NSG2021 1st Conference on Hydrogeophysics最新文献_第2页

Original experimental bench based on a large loop for environmental measurements at LSBB 原来的试验台基于一个大回路的环境测量在LSBB

NSG2021 1st Conference on Hydrogeophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120083

C. Dezord, G. Micolau, C. Abbas, A. Mesgouez, E. P. D. Borgo

引用次数: 2

Predicting streaming potentials in partially saturated porous media, a review of capillary-based models 预测部分饱和多孔介质的流势，基于毛细管的模型综述

NSG2021 1st Conference on Hydrogeophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120036

Damien Jougnot, L. D. Thanh, M. Soldi, F. Rembert, J. Vinogradov, L. Guarracino

{"title":"Predicting streaming potentials in partially saturated porous media, a review of capillary-based models","authors":"Damien Jougnot, L. D. Thanh, M. Soldi, F. Rembert, J. Vinogradov, L. Guarracino","doi":"10.3997/2214-4609.202120036","DOIUrl":"https://doi.org/10.3997/2214-4609.202120036","url":null,"abstract":"Summary In the last two decades, geophysical methods are emerging to characterize and monitor hydrosystems in the critical zone. The vadose zone is the compartment of the near surface where the pore space is saturated both by water and air, this yields a very complex and non-linear behavior in terms of water distribution and dynamics. The combination of electrical resistivity imaging and streaming potential have shown their potential to study this compartment. The streaming potential is particularly interesting as it is directly linked to the water flow and therefore offers a way for in situ monitoring. Nevertheless, the use of appropriate petrophysical relationships is required to quantitatively relate the streaming potential signals to the water flow, i.e., to model the electrokinetic coupling phenomena. During the last decade, the development of capillary-based models opened large perspectives to model flow, transport, and coupling in partially saturated porous media. In this contribution, we propose a critical comparison of existing electrokinetic coupling models, from the up-scaling approach they are based on to the capillary size distribution they consider to explain the streaming potential signal, or the shape of the capillaries they consider to explain complex features such as hysteresis.","PeriodicalId":396561,"journal":{"name":"NSG2021 1st Conference on Hydrogeophysics","volume":"81 6 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":"131814211","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 a Fluvial Aquifer in New Zealand Using Airborne Tem, Seismic, and Electrical Soundings 利用机载Tem、地震和电测深测绘新西兰的河流含水层

NSG2021 1st Conference on Hydrogeophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120076

R. Kellett, Z. Rawlinson, R. Westerhoff, R. Reeves, J. Smith, S. Harper, N. Foged, J. Pedersen, P. Maurya

{"title":"Mapping a Fluvial Aquifer in New Zealand Using Airborne Tem, Seismic, and Electrical Soundings","authors":"R. Kellett, Z. Rawlinson, R. Westerhoff, R. Reeves, J. Smith, S. Harper, N. Foged, J. Pedersen, P. Maurya","doi":"10.3997/2214-4609.202120076","DOIUrl":"https://doi.org/10.3997/2214-4609.202120076","url":null,"abstract":"Summary A SkyTEM airborne survey has been flown over 1820 km2 of an area of intense agriculture in Hawkes Bay region of New Zealand. The survey is designed to map the characteristics of a coastal fluvial aquifer and support the management of groundwater resources. Processing the data from a 590 km2 subset of the survey, adjacent three urban centres, has been helped by using ground-based geophysical data. These data include ground-TEM, DC resistivity soundings, and borehole geophysical logs. Seismic reflection data across the region provide constraints on the deeper sections of the aquifer system (200 – 500 m). One of the key aims of the study is to map the variability of the surface geological strata that in places are a recharge zone and in other places a confining layer for the aquifer. The SkyTEM data have a spatial coverage (170 m line spacing and 20–30 m station spacing) that enables these units to be mapped in more detail than is possible with the current boreholes and ground geophysical data. In places the ground-based data provide valuable support for constraining the shallow SkyTEM models where data can be missing and deep parts of the SkyTEM model where the resolution is low.","PeriodicalId":396561,"journal":{"name":"NSG2021 1st Conference on Hydrogeophysics","volume":"45 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":"127077312","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

Integrated Inversion Algorithms to Analyse TDEM Data for Groundwater Resource Assessment in Volcanic Aquifers 火山含水层地下水资源评价TDEM综合反演算法研究

NSG2021 1st Conference on Hydrogeophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120010

A. Vergnano, F. Pace, C. Comina

{"title":"Integrated Inversion Algorithms to Analyse TDEM Data for Groundwater Resource Assessment in Volcanic Aquifers","authors":"A. Vergnano, F. Pace, C. Comina","doi":"10.3997/2214-4609.202120010","DOIUrl":"https://doi.org/10.3997/2214-4609.202120010","url":null,"abstract":"Summary Assessing groundwater resources in arid or semiarid environments often implies problems of previous data scarcity or logistical difficulties. In our work, we analyse one of such contexts, the volcanic island of Fogo, Cape Verde, to evaluate the presence of groundwater for solving drought problems of a local vineyard. We acquired a profile of Time Domain Electromagnetic (TDEM) soundings inside the target area, whereas we surveyed also external zones, near the few available wells, to correlate the acquisitions with stratigraphic information and water analyses. For the interpretation, we tailored three different inversion algorithms. First, we adopted a global search method, to obtain a 1D resistivity model without being trapped in possible local minima of the solution. We chose the stochastic Particle Swarm Optimization (PSO) algorithm, a computational-intelligence method based on the social dynamics of groups of animals. It was the starting point for the second inversion method, based on local search (1D inversion). In the end, a Spatially Constrained Inversion (SCI) interpretated the dataset with a pseudo-2D model. Our work provided a detailed characterization of the resistivity distribution in the subsurface of the vineyard, which outlined the presence of a probable thick suspended aquifer, which may contain exploitable groundwater resources.","PeriodicalId":396561,"journal":{"name":"NSG2021 1st Conference on Hydrogeophysics","volume":"69 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":"132660498","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

Electrical Signatures of Dual Domain Mass Transfer Observed in Rock Cores 岩石岩心双畴传质的电特征

NSG2021 1st Conference on Hydrogeophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120017

L. Slater, F. Day‐Lewis, B. Parker

{"title":"Electrical Signatures of Dual Domain Mass Transfer Observed in Rock Cores","authors":"L. Slater, F. Day‐Lewis, B. Parker","doi":"10.3997/2214-4609.202120017","DOIUrl":"https://doi.org/10.3997/2214-4609.202120017","url":null,"abstract":"Summary Dual domain mass transfer (DDMT), or the transfer of solute between mobile and less-mobile porosity domains, can cause anomalous breakthrough behavior observed during pumping operations. One novel method for characterizing DDMT is through geoelectrical inference, whereby electrical geophysical measurements are combined with pore fluid specific conductance measurements during a tracer experiment. Studies have shown the effectiveness of this method for characterizing DDMT in unconsolidated materials. We describe first of a kind instrumentation and results aimed at investigating evidence for a geoelectrical signature of DDMT in a rock core. A flow through apparatus was designed with the capability to simultaneously acquire bulk conductivity and specific conductance measurements on fluids extracted from the center of the core. A tracer experiment was run in three phases: initial, tracer flush, and tracer injection. Both specific conductance and bulk conductivity time series exhibit characteristic breakthrough behavior, with a delayed breakthrough of bulk conductivity relative to specific conductance, indicative of DDMT in the core. A strong hysteresis loop in the plot of bulk conductivity versus specific conductance is observed, consistent with the electrical geophysical signature of DDMT. The occurrence of DDMT at the core-scale indicates that it is likely ubiquitous within porous media across multiple scales.","PeriodicalId":396561,"journal":{"name":"NSG2021 1st Conference on Hydrogeophysics","volume":"17 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":"127528987","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

Enhanced Geology of the Chalk Aquifer (Northern France) From Ert Imaging for Hydrogeological Purposes Ert成像用于水文地质目的的白垩含水层(法国北部)的增强地质

NSG2021 1st Conference on Hydrogeophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120063

A. Portal, L. Cary, R. Sylvain, B. Maurice, A. Bonnière, A. Bouvet-Swialkowski

引用次数: 0

Measuring Soil Moisture Using Surface-NMR With Prepolarization 用预极化表面核磁共振测量土壤水分

NSG2021 1st Conference on Hydrogeophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120016

T. Hiller, S. Costabel, R. Dlugosch, T. Radić, M. Müller‐Petke

引用次数: 0

Airborne geophysical survey for water resources planning, a case history, Bromölla, Southern Sweden 水资源规划的航空地球物理调查，一个案例历史，Bromölla，瑞典南部

NSG2021 1st Conference on Hydrogeophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120082

H. Jeppsson, B. Bergman, A. Edsen, J. Jensen, A. Johnsson, C. Brolin, P. Dahlqvist

引用次数: 0

Inversion of Hydraulic Conductivity from Induced Polarisation, Part A: Methodology and Verification 从诱导极化反演水力电导率，第一部分:方法和验证

NSG2021 1st Conference on Hydrogeophysics Pub Date : 1900-01-01 DOI: 10.3997/2214-4609.202120192

G. Fiandaca, L. M. Madsen, M. Olmo, L. Römhild, P. Maurya

引用次数: 1

Near surface electromagnetic survey to support the design of urban development plans - a case study 近地表电磁测量支持城市发展规划设计的案例研究

NSG2021 1st Conference on Hydrogeophysics Pub Date : 1900-01-01 DOI: 10.3997/2214-4609.202120231

P. Thomsen, M. Halkjær, C. Sorensen, A. Behroozmand

引用次数: 0