NSG2021 27th European Meeting of Environmental and Engineering Geophysics最新文献

Transept Foundations of a 12th Century Chapel Revealed by Geophysical and Photogrammetric Prospection 地球物理和摄影测量勘探揭示的12世纪教堂的耳堂基础

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120118

C. Fauchard, L. Aillaud, A. Legrand, R. Antoine, V. Guilbert, C. Ledun, B. Beaucamp

{"title":"Transept Foundations of a 12th Century Chapel Revealed by Geophysical and Photogrammetric Prospection","authors":"C. Fauchard, L. Aillaud, A. Legrand, R. Antoine, V. Guilbert, C. Ledun, B. Beaucamp","doi":"10.3997/2214-4609.202120118","DOIUrl":"https://doi.org/10.3997/2214-4609.202120118","url":null,"abstract":"Summary This study presents the work carried out at the Notre-Dame-du-Val chapel located in Sotteville-sur-Mer (Normandy, France). Local authorities are considering restoration work and have requested a geophysical survey of the surroundings. First, aerial photography by drone yields a Structure from Motion (SfM) model of the exterior of the chapel, completed by a 3D interior model. Geophysical prospecting consists in imaging shallow surface of surroundings, with help of Ground Penetrating Radar (GPR) and Electrical Resistivity Imaging (ERI). GPR measurements clearly reveal former apses on both sides of the chapel, corresponding to the transepts meets in perfect agreement with the presence of filled-in openings visible in the 3D interior photogrammetric model. The ERI measurements underline the presence of a very resistive substratum, probably corresponding to the local chalky formation where the chapel was built. Besides, resistive formation underlines the potential earthworks carried out to support the transepts meets, correlated with GPR signals. Several GPR and ERI anomalies have not been interpreted and deserve deeper investigation: archaeological excavations remains the only solution to confirm their nature. The restitution within the photogrammetric model allows a very explicit display of the results, integrating the architecture of the chapel and geophysical measurements.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126033113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Application of Distributed Acoustic Sensing for Shallow Marine Investigations an Intertidal Case Study 分布式声传感在浅海调查中的应用——以潮间带为例

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120142

A. Trafford, S. Donohue, R. Ellwood, A. Godfrey, L. Wacquier

{"title":"The Application of Distributed Acoustic Sensing for Shallow Marine Investigations an Intertidal Case Study","authors":"A. Trafford, S. Donohue, R. Ellwood, A. Godfrey, L. Wacquier","doi":"10.3997/2214-4609.202120142","DOIUrl":"https://doi.org/10.3997/2214-4609.202120142","url":null,"abstract":"Summary Typically, there is a paucity of geotechnical information available to designers of offshore foundations for marine renewable structures, which often results in highly conservative designs. With an increased recognition of the value of shear wave velocity measurements as a critical design parameter in the marine geotechnical industry, there is a real requirement to develop a cost effective shear wave seismic data acquisition methodology. This case study documents field trials at Dollymount Strand, Dublin using fibre optic cables as continuous seismic sensors for the collection of surface wave data. Data were collected using an OptaSense ODH4 interrogator connected to a 1000m long CST armoured single mode fibre optic cable. A Sercel Mini G airgun, operated from a survey vessel, was used as the seismic source. The collection of data from an intertidal site allowed for direct comparison of different acquisition methodologies in both dry and flooded conditions. The findings of the study showed that Distributed Acoustic Sensing (DAS) was effective at collecting shallow marine seismic data for analysis using the Multichannel Analysis of Surface Waves (MASW) method. Using DAS in this environment has great potential due to the rapid data acquisition compared to other currently available technologies.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115517817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Imaging Clogging in a Treatment Wetland Using Time-Domain Induced Polarization 利用时域诱导极化成像堵塞处理湿地

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120037

R. García‐Artigas, M. Himi, L. Rivero, A. Revil, A. U. Garcia, R. Lovera, A. Sendrós, C. Abancó, A. Casas

{"title":"Imaging Clogging in a Treatment Wetland Using Time-Domain Induced Polarization","authors":"R. García‐Artigas, M. Himi, L. Rivero, A. Revil, A. U. Garcia, R. Lovera, A. Sendrós, C. Abancó, A. Casas","doi":"10.3997/2214-4609.202120037","DOIUrl":"https://doi.org/10.3997/2214-4609.202120037","url":null,"abstract":"Summary Treatment wetlands are engineered systems for small communities that have been designed to take advantage of the same processes that occur in natural wetlands, the main problem affecting treatment wetlands is the development of clogging wich leads to the exclusion of some subparts of the filter, becoming ineffective for the treatment critically reducing the lifetime of the plant. Time-domain induced polarization is used to image clogging distribution of a gravel filter from a horizontal subsurface flow treatment wetland. Experimental data performed on the laboratory demonstrates the linear relationship between the normalized chargeability and the amount of clogging in the gravel filter because of the substantial increase of the cation exchange capacity caused by clogging coating these grains. Therefore, we were able to convert the normalized chargeability tomograms obtained with the field data into a 3D distribution of the percent clogging. This method allows to identify the zones were the clogging has accumulated through the filter and therefore predict preferential flow paths and dead flow zones. This is an important task to plan preventive measures and anticipate the filter obstruction that may decreases the effectiveness of the wastewater treatment system.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123238721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D DAS Full Waveform Inversion (FWI) Case Study for SAGD Steam Chamber Imaging 三维DAS全波形反演(FWI) SAGD蒸汽室成像案例研究

