Building Simulation, BS 2023

作者： Zhan, Dongxue Sezer, Nurettin Hassan, Ibrahim Galal Wang, Liangzhu Centre for Zero Energy Building Studies Department of Building Civil and Environmental Engineering Concordia University MontrealQC Canada Mechanical Engineering Program Texas A&M University at Qatar Engineering Building Education City Doha Qatar

The development of reliable building energy models at the urban scale is crucial for analyzing and optimizing the energy efficiency of cities. The bottom-up physics-based approach has been widely employed in Urban Building Energy Models (UBEMs). However, the uncertainty of input parameters can impact the reliability of UBEM simulation outputs, and very limited studies considered the uncertainty when developing archetype models for UBEMs. While UBEMs typically rely on a traditional deterministic approach, incorporating probabilistic methods can significantly enhance simulation accuracy by accounting for uncertain variables. Probabilistic methods involve characterizing key uncertainties in input data using Probability Distribution Functions (PDFs). Yet, the effect of using different PDF types on UBEM results is not adequately understood, and the literature often assumes uniform distribution. In this study, UBEM is characterized based on three methods. The deterministic approach is used to serve as a baseline, and two different PDF types are used to examine how PDFs impact simulation results when uncertain parameters are present in UBEMs. Latin Hypercube Sampling (LHS) is employed to propagate uncertainty in input parameters in UBEM. The study is conducted on a case study area of the Marina district of Lusail City, Qatar, characterized by a hot and arid climate. © 2023 *** rights reserved.

关键词： Energy efficiency

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Assessing and Tracking Progress Towards Circular Economy for Decision-Making 115

Assessing and Tracking Progress Towards Circular Economy for...

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115th Air and Waste Management Association Annual Conference and Exhibition, ACE 2022

作者： Tarroja, Brian Department of Civil & Environmental Engineering Energy Systems Integration Advanced Power and Energy Program University of California Irvine United States

ISBN: (纸本)9781713866602

• We need to develop a framework for tracking progress towards alignment with a circular economy for the life cycles of solar PV and lithium-ion batteries - as well as other products. • This framework needs to be explicitly grounded in circular economy strategies, but also produce information that is relevant for decision makers involved in battery or solar PV life cycles. • To achieve this, challenges regarding data and assessment needs, as well as barriers for translation to decision-relevant information, need to be overcome. © Advanced Power and Energy program 2022.

关键词： Life cycle

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Making Moves Move: Fast Emissions Estimates for Repeated Transportation Policy Scenario Analyses

SSRN

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SSRN 2024年

作者： Fraser, Timothy Guo, Yan Gao, H. Oliver College of Social Sciences and Humanities Systems Engineering Program Cornell University United States School of Civil and Environmental Engineering

Efforts to reduce US emissions from transportation rely greatly on the environmental Protection Agency’s MOVES software to estimate pollutant emissions, a high-precision, computationally intensive tool with many required inputs. To compare numerous scenarios at scale, decision-makers need a faster, user-friendly, and credible emissions estimator. This study introduces MOVESLite, a framework for making fast, highly accurate predictions (with respect to MOVES) of emissions tailored to a user's county, with a limited, more user-friendly number of inputs. MOVESLite uses county- and pollutant-specific models trained on previous MOVES estimates to estimate transportation emissions immediately. While MOVES may take minutes-to-hours to estimate one county-year’s emissions, MOVESLite takes approximately 1 millisecond, with acceptable accuracy. We validate MOVESLite, comparing thousands of possible models’ accuracy for random samples of US counties, and we implement a case study of public transportation planning in Tompkins County, NY. MOVESLite aims to help decision-makers compare and select effective climate action policies. © 2024, The Authors. All rights reserved.

关键词： environmental Protection Agency

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