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Using an Inventory of Unstable Slopes to Prioritize Probabilistic Rockfall Modeling and Acid-Base Accounting in Great Smoky Mountains National Park 在大烟山国家公园使用不稳定斜坡清单优先考虑概率岩崩模型和酸碱核算
4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2023-03-28 DOI: 10.2113/eeg-d-22-00063
Thomas O'Shea, Samantha Farmer, Arpita Nandi, Eric Bilderback, Ingrid Luffman, Andrew Joyner
Abstract An important first step in the geotechnical asset management of Great Smoky Mountains National Park (GRSM) is the creation of an unstable slope inventory along major transportation corridors. Slope-stability problems are frequent in GRSM, often initiated in highly weathered and fractured metasedimentary rocks. In this study, an unstable slope inventory was created using the Unstable Slope Management Program for Federal Land Management Agencies protocols. Hazards and risks were evaluated for 285 unstable slopes along 243.67 km of roadway. Kernel density estimation was used to identify unstable slope hotspots and establish 14 sites for site-specific investigations to evaluate potential impacts of discrete unstable slopes along major roadways. Two-dimensional probabilistic rockfall simulations and acid-base accounting tests were used to predict rockfall pathways and evaluate the acid-producing potential of rocks. Simulations indicated that rock material would likely enter the roadway at all 14 sites. Acid-base accounting test results indicated that slaty rocks of the Anakeesta Formation and graphitic schist of the Wehutty Formation are primary acid-producing rocks in rockfall-prone areas. This research illustrates an approach for prioritizing areas for site-specific investigations towards the goal of improving safety in GRSM, including developing mitigation strategies for rockfall by widening ditches, installing barriers, and encapsulating acidic rockfall material.
摘要:在大烟山国家公园(GRSM)的岩土资产管理中,重要的第一步是创建沿主要交通走廊的不稳定边坡清单。斜坡稳定性问题在GRSM中很常见,通常起源于高度风化和断裂的变质沉积岩。在本研究中,使用联邦土地管理机构协议的不稳定边坡管理程序创建了不稳定边坡清单。对243.67 km道路上285个不稳定边坡进行了危害和风险评价。采用核密度估计方法识别失稳边坡热点区,建立14个定点调查点,对主要道路沿线离散失稳边坡的潜在影响进行评价。采用二维概率岩崩模拟和酸碱核算试验预测岩崩路径,评价岩石的产酸潜力。模拟表明,岩石材料可能会在所有14个地点进入巷道。酸碱衡算试验结果表明,在岩落易发区,Anakeesta组板岩和Wehutty组石墨片岩是主要的产酸岩。这项研究阐明了一种方法,可以优先考虑针对特定地点的调查区域,以实现提高GRSM安全性的目标,包括通过拓宽沟渠、安装屏障和封装酸性落石材料来制定缓解落石的策略。
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引用次数: 0
Environmental impactassessment case study of the construction of a main gaspipeline, section Sveti Nikole-veles Sveti Nikole-veles段主要天然气管道建设的环境影响评价案例研究
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.7
Elena Nikolovska, Vesna Milanovikj, Ivica Andov, Bojana Veljanoska, Daliborka Todorovska-Janevska, Ružica Cacanoska, Martina Blinkova Donchevska, Suzana Kasovska Georgieva, Tanja Dimitrova Filkoska
The Republic of North Macedonia undertakes intensive activities aimed at replacing fuels - fossil fuels with renewable energy sources and natural gas, to monitor the modern trends of exit from the energy crisis and environmental protection. Under the efforts of the National Gasification System in the country, i.e. the development of the existing gas infrastructure, the project for construction of the gas pipeline section Sveti Nikole – Veles was developed. The route of the gas pipeline starts east of the city of Sveti Nikole and ends south of the city of Veles with characteristics: DN 200, Ø 8” and length of 27.67 km. The Environmental Impact Assessment process is intended to serve as a primary input for the decision-making process by Macedonian authorities and the IFI in charge (EBRD in this case), which have to approve the Project before its implementation. The decision-making process includes the preparation of all documentation in accordance with the EBRD’s Performance Requirement (PR), The National Legislation, and Good International Practice (GIP). This EIA study identifies the potential negative impacts on the media in the environment from the relevant stages of the project i.e. pre-construction, construction, operations, and decommissioning and reinstatement, and proposes measures for their reduction or mitigation, i.e. improvement of the environment in the Environmental and Social Management Plan.
