conductivity mapping Articles

  • A simple Cellular Automaton algorithm to optimise heat transfer in complex configurations

    The aim of this study is to propose a method for constructing a conductive paths topology in a 2D area-to-point and points-to-points problem. We focus here on heat conduction, with the goal of decreasing the temperature differences across a domain. We propose a method using a Cellular Automaton (CA) to reshape an initial topology by a thermal gradients attraction-repulsion mechanism. The ...


    By Inderscience Publishers

  • Case study of an evaluation of a Stacker Boom Luffing Pulley by Irwin's model and under BS 7910 guidance

    A case study on evaluation of a heavy–duty Stacker Boom Luffing Pulley was presented. Irwin's fracture toughness method and the British Standard were used to help in the decision–making process. Using inspection, discontinuities were found at the first look in the cylinder cross–section at the region of welding of the cylinder ends. A more detailed analysis was conducted by ultrasonic mapping, ...


    By Inderscience Publishers

  • Geophysical applications to solid waste analysis

    Abstract: Case studies of regional landfills show that electromagnetic geophysical methods can accurately and inexpensively define boundaries and thickness of waste. Degradation of putrescible solid waste generates conductive leachate that can be imaged with a frequency-domain terrain conductivity meter. Terrain conductivity measurements can be modified through a simple algorithm based upon ...


    By Geonics Limited

  • Electromagnetic (EMI) surveys

    EMI (EM-34) surveyDesigned and performed an EM-34 soil conductivity (soil mapping) survey of a 26-acre wood-waste landfill in Omak, Washington.  This soil mapping survey was designed to detect buried drums at a depth of 60 feet and was augmented by a total-field magnetometer survey. While employed with the Arkansas Department of Environmental Quality (ADEQ), performed approximately 40 ...


    By ECA Geophysics

  • Mapping sedimentation features in an alluvial valley

    Sediments of the Rhone river are characterized by strong heterogeneity between clay, sand and gravel units. To map these units, we employed an electromagnetic instrument (DualEM421). This instrument das the advantage that no contact to the ground is required and it can be carried on foot. With the interpreted data it was possible to map different geologic units to a depth of up to 4.5m. ...


    By Geo2X SA

  • ME70 Offshore Underwater Topography Survey of Zhuhai Delta Island - Case Study

    Background: Water around the offshore area of Zhuhai Delta island is very shallow where large ships are unable to access. It would take lots of time and effort if surveyed by traditional manned boats, and both the data quality and the safety of surveyors are not promising. Equipment: ME70 surveying and mapping USV Sounding ...


    By OceanAlpha Group Ltd.

  • Element-enrichment factors in Parmotrema bangii and Cryptomeria japonica of Portuguese islands of the central North Atlantic

    Owing to their abundance and ability to accumulate airborne elements, the epiphytic lichen Parmotrema bangii (Vain.) Hale and bark from its phorophyte, the Japanese cedar Cryptomeria japonica (L. fil.) D. Don, were chosen as atmospheric biomonitors and collected at five islands of the Azores archipelago, in the central North Atlantic - Sao Miguel and Santa Maria (eastern group); Terceira, Sao ...


    By Inderscience Publishers

  • Data Logger Requirements for Pharmaceutical Temperature Mapping

    The pharmaceutical industry is one of the most regulated industries in the world, so it’s no surprise that temperature mapping is imperative for temperature-controlled storage areas. Temperature mapping identifies hot and cold zones so necessary actions can be taken to equally distribute air, which in turn, will ensure the products’ integrity. FDA Under  ...


    By MadgeTech, Inc.

  • Use of geological mapping tools to improve the hydraulic performance of SuDS

    Most cities in Denmark are situated on low permeable clay rich deposits. These sediments are of glacial origin and range among the most heterogeneous, with hydraulic conductivities spanning several orders of magnitude. This heterogeneity has obvious consequences for the sizing of sustainable urban drainage systems (SuDS). We have tested methods to reveal geological heterogeneity at field scale ...


    By IWA Publishing

  • Disaster risk assessment management - implications to urban development and agriculture - experience from Kosovo

    The level of integration of DRAM into spatial planning is limited in Kosovo despite the fact that Kosovo has experienced several floods, earthquakes, landslides, and avalanches. The United Nations Human Settlements Programme (UN–HABITAT) through its Municipal Spatial Planning Support Programme (MuSPP) funded by Swedish Government (Sida) is supporting different partner municipalities towards ...


    By Inderscience Publishers

  • Potential-Field Methods

    Magnetic Surveys Designed and performed a total-field magnetometer survey of a 26-acre wood-waste landfill in Omak, Washington. This magnetic survey was designed to detect buried metallic debris to a depth of 12 feet and was augmented by an EM-34 soil conductivity (soil mapping) survey. Total Field Magnetic Survey - Omak, WashingtonDesigned and performed (utilizing a ...


    By ECA Geophysics

  • Massive building footprints data for TotalTopo

    In our work with the Department of Homeland Security and dbS SAR, Azimuth1 is designing and building search and rescue software for first responders. Part of that system is a custom topo map for SAR personnel to use to plan and carry out search tasks. Recently Microsoft open sourced a large data set of building footprints that they are providing as Open Data. ...


    By Azimuth1

  • Coreflex, Greenscapes provide worry-free plaza restoration Project - Case Study

    As the final step of a two year restoration project, the owners of Sandpiper Run needed the elevated and vegetated access to the beach and pool waterproofed. It was important to them that this access be ready for use by Memorial Day and they insisted on a short construction schedule. Challenge: A tight timeline, significant damage to the existing membrane and occupied space. ...


    By CETCO

  • DRASTIC assessment of groundwater vulnerability to pollution in the Vistula floodplain in central Poland

    Assessment of groundwater vulnerability to pollution was conducted by the DRASTIC method in central Poland, in the Vistula River valley. The results of this study have shown that 68.18% of the study area has a low pollution potential and 31.2% has a medium pollution potential. Single-parameter and map removal sensitivity analyses were conducted to evaluate the relative importance of the ...


    By IWA Publishing

  • Scanning for Leaks & Sinkhole Detection in a Retention Pond - Case Study

    In January 2015, one of our clients used AGI tools and software for leak and sinkhole detection in the liner of a retention pond in Tennessee. Process Our client’s customer had a retention pond that was designