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UAS-Derived Surficial Deformation around the Epicenter of the 2016 Mw 5.8 Pawnee, Oklahoma, USA, Earthquake 2016年美国俄克拉何马州波尼市5.8级地震震中附近的地表变形
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-11-01 DOI: 10.2113/eeg-2359
Olufeyisayo B. Ilesanmi, Xue Liang, F. Oboh-Ikuenobe, J. Rogers, M. Abdelsalam, Jordan A. Feight, E. C. Witt
Unmanned aerial systems (UAS) provide a framework for recording perishable surficial data or information. Open fractures exhibiting regular en-echelon patterns were captured by a 12-megapixel, FL-9 mm camera attached to a Phantom IV UAS over the epicenter of the magnitude (Mw) 5.8 earthquake of September 3, 2016, 15 months later. The Digital Surface Models (DSMs) and orthoimagery offered a spatial resolution (∼1 cm) sufficient to identify small-scale plastic deformations that appear to be controlled by en-echelon joint sets developed in the underlying formation. The fissure boundaries and intersections are remarkably linear and sharp. They appeared to have been recently formed, presumably by seismic swarms believed to have been associated with wastewater injection. The DSMs revealed a series of conjugate patterns suggestive of regional systematic joints with apparent subsidence of infilling up to 50 cm. The earthquakes emanated from the Precambrian metamorphic basement, with epicentral clusters at ∼5- and 8-km depths. Low energy release from depths >1.5 km appears to be locally attenuated by an unconsolidated “soil cap,” which likely formed an impedance contrast. The maximum deformation direction from the cumulative energy of earthquakes correlates with a wrench fault tectonics model that could conceivably produce the observed en-echelon joint sets observed in the orthoimagery and DSMs. These features were observed within 275 m of the reported Mw 5.8 epicenter. The remarkably linear repeating pattern of deformation appears to express fissures that preserve the wrench fault fractures generated by the Mw 5.8 earthquake emanating from discontinuity suites within marine sandstone, shale, and limestone of Pennsylvanian to Permian age.
无人机系统(UAS)提供了一个记录易腐烂的地表数据或信息的框架。15个月后的2016年9月3日,在震级(Mw) 5.8级地震的震中上空,安装在Phantom IV无人机上的一台1200万像素FL-9毫米相机捕捉到了呈现规则雁梯队模式的开放裂缝。数字表面模型(DSMs)和正射影成像提供了足够的空间分辨率(~ 1厘米),以识别似乎由下垫层中形成的梯队节理集控制的小规模塑性变形。裂缝的边界和交叉点是明显的线性和尖锐的。它们似乎是最近形成的,可能是由地震群形成的,据信这些地震群与废水注入有关。DSMs显示了一系列提示区域系统节理的共轭模式,充填沉降明显达50 cm。地震起源于前寒武纪变质基底,震中群位于~ 5 km和8 km深度。深度>1.5 km的低能量释放似乎被未固结的“土帽”局部衰减,这可能形成了阻抗对比。地震累积能量的最大变形方向与扳手断层构造模型相关,该模型可能产生正射影像图和dsm中观测到的雁梯队节理集。这些特征是在距报道的5.8级震中275米范围内观测到的。这种显著的线性重复变形模式似乎表达了裂缝,这些裂缝保存了由里氏5.8级地震产生的钳状断层裂缝,这些裂缝来自宾夕法尼亚至二叠纪时期海相砂岩、页岩和石灰岩的不连续层。
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引用次数: 0
2020 Student Professional Paper - Graduate Level Integrating Design Parameters for Reseeding and Mulching after Wildfire: An Example from the 416 Fire, Colorado 2020年学生专业论文-研究生水平野火后重新播种和覆盖物的集成设计参数:以科罗拉多州416火灾为例
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-11-01 DOI: 10.2113/eeg-d-20-00089
A. Graber
Wildfires burn vegetation over large areas of land, removing ground cover and frequently increasing potential for erosion-related hazards, such as debris flows, soil loss, and increased sedimentation downstream. Reseeding and mulching are two techniques used to prevent erosion and foster re-establishment of native plant species. However, design guidelines and specifications for reseeding and mulching programs are scattered in the literature, impeding efforts to follow best practices when preparing mitigation plans. This article summarizes guidelines and specifications for both reseeding and mulching and applies them in a sample GIS-based reseeding and mulching design for a basin burned in 2018 by the 416 Fire, Colorado. In addition to relying only on remote data, the method presented here aids operators and management personnel in making quick assessments of mitigation needs and areas suitable for mitigation, allowing for prompt responses to time-sensitive erosion hazards.
