arXiv: Geophysics最新文献_第5页

New Variable Compliance Method for Estimating In-Situ Stress and Leak-Off from DFIT Data 基于DFIT数据估算地应力和泄漏量的变柔度新方法

arXiv: Geophysics Pub Date : 2017-10-09 DOI: 10.2118/187348-MS

HanYi Wang, M. Sharma

引用次数: 19

On Borrowed Time: The Past, Present, and Future of Virginia's Barrier Islands under Differing Sea-Level Rise Scenarios 借来的时间:不同海平面上升情景下弗吉尼亚堰洲岛的过去、现在和未来

arXiv: Geophysics Pub Date : 2017-10-04 DOI: 10.13016/M23X83N0P

S. Hamilton, J. Talbot, Carl Flint, Adam Phipps-Dickerson, Tyler Wilson, Mychael Smith

{"title":"On Borrowed Time: The Past, Present, and Future of Virginia's Barrier Islands under Differing Sea-Level Rise Scenarios","authors":"S. Hamilton, J. Talbot, Carl Flint, Adam Phipps-Dickerson, Tyler Wilson, Mychael Smith","doi":"10.13016/M23X83N0P","DOIUrl":"https://doi.org/10.13016/M23X83N0P","url":null,"abstract":"Virginia's barrier islands constitute one of the most undeveloped shorelines of the eastern US. Aside from a few islands in the north, the islands are uninhabited and managed for conservation. These islands play important environmental, cultural, and economic roles along Virginia's Eastern Shore. Climate change driven sea-level rise is already having a major impact on these islands and threatens their existence. We utilize transect analysis across each of the barrier islands to depict the shoreline change trends annually from 1850 to 2010. We then utilize time series forecasting and panel modeling to estimate future shorelines up to and including a best estimate 2099 CE shoreline. Results indicate that across almost all the islands, the shoreline retreat rate has been increasing over time. Additionally, we find that year 2100 CE sea-level rise scenarios are likely to accelerate the shoreline retreat occurring on these islands and may erase many of them all together. We find that the northern islands of Wallops and North Assateague will remain generally stable whereas many of the remaining islands will likely experience rapid shoreline retreat under future sea-level rise scenarios.","PeriodicalId":390991,"journal":{"name":"arXiv: Geophysics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121163989","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

Elastic-Viscoplastic Model for Clays: Development, Validation, and Application 粘土的弹粘塑性模型:发展、验证和应用

arXiv: Geophysics Pub Date : 2017-10-01 DOI: 10.1061/(ASCE)EM.1943-7889.0001345

M. N. Islam, C. Gnanendran

{"title":"Elastic-Viscoplastic Model for Clays: Development, Validation, and Application","authors":"M. N. Islam, C. Gnanendran","doi":"10.1061/(ASCE)EM.1943-7889.0001345","DOIUrl":"https://doi.org/10.1061/(ASCE)EM.1943-7889.0001345","url":null,"abstract":"This paper presents an elastic-viscoplastic (EVP) constitutive model in triaxial space and general stress space for isotropic clays. The EVP model is anchored in the bounding surface theory along with the mapping rule and adopts a critical state soil mechanics framework. It incorporates creep effects, and a non-linear creep function is used in the model. The EVP deformation of clay is integrated considering a reference surface and loading surface. An image parameter is deduced to establish the image surface. The strain rate tensor of the model comprises elastic-strain-rate tensor and viscoplastic-strain-rate tensor. The model formulation is capable of accounting for composite as well as single surface ellipses. Parameters of the model can be extracted from conventional oedometer and triaxial tests. The model performance is validated by capturing the behaviours in creep test, relaxation test, strain-rate effect test, and over consolidation ratio effect test of Kaolin clay, Hong Kong Marine Deposit clay, and Fukakusa clay. The model is also implemented in a Finite Element (FE) code and used to predict the long-term performance of the Nerang Broadbeach Roadway embankment constructed in Australia. The long-term settlement prediction of this embankment is also compared with that obtained with the Modified Cam Clay (MCC) model. Pertinent details of the theoretical framework of the proposed EVP model along with its validation, FE implementation and field application are discussed in this paper.","PeriodicalId":390991,"journal":{"name":"arXiv: Geophysics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117249607","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: 19

A Numerical Study of Thermal-Hydraulic-Mechanical (THM) Simulation with the Application of Thermal Recovery in Fractured Shale Gas Reservoirs 热-水力-力学(THM)模拟及其在裂缝性页岩气藏热采中的应用研究

arXiv: Geophysics Pub Date : 2017-08-01 DOI: 10.2118/183637-PA

HanYi Wang

引用次数: 20

Deep borehole disposal of nuclear waste: US perspective 深钻孔处理核废料:美国的观点

arXiv: Geophysics Pub Date : 2017-07-18 DOI: 10.1016/B978-0-08-100642-9.00004-9

P. Brady, G. Freeze, Kristopher L. Kuhlman, E. Hardin, D. Sassani, R. MacKinnon

引用次数: 5

Low Frequency Tilt Seismology with a Precision Ground Rotation Sensor 使用精密地面旋转传感器的低频倾斜地震学

arXiv: Geophysics Pub Date : 2017-07-10 DOI: 10.1785/0220170148

Michael Ross, K. Venkateswara, C. Hagedorn, J. Gundlach, J. Kissel, J. Warner, H. Radkins, T. Shaffer, M. Coughlin, P. Bodin