北马其顿共和国开展了大量活动,旨在用可再生能源和天然气替代燃料- -化石燃料,以监测摆脱能源危机和保护环境的现代趋势。在该国国家气化系统的努力下,即发展现有的天然气基础设施,开发了Sveti Nikole - Veles天然气管道段的建设项目。天然气管道的路线从Sveti Nikole市以东开始,在Veles市以南结束,特征:dn200, Ø 8”,长度为27.67公里。环境影响评估程序旨在作为马其顿当局和国际金融机构(在本例中为欧洲复兴开发银行)决策过程的主要投入,该机构必须在项目实施前批准该项目。决策过程包括根据欧洲复兴开发银行的绩效要求(PR)、国家立法和良好国际惯例(GIP)准备所有文件。这项环评研究查明工程项目在有关阶段(即建造前、建造、运作、停用及修复工程)对环境中的媒介可能造成的负面影响,并在《环境及社会管理计划》内提出减少或缓解这些影响的措施,即改善环境。
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引用次数: 0
The impact of climate policyand climate change on pm2.5 emission from residential wood combustion 气候政策和气候变化对住宅木材燃烧pm2.5排放的影响
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.6
M. Poljanac, Elvira Horvatić Viduka
Residential wood combustion is the dominant source of particulate matter PM2.5 in the Republic of Croatia. Although the wood biomass is considered a green, sustainable energy source, at the same time the inhalation of PM2.5 particles from residential wood combustion, is associated with harmful effects on human health. The paper analyzes the variability of PM2.5 emission regarding three factors, which are closely related to climate policy and climate change. The first factor is related to the introduction of new, more environmentally friendly wood biomass combustion technologies. The second factor relates to the consumption of wood biomass depending on climate variability. The third factor refers to the implementation of measures for energy renovation of family houses. The aim of this paper is to distinguish the contribution of individual factors, both on the historical PM2.5 emissions from residential wood combustion, and on the emission projections up to the year 2050.
住宅木材燃烧是克罗地亚共和国PM2.5颗粒物的主要来源。虽然木材生物质被认为是一种绿色、可持续的能源,但与此同时,住宅木材燃烧吸入PM2.5颗粒,对人体健康产生有害影响。本文从与气候政策和气候变化密切相关的三个因素分析PM2.5排放的变异性。第一个因素与采用新的、更环保的木材生物质燃烧技术有关。第二个因素与取决于气候变化的木材生物量消耗有关。第三个因素是家庭房屋能源改造措施的实施情况。本文的目的是区分各个因素的贡献,包括住宅木材燃烧产生的PM2.5历史排放,以及到2050年的排放预测。
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引用次数: 0
Stability analysis of an oldearth Samarkand Dam in Kazakhstan under rapid drawdown conditions 哈萨克斯坦古老撒马尔罕大坝快速落水条件下的稳定性分析
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.2
A. Zhussupbekov, T. Mkilima
Despite being potential historical sites, old embankment dams are subjected to many stability challenges due to many factors, including a lack of sufficient stability assessment tools by the time the dam was built and changes in embankment material properties induced by natural and human activities. Therefore, with the current advancement in technology is of great importance to investigate the state of old embankment dams under different potential loading conditions. The stability challenges become of more significant concern when the embankment is subjected to a rapid drawdown loading scenario. In this study, the Samarkand dam located in Karaganda province in Kazakhstan which was put into operation in 1941 is investigated in terms of seepage and slope stability with the help of numerical modelling. Both steady and transient (rapid drawdown) flow conditions are taken into consideration. e finite element method-based modelling is achieved using SEEP/W and SLOPE/W of the GeoStudio software. From the analysis results, it was observed that the old dam can be subjected to a potential failure under rapid drawdown conditions as the minimum factor of safety values were decreasing with the increase in the drawdown rates. For instance, the minimum factor of safety from the instantaneous drawdown rate was equivalent to 32.85% less than the factor of safety retrieved from the long-term steady-state conditions. Also, from Analysis of Variance (ANOVA), a p-value of 9.97× 10-29 was obtained after subjecting the factor of safety values from instantaneous, 5 days, 10 days, and 1 m per day drawdown rates to ANOVA, indicating that the factor of safety differences among the analyzed drawdown rates were statistically significant.