野火烧毁了大片土地上的植被,使地面覆盖物消失,并经常增加与侵蚀有关的危险的可能性,如泥石流、土壤流失和下游沉积物增加。重新播种和覆盖是防止侵蚀和促进本地植物物种重建的两种技术。然而,关于重新播种和覆盖计划的设计指南和规范在文献中是分散的,这阻碍了在准备减灾计划时遵循最佳实践的努力。本文总结了补种和覆盖的指导方针和规范,并将其应用于2018年科罗拉多州416火灾烧毁的盆地的基于gis的补种和覆盖设计样本。除了仅依赖远程数据外,本文介绍的方法还有助于操作人员和管理人员快速评估缓解需求和适合缓解的地区,从而对时间敏感的侵蚀危险作出迅速反应。
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引用次数: 0
The Effectiveness of Reactive Materials for Contaminant Removal in the Process of Coal Conversion 活性物质对煤转化过程中污染物去除效果的研究
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-10-08 DOI: 10.2113/eeg-2328
J. Grabowski, A. Tokarz
The technology of permeable reactive barriers (PRB) is one of the most frequently developed methods for protecting soil and water from pollution. These barriers are zones filled with reactive material in which contaminants are immobilized and/or their concentration is reduced to the limit values during the flow of contaminated groundwater. This article presents a study on the efficiency of the removal of contaminants from the post-processing water from the underground coal gasification (UCG) process. The tests were carried out in a laboratory using a flow-through reactor design. The post-processing water came from a UCG experiment carried out in the Barbara mine, Mikołów, Poland. Activated coal, zeolite, and nano-iron were used as the reactive materials in the experiment. The obtained results were compared to tests carried out with reference water (artificial) with strictly defined characteristics. Research has shown that activated carbon is the most effective material used in the reaction zone for removing organic contaminants from groundwater generated during the coal conversion process. A new feature is the use of PRB in a georeactor zone during the UCG process to limit the potential risk of contamination spreading in the case of uncontrolled and unpredictable operation, in emergency situations related to gas leaks into the environment, during underground fires, and for water polluted by high-toxicity substances.
渗透反应屏障(PRB)技术是目前发展最为迅速的一种保护土壤和水体不受污染的技术。这些屏障是充满活性物质的区域,污染物在其中被固定和/或在受污染的地下水流动期间其浓度降低到极限值。本文研究了煤地下气化(UCG)工艺后处理水中污染物的去除效率。试验是在实验室中使用流动式反应器设计进行的。后处理用水来自于在波兰Mikołów的芭芭拉矿进行的UCG实验。实验以活性煤、沸石、纳米铁为反应原料。所得结果与具有严格定义特征的参考水(人工水)进行的试验进行了比较。研究表明,活性炭是反应区用于去除煤转化过程中产生的地下水中有机污染物的最有效材料。新的特点是在UCG过程中,在地质反应堆区域使用PRB,以限制在不受控制和不可预测的操作情况下,在与气体泄漏到环境中的紧急情况下,在地下火灾期间,以及被高毒性物质污染的水中,污染扩散的潜在风险。
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引用次数: 1
Using Reference Springs to Describe Expected Flow, Temperature, and Chemistry Conditions for Geologically Related Groups of Springs 使用参考泉水来描述与地质相关的泉水群的预期流量、温度和化学条件
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-08-27 DOI: 10.2113/eeg-2312r
S. Swanson, Grace Graham, D. Hart
Reference springs can result in improved conceptual models of groundwater flow and an expanded understanding of the temporal variations in flow, temperature, and chemistry that may be expected for related springs. The reference spring concept is patterned off of the common practice of establishing reference sites to establish benchmark ecological conditions. We use the term “reference spring” to indicate a spring that is minimally disturbed and representative of a geologically related group of springs. Seven reference springs were selected from six previously defined groups that represent over 400 springs in Wisconsin, United States. Geologic cross-sections were constructed for each reference spring site, and springs were monitored for flow, spring-water temperature, and chemistry for up to 4 years, revealing new relationships within and between groups. Examples include: a range of temperature conditions that can be related to the depth of groundwater circulation for springs discharging from layered bedrock uplands, and differences in thermal patterns and specific conductance that can be related to the permeability and solubility of surficial glacial deposits for springs emanating from uneven glacial terrain. The results suggest that establishing reference springs may be a useful approach in other regions where geologically related groups of spring have been identified.