引用次数: 11

HTEM data improve 3D modelling of aquifers in Paris Basin, France HTEM数据改进了法国巴黎盆地含水层的三维建模

arXiv: Geophysics Pub Date : 2017-07-05 DOI: 10.3997/2214-4609.201702165

G. Martelet, P. Reninger, J. Perrin, B. Tourlière

{"title":"HTEM data improve 3D modelling of aquifers in Paris Basin, France","authors":"G. Martelet, P. Reninger, J. Perrin, B. Tourlière","doi":"10.3997/2214-4609.201702165","DOIUrl":"https://doi.org/10.3997/2214-4609.201702165","url":null,"abstract":"In Paris Basin, we evaluate how HTEM data complement the usual borehole, geological and deep seismic data used for modelling aquifer geometries. With these traditional data, depths between ca. 50 to 300m are often relatively ill-constrained, as most boreholes lie within the first tens of meters of the underground and petroleum seismic is blind shallower than ca. 300m. We have fully reprocessed and re-inverted 540km of flight lines of a SkyTEM survey of 2009, acquired on a 40x12km zone with 400m line spacing. The resistivity model is first \"calibrated\" with respect to ca. 50 boreholes available on the study area. Overall, the correlation between EM resistivity models and the hydrogeological horizons clearly shows that the geological units in which the aquifers are developed almost systematically correspond to relative increase of resistivity, whatever the \"background\" resistivity environment and the lithology of the aquifer. In 3D Geomodeller software, this allows interpreting 11 aquifer/aquitar layers along the flight lines and then jointly interpolating them in 3D along with the borehole data. The resulting model displays 3D aquifer geometries consistent with the SIGES \"reference\" regional hydrogeological model and improves it in between the boreholes and on the 50-300m depth range.","PeriodicalId":390991,"journal":{"name":"arXiv: Geophysics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125592563","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

Numerical Evaluation of Fragility Curves for Earthquake-Liquefaction-Induced Settlements of an Embankment 路基地震液化沉降易损性曲线的数值评价

arXiv: Geophysics Pub Date : 2017-06-01 DOI: 10.1061/9780784480700.003

C. Khalil, I. Rapti, F. Lopez-Caballero

{"title":"Numerical Evaluation of Fragility Curves for Earthquake-Liquefaction-Induced Settlements of an Embankment","authors":"C. Khalil, I. Rapti, F. Lopez-Caballero","doi":"10.1061/9780784480700.003","DOIUrl":"https://doi.org/10.1061/9780784480700.003","url":null,"abstract":"The major cause of earthquake damage to an embankment is the liquefaction of the soil foundation that induces ground level deformations. It is well known that the liquefaction appears when the soil loses its shear strength due to the excess of pore water pressure. This phenomenon leads to several disastrous damages of the soil foundation. The aim of this paper is to assess numerically the effect of the liquefaction-induced settlement of the soil foundation on an embankment due to 76 real earthquakes extracted from the PEER database. For this purpose, a 2D finite element model of a dam founded on a layered soil/rock profile was considered. An elastoplastic multi-mechanism model was used to represent the soil behaviour. The crest settlement of the embankment was selected as the quantifiable damage variable of the study. Fragility functions were drawn to give the probability exceedance of some proposed damage levels as function of a seismic severity parameter. In addition, the anisotropy was tested by the change in the soil permeability and a comparison with the isotropy was held. According to the results, the crest settlement increases with the peak ground acceleration and the fragility functions showed that above 0.2g, the probability to have moderate damage in the anisotropic case reaches unity whereas it is lesser in the isotropic case. The embankment will not show serious damage for this same value of acceleration in the two cases.","PeriodicalId":390991,"journal":{"name":"arXiv: Geophysics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121813667","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: 3

Does forest replacement increase water suply in watersheds? Analysis through hydrological simulation 森林替代会增加流域的供水吗?水文模拟分析

arXiv: Geophysics Pub Date : 2017-04-28 DOI: 10.5194/HESS-2017-281

R. Machado, L. C. L. Ribeiro, M. Lopes

引用次数: 0

What Factors Control Shale Gas Production and Production Decline Trend in Fractured Systems: A Comprehensive Analysis and Investigation 裂缝系统页岩气产量控制因素及产量递减趋势的综合分析与研究

arXiv: Geophysics Pub Date : 2017-04-01 DOI: 10.2118/179967-PA

HanYi Wang

引用次数: 64