尽管是潜在的历史遗迹,但由于许多因素,包括大坝建成时缺乏足够的稳定性评估工具以及自然和人类活动引起的堤防材料特性的变化,旧堤防大坝受到许多稳定性挑战。因此,随着技术的进步,研究不同潜在荷载条件下老旧堤防坝体的状态具有重要意义。当路堤承受快速下拉荷载时,稳定性挑战变得更加重要。本文以1941年投入运行的哈萨克斯坦卡拉干达省撒马尔罕大坝为研究对象,采用数值模拟的方法对坝体渗流和边坡稳定性进行了研究。考虑了稳态和瞬态(快速下降)流动条件。利用GeoStudio软件的SEEP/W和SLOPE/W实现基于有限元法的建模。分析结果表明,随着落水速率的增大,最小安全系数逐渐减小,旧坝在快速落水条件下可能发生潜在破坏。例如,从瞬时降速获得的最小安全系数相当于从长期稳态条件获得的安全系数低32.85%。从方差分析(ANOVA)中,将瞬时、5天、10天、1 m / d的缩水率的安全系数进行方差分析,得到的p值为9.97× 10-29,表明所分析的缩水率之间的安全系数差异具有统计学意义。
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引用次数: 0
An example ofthe protection of a deep excavation in an urban environment 一个在城市环境中保护深基坑的例子
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.9
Filip Dodigović, Krešimir Agnezović, K. Ivandić, Stjepan Strelec
The paper presents the design of deep excavation support system in an urban environment. Excavation is carried out in the vicinity of surrounding buildings whose structural stability must be ensured during the execution of the construction works. The 60 cm thick diaphragm wall supported by the two rows (17.00 m and 18.25) of geotechnical anchors was selected as an excavation support system. The approximate floor plan dimensions of the diaphragm wall are 81x118 m, and the maximum excavation depth is 10.5 m. An additional challenge in designing the diaphragm wall is the presence of groundwater, whose maximum level is observed at a depth of approximately 5.8 m. In order to ensure the execution of construction works in dry conditions, a system of drainage trenches and wells is designed at the bottom of the pit. The diaphragm wall is designed in accordance with Eurocode 7.
本文介绍了城市环境下深基坑支护系统的设计。挖掘是在周围建筑物附近进行的,在施工过程中必须保证建筑物的结构稳定性。选取两排(17.00 m和18.25 m)岩土锚杆支撑的60 cm厚连续墙作为开挖支护体系。地下连续墙平面尺寸约为81x118 m,最大开挖深度10.5 m。设计连续墙的另一个挑战是地下水的存在,其最大水位约为5.8米深。为了确保在干燥条件下施工,在基坑底部设计了排水沟渠和水井系统。连续墙的设计符合欧洲规范7。
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引用次数: 0
Modern technologies andmethods of data collection in the function of making better traffic analysis offorensic traffic experts 现代数据采集技术和方法的功能使交通分析更有利于交通专家的取证
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.1
R. Kamnik, Darja Topolšek, Stanko Laković
Even though the European roads are among the safest in the world, the number of road accidents is still a cause for concern. To reduce their number and consequences, many studies are being conducted, including knowledge of the factors that influence the occurrence of accidents. Forensic traffic experts are also part of the treatment of traffic accidents, and they often must base their conclusions on proven incomplete studies of data collected by police officers. In some cases, traffic accident data are still collected in classical ways and with classical measuring equipment. This is often a source of error. This paper defines these errors and offers solutions that are shown primarily through data capture using 3D scanners and photogrammetry. In this way, we can perfectly recreate the situation in the event of a traffic accident through 3D models, thus eliminating many shortcomings of police drawings and records. The article also proposes a central database of traffic accidents as an additional solution to gain a deeper insight into the causes and consequences of traffic accidents.
尽管欧洲的道路是世界上最安全的道路之一,但交通事故的数量仍然令人担忧。为了减少事故的数量和后果,正在进行许多研究,包括了解影响事故发生的因素。法医交通专家也是处理交通事故的一部分,他们的结论往往必须基于对警察收集的数据进行的已证实不完整的研究。在某些情况下,交通事故数据仍然是用传统的方法和传统的测量设备收集的。这通常是错误的来源。本文定义了这些错误,并提供了主要通过使用3D扫描仪和摄影测量的数据捕获来显示的解决方案。这样,我们就可以通过3D模型完美地再现交通事故发生时的情景,从而消除了警察绘图和记录的许多缺点。文章还提出了一个交通事故的中央数据库作为一个额外的解决方案,以获得更深入地了解交通事故的原因和后果。
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引用次数: 0
A strategic evaluationframework to measure and guide efforts to protect biodiversity 一个衡量和指导生物多样性保护工作的战略评估框架
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.8
Paul Rouveyrol, M. Leroy, I. Witte
Through the Natura 2000 policy, EU member states are committed to maintaining or restoring the favourable conservation status of a list of habitats and species throughout their territory. We show here that evaluating the effectiveness of this policy regarding its assigned objectives requires translating these objectives into normative reference and then describing the constraints on habitats and species that the policy seeks to conserve. We propose a strategic evaluation framework based on this principle, applied at the level of the Metropolitan French territory, by relying on the exploitation of several data sets, whose are generally not mobilised by the standard evaluation procedure. The results are broken down by natural ecosystems and biogeographical regions, providing a dashboard for the policy that is the basis for a comprehensive strategic evaluation.
通过《自然2000》政策,欧盟成员国承诺在其领土内维持或恢复一系列栖息地和物种的有利保护地位。我们在这里表明,评估这一政策的有效性,需要将这些目标转化为规范性参考,然后描述该政策寻求保护的栖息地和物种的限制。我们提出了一个基于这一原则的战略评估框架,应用于法国大都会领土的层面,依靠对几个数据集的利用,这些数据集通常不会被标准评估程序动员起来。结果按自然生态系统和生物地理区域分列,为政策提供了一个仪表板,作为全面战略评估的基础。
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引用次数: 0
Impact of global warming onaverage annual air temperature in Varaždin 全球变暖对Varaždin年平均气温的影响
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.10
Marija Zorko, I. Kovač, Sanja Kovač, D. Stanko, K. Pandžić
Climate change implies a statistically significant change in the long-term mean state or characteristics of the variability of climate elements. It can be caused by natural and/or anthropogenic factors. Recent global warming is often cited as an example of human-induced climate change. Global warming refers to the increasing trend of the average global surface temperature of the Earth, defined as the global average of the mean annual surface temperature of the ocean, usually to a depth of 30-100 cm, and the mean annual surface temperature of the air above the land at a height of 1-2 m above the ground. In 1988, the World Meteorological Organization (WMO) and the United Nations Environment Program (UNEP) established the International Panel on Climate Change (IPCC), which assesses the state of the climate and the risk of climate change caused by human activities.To project climate change, it is necessary to determine the future emissions of greenhouse gases in the atmosphere. According to the IPCC, with appropriate scenarios of greenhouse gas emissions, an increase in the average global surface temperature of 1.5 °C to 4 °C is predicted by the end of the 21st century. The purpose of this paper is to show the relationship between the trend and variability of the global average of the mean annual surface temperature on Earth and the trend of the mean annual air surface temperature in Varaždin for the period 1949-2021. The results show significant correlations among them because Varaždin is located in an big area of surface air temperature anomalies which has a significant contribution to a global average anomalies in several last decades.
气候变化意味着气候要素变率的长期平均状态或特征在统计上的显著变化。它可以由自然和/或人为因素引起。最近的全球变暖经常被引用为人为引起的气候变化的一个例子。全球变暖是指地球的全球平均表面温度的上升趋势,定义为海洋的年平均表面温度的全球平均值,通常达到30-100厘米的深度,以及离地面1-2米高度的陆地上空空气的年平均表面温度。1988年,世界气象组织(WMO)和联合国环境规划署(UNEP)成立了国际气候变化专门委员会(IPCC),负责评估气候状况和人类活动引起的气候变化风险。为了预测气候变化,有必要确定未来大气中温室气体的排放量。根据政府间气候变化专门委员会,在适当的温室气体排放情景下,预计到21世纪末,全球平均地表温度将上升1.5°C至4°C。本文的目的是展示1949-2021年期间地球年平均表面温度的全球平均值与Varaždin年平均空气表面温度的趋势和变率之间的关系。由于Varaždin位于对近几十年全球平均异常有重要贡献的大面积地表气温异常区,结果表明它们之间具有显著的相关性。
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引用次数: 0
Climate change, disaster riskreduction and resilience 气候变化、减少灾害风险和复原力
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.5
D. Trut, J. Kovačević
Climate change increases the risks of instability in all its forms, and significantly affects the frequency and intensity of natural threats. In the last two decades, 90 percent of the world's major disasters were caused by events such as heat waves, floods, and weather-related droughts. The 2019 Disaster Risk Assessment for the Republic of Croatia for 10 out of 15 simple risks determined that climate change affected their occurrence. Climate change also affects complex risks, especially in urban areas. Therefore, when assessing the impact of climate change on the environment, it is necessary to consider the impact they have on disaster risks. Disaster risk reduction and climate change adaptation have a common area of interest, partly overlapping
气候变化增加了各种形式的不稳定风险,并对自然威胁的频率和强度产生重大影响。在过去的二十年里,世界上90%的重大灾害是由热浪、洪水和与天气有关的干旱等事件造成的。2019年克罗地亚共和国灾害风险评估对15个简单风险中的10个进行了评估,确定气候变化影响了它们的发生。气候变化还会影响复杂的风险,尤其是在城市地区。因此,在评估气候变化对环境的影响时,有必要考虑其对灾害风险的影响。减少灾害风险和适应气候变化具有共同的利益领域,部分重叠
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引用次数: 0
The technique forextrapolation of rock mass initial parameters during the construction of thetunnel 隧道施工中岩体初始参数的外推技术
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2022-12-20 DOI: 10.37023/ee.9.1-2.3
N. Marinković, M. Jovanovski, Elefterija Zlatanović, Lazar Zivkovic
It is important to perform research to the degree that it is adequate to identify the features of the terrain composition, before, during, and after the building of facilities since predicting the behaviour of rock mass during tunnel construction is a complicated engineering challenge. Engineering research works in laboratories and in the field are of different scope and methodology during testing. In this paper, the established interdependencies of some of the basic parameters obtained during the testing of rock mass are presented: Edyn = f(Vp), Edyn = f(RMR) i Edyn = f(Q). Also, the relations between the engineering systems of rock mass classification and seismic primary waves are derived. RMR = f(Vp), Q = f(Vp). The relations were based on the examination of the rock mass for the construction needs of the tunnel on the Nis-Merdare highway. The results obtained in this study can be applied in environments that have similar lithological and structural characteristics.
由于预测隧道施工期间的岩体行为是一项复杂的工程挑战,因此进行足够的研究以确定设施建设之前,期间和之后的地形组成特征是很重要的。在实验室和现场进行的工程研究工作在测试过程中具有不同的范围和方法。本文给出了岩体试验中得到的基本参数Edyn = f(Vp)、Edyn = f(RMR)和Edyn = f(Q)之间已建立的相互关系。并推导了岩体分类工程系统与地震主波的关系。RMR = f(Vp), Q = f(Vp)这些关系是根据尼斯-默代尔高速公路隧道施工需要对岩体进行的检查而建立的。本研究结果可应用于具有相似岩性和构造特征的环境。
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引用次数: 0
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Environmental & Engineering Geoscience
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