参考泉水可以改进地下水流动的概念模型,并扩大对相关泉水的流量、温度和化学的时间变化的理解。参考春天的概念是基于建立参考地点以建立基准生态条件的常见做法。我们使用“参考弹簧”一词来表示受干扰最小的弹簧,并代表地质上相关的弹簧组。七个参考弹簧是从六个先前定义的组中选出的,这些组代表了美国威斯康星州的400多个弹簧。研究人员为每个参考泉水地点绘制了地质剖面,并对泉水进行了长达4年的流量、泉水温度和化学成分监测,揭示了群体内部和群体之间的新关系。例子包括:与从分层基岩高地流出的泉水的地下水循环深度有关的一系列温度条件,以及与来自不均匀冰川地形的泉水的表面冰川沉积物的渗透性和溶解度有关的热模式和特定电导的差异。结果表明,建立参考弹簧可能是一种有用的方法,在其他地区的地质相关群的弹簧已经确定。
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引用次数: 4
Foreword to the Environmental & Engineering Geoscience Journal Special Edition on Springs 环境与工程地球科学杂志春季特别版前言
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-08-27 DOI: 10.2113/eeg-26-03-03
A. Springer
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引用次数: 0
Geochemical Variability in Karst-Siliciclastic Aquifer Spring Discharge, Kaibab Plateau, Grand Canyon 美国大峡谷开巴布高原岩溶-硅屑含水层泉水流量地球化学变异特征
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-08-27 DOI: 10.2113/eeg-2345
Alexander J. Wood, A. Springer, B. Tobin
The source area of groundwater for springs discharging from lithologically variably perched aquifers is essential to understand when establishing baseline aquifer characteristics. Stratigraphic data from hydrostratigraphic outcrops and geochemical data from springs were used to characterize the hydrogeology of a remote, data-poor aquifer. This study focuses on the hydrogeological variability within the shallow karst-siliciclastic Coconino (C) aquifer on the Kaibab Plateau, north of Grand Canyon National Park. Stratigraphic data were collected from 8 locations, and 22 C aquifer springs were sampled for 18 months. Stable isotope analyses indicate that groundwater is biased to winter recharge in the form of snow and shows similar isotopic signature for groundwater storage areas for all C aquifer springs. Stratigraphic analyses show that the primary water-bearing unit in the C aquifer thins dramatically from south to north and has evaporite lithofacies directly above the unit. Principal component analysis (PCA) indicates that the hydrogeochemistry is influenced by SO42−, Cl−, Mg2+, Ca+, specific conductivity, alkalinity, and δD variability. The stratigraphic variability influences geochemistry at multiple locations and has geochemical variabilities that correlate with changing lithology. Based on the PCA results, groundwater sub-basins were delineated based on geochemical variability. This study provides new analytical tools for land managers and karst hydrogeologists to evaluate lithologically complex aquifers by evaluating the stratigraphy and with high-resolution data. Cost-effective stratigraphic analyses and high-resolution spring sampling can and should be used to evaluate lithologically complex aquifers in remote, data-poor regions.
在建立基准线含水层特征时,了解从岩性变化的含水层中流出的泉水的地下水源区是至关重要的。来自水文地层露头的地层数据和来自泉水的地球化学数据被用来描述一个偏远的、数据贫乏的含水层的水文地质特征。本文研究了美国大峡谷国家公园北部凯巴布高原浅层岩溶-硅-碎屑科科尼诺(C)含水层的水文地质变异性。在18个月的时间里,从8个地点收集了地层资料,并对22个C含水层泉进行了采样。稳定同位素分析表明,地下水倾向于以雪的形式冬季补给,并且在所有C含水层泉的地下水储存区显示出相似的同位素特征。地层分析表明,C含水层主要含水单元自南向北明显变薄,其正上方为蒸发岩相。主成分分析(PCA)表明,水文地球化学受SO42−、Cl−、Mg2+、Ca+、比电导率、碱度和δD变率的影响。地层变异影响着多个地点的地球化学,并具有与岩性变化相关的地球化学变异。在主成分分析结果的基础上,根据地球化学变率圈定了地下水子流域。该研究为土地管理者和岩溶水文地质学家提供了新的分析工具,通过地层评价和高分辨率数据来评价岩性复杂的含水层。具有成本效益的地层分析和高分辨率的春季采样可以而且应该用于评估偏远、数据贫乏地区岩性复杂的含水层。
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引用次数: 3
Common Spring Types in the Valley and Ridge Province: There Is More than Karst 谷岭省常见的泉水类型:岩溶不止
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-08-27 DOI: 10.2113/eeg-2321
D. Vesper, E. Herman
The Valley and Ridge Province (V&R) of the central Appalachians is rich in springs that support ecosystems, provide local water resources, and export water from the region. Although there has been extensive research on springs in the province, the focus has been on chemically variable karst springs. The purpose of this work is to identify common spring types found in the V&R based on an analysis of three regions. Three types of V&R springs are included in this comparison, and their relationship to more general classification systems is included. Headwater springs, located near ridge tops and along ridge flanks, are typically small, may be ephemeral, have localized flow paths, and are associated with siliciclastic units. Karst springs, generally located in the valleys, include both the more chemically variable limestone springs and the more stable dolomite springs. Thermal warm springs, with temperatures higher than the mean annual air temperature, are less common than the other spring types; they may be large and are typically associated with major thrust faults. The temperature, chemistry, and locations of the springs are controlled by the structural geology and topography as well as the formations and lithologies through which the recharge water travels. There is overlap in the water chemistry and storm responses of the spring groups, but some general trends can be identified, such as lower pH in the headwater springs. The V&R springs are critical resources, but their sustainability, chemistry, and hydrology need to be considered within the local geologic framework.
阿巴拉契亚山脉中部的山谷和山脊省(V&R)拥有丰富的泉水,这些泉水支撑着生态系统,为当地提供水资源,并从该地区出口水。虽然对该省的温泉进行了广泛的研究,但重点是化学变化的喀斯特温泉。这项工作的目的是根据对三个地区的分析,确定在V&R中发现的常见弹簧类型。三种类型的V&R弹簧包括在这个比较中,以及它们与更一般的分类系统的关系。位于山脊顶部附近和山脊两侧的源泉通常很小,可能是短暂的,有局部流动路径,并与硅塑性单元有关。岩溶泉一般位于山谷中,既包括化学性质变化较大的石灰岩泉,也包括化学性质较为稳定的白云岩泉。温度高于年平均气温的温泉比其他类型的温泉更少见;它们可能很大,通常与主要逆冲断层有关。泉水的温度、化学成分和位置由构造地质和地形以及补给水流经的地层和岩性控制。泉水群的水化学和风暴响应有重叠,但可以确定一些总体趋势,如源头泉的pH值降低。V&R泉水是至关重要的资源,但它们的可持续性、化学和水文需要在当地地质框架内考虑。
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引用次数: 3
Influence of Desert Springs on Habitat of Endangered Zuni Bluehead Sucker (Catostomus discobolus yarrowi) 沙漠泉水对濒危祖尼蓝头吸盘生境的影响
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-08-27 DOI: 10.2113/eeg-2330
R. Frus, L. Crossey, C. Dahm, K. Karlstrom, L. Crowley
Located on the southeastern part of the Colorado Plateau, the Zuni Mountains are home to the endangered Zuni Bluehead Sucker (ZBS) (Catostomus discobolus yarrowi). A 4-year study was conducted on a low-flow (<80 cm3/s) hillslope spring and intermittent stream, that are home to one of the three remaining ZBS populations. Seasonal measurements of physical and hydrochemical parameters were used to estimate the contribution of groundwater to the stream and to identify geologic and hydrologic controls for the spring discharge. Seasonal concentrations and standard deviations (s) of Mg2+ were used to determine that the spring water (5.6 mg/L; s = 0.4) and surface water up-gradient from the spring input (10.7 mg/L; s = 11.2) is from different sources. Surface water down-gradient from the spring input maintain ZBS populations and is a mixture of spring water and up-gradient surface water. Mass solution mixing was used to determine spring water contributes up to 99 percent of the down-gradient water during drier seasons. Isotopes (δD, δ18O, 3H) indicate that the spring water has been recharged primarily from snowmelt within the last 70 years, while up-gradient surface water is seasonal runoff from rain and snowmelt. Continuous monitoring of dissolved oxygen (DO) mean concentrations (up-gradient = 1.6 mg/L and down-gradient = 5.7 mg/L) indicated that surface water up-gradient from the spring input are anoxic and unable to support ZBS. Surface water down-gradient from the spring input maintain appropriate DO concentrations due to perennially discharging spring waters re-aerating downstream habitats.
祖尼山脉位于科罗拉多高原的东南部,是濒临灭绝的祖尼蓝头Sucker (ZBS) (Catostomus disbolus yarrowi)的家园。一项为期4年的研究是在低流量(<80 cm3/s)的山坡泉水和间歇溪流上进行的,这里是ZBS剩余三个种群之一的家园。利用物理和水化学参数的季节性测量来估计地下水对河流的贡献,并确定对春季排放的地质和水文控制。利用Mg2+的季节浓度和标准偏差(s)确定了泉水(5.6 mg/L;s = 0.4)和地表水从泉水输入向上梯度(10.7 mg/L;S = 11.2)来源不同。从泉水输入向下梯度的地表水维持了ZBS种群,并且是泉水和向上梯度的地表水的混合物。使用质量溶液混合来确定在干旱季节泉水贡献高达99%的下降梯度水。同位素(δD、δ18O、3H)表明,近70年来泉水主要由融雪补给,而上梯度地表水主要由降雨和融雪季节性径流补给。连续监测溶解氧(DO)平均浓度(上梯度为1.6 mg/L,下梯度为5.7 mg/L)表明,从泉水输入向上梯度的地表水是缺氧的,不能支持ZBS。由于常年排放的泉水对下游栖息地进行再曝气,从泉水输入向下梯度的地表水保持了适当的DO浓度。
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引用次数: 1
Ancient city connected with the name of the well “Kheyvaq” 古城与井名相连的“凯瓦克”
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-07-20 DOI: 10.37023/ee.7.1.5
Gavkhar Durdiyeva, A. Zargarov, E. Salayev
In this article analytical information and facts about ancient monuments that play a main role in the 2500 years` history of Khiva, monuments of Museum reserve of Ichan Kala which locate on 26 hectares, The well Kheyvaq that is considered cultural and precious heritage of Khiva, The Gates of Ichan Kala and the walls in the length of 2600 meters that surround totally 54 ancient monuments, are presented.
在这篇文章中,分析了在希瓦2500年历史中起主要作用的古代纪念碑的信息和事实,伊坎卡拉博物馆保护区的纪念碑,占地26公顷,被认为是希瓦的文化和珍贵遗产的凯瓦克井,伊坎卡拉的大门和全长2600米的城墙,围绕着54个古代纪念碑。
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引用次数: 1
Integration of natural elements into the traditional house (of Khorezm region, Uzbekistan) for the climate improvement 将自然元素融入传统住宅(乌兹别克斯坦Khorezm地区),以改善气候
IF 0.9 4区 工程技术 Q4 ENGINEERING, ENVIRONMENTAL Pub Date : 2020-07-10 DOI: 10.37023/ee.7.1.6
B. Azizova, A. Osello
This article is dedicated to the analysis and recommendations for the solution of a number of landscape problems related to architecture in the Khiva city. In particular, the advice is given on the use of methods such as "Chor-minor", "Chor-bag", which had existed in the Middle Ages.
本文致力于分析和建议解决希瓦市与建筑有关的一些景观问题。特别是,对中世纪就存在的“Chor-minor”、“Chor-bag”等方法的使用提出了建议。
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引用次数: 1
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Environmental & Engineering Geoscience
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