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120111

W. Wang, H. Feng, T. Kay, A. Knudsen, A. Ayre

{"title":"3D DAS Full Waveform Inversion (FWI) Case Study for SAGD Steam Chamber Imaging","authors":"W. Wang, H. Feng, T. Kay, A. Knudsen, A. Ayre","doi":"10.3997/2214-4609.202120111","DOIUrl":"https://doi.org/10.3997/2214-4609.202120111","url":null,"abstract":"Summary Distributed Acoustic Sensing (DAS) is based on Rayleigh scattering principles used to determine acoustic strain signals over long distances, effectively turning the optic fiber cable into a series of geophones. Once the data is acquired, advanced processing techniques such as Full Waveform Inversion (FWI) can be applied to obtain information for a wide variety of applications. Historically DAS is used as a complementary tool to improve understanding of flow distribution along the entire length of a producing wellbore. It is commonly used in collaboration with DTS to interpret and define flow allocation throughout the life of the well. 3D DAS Vertical Seismic Profiles (VSPs) also can be used as a cost-effective tool for the time-lapse reservoir monitoring due to the finer channel sampling and flexibility in deploying the fiber-optic cables. The application of FWI to 3D DAS is an innovative way to image the steam chamber during the steam-assisted gravity drainage (SAGD) process for Oil Sands. This successful case study demonstrates that 3D DAS FWI can provide a significantly more cost-effective and technically equivalent alternative to conventional 4D seismic programs.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123724005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Fractional Differential Model for the Electrical Conductivity of Clay Rocks 粘土岩石电导率的分数阶微分模型

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120039

P. Cosenza, R. Giot, A. Giraud, S. Hedan

{"title":"A Fractional Differential Model for the Electrical Conductivity of Clay Rocks","authors":"P. Cosenza, R. Giot, A. Giraud, S. Hedan","doi":"10.3997/2214-4609.202120039","DOIUrl":"https://doi.org/10.3997/2214-4609.202120039","url":null,"abstract":"Summary A micro-macro approach is proposed to model the effects of surface phenomena occurring at the pore fluid/solid interface on the electrical conductivity of clay rocks. This new model is a generalization of the so-called differential scheme (DS) used to infer the effective properties of a composite made up of several materials. It is named the fractional differential scheme and is based on a fractional integral formulation of the DS for a porous medium considered as a two-component composite. The formulation of the fractional DS introduces two parameters: a cementation exponent m and a fractional order α. The fractional order α is assumed to account for the amplitude of the so-called surface conduction on clay minerals. Both parameters m and α are inverted from a set of electrical conductivity measurements obtained on clay rocks. The inversion results demonstrate that the fractional DS model is able to capture the dependence of the cation concentration on the effective electrical conductivity of the clay rocks under study. Our results also show that the fractional order α can be considered an indirect indicator of the amplitude of physico-chemical interactions between hydrated cations and swelling clay minerals occurring at the pore fluid/solid interface.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132122550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Marine Gas Hydrate Deposits Study: Temperature Inversion Advantages 海洋天然气水合物矿床研究:温度反演优势

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120132

A. Vasilev, E. Kozhuharov, N. Botoucharov, I. Genov, P. Petsinski, R. Pehlivanova

引用次数: 0

A heat tracing experiment using cross-borehole time-lapse ERT 跨井延时ERT热伴热实验

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120041

B. Shariatinik, A. Bouchedda, E. Gloaguen, J. Raymond, G. Fabien-Ouellet

引用次数: 0

Correlation between Distributed Rayleigh Sensing (DRS) and Moisture Sensors as Indicators of Slope Instability 分布瑞利遥感(DRS)与水分传感器作为边坡失稳指标的相关性

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120110

P. Clarkson, R. Crickmore, A. Godfrey, C. Minto, J. Chambers, B. Dashwood, D. Gunn, L. Jones, P. Meldrum, D. Morgan, A. Watlet, J. Whiteley

{"title":"Correlation between Distributed Rayleigh Sensing (DRS) and Moisture Sensors as Indicators of Slope Instability","authors":"P. Clarkson, R. Crickmore, A. Godfrey, C. Minto, J. Chambers, B. Dashwood, D. Gunn, L. Jones, P. Meldrum, D. Morgan, A. Watlet, J. Whiteley","doi":"10.3997/2214-4609.202120110","DOIUrl":"https://doi.org/10.3997/2214-4609.202120110","url":null,"abstract":"Summary This paper describes the verification of Distributed Rayleigh Sensing (DRS), traditionally associated with acoustic sensing, for monitoring low frequency activity on a slope prone to landslides that is used as the British Geological Survey’s landslide observatory at Hollin Hill, North Yorkshire, U.K. The observatory is monitored using a variety of geological survey instruments and provides a unique opportunity to compare measurement systems that have very different principles of operation. Previous studies of the slope have shown good correlation between the low frequency strain and temperature measured using the fibre with prior knowledge of the geology of the site and longer-term measurements made on more established geological survey instruments. This paper presents a more detailed comparison of measurements made on the DRS system over the winter of 2020/2021, with measurements of soil moisture content made on point sensors and estimates of ground movement measured using GPS marker posts. The DRS system is sensitive to multiple important indicators of slope instability and can monitor ground movement effectively. Areas of unstable ground can be clearly identified by the larger changes observed in the fibre output in those regions.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125676619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping the Traps of Yakutia Kimberlite Province Using the Controlled Source Radiomagnetotellurics 雅库特金伯利岩省可控源辐射大地电磁圈闭制图

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120018

A. Saraev, A. Shlykov, B. Tezkan

引用次数: 0

Data Fusion of ERT and Infiltration Tests, Using Bayesian Maximum Entropy to Mapping Saturated Hydraulic Conductivity 基于贝叶斯最大熵映射饱和导电性的ERT和浸润试验数据融合

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120101

S. Rabouli, M. Serre, V. Dubois, J. Gance, H. Henine, P. Molle, C. Truffert, R. Clément

引用次数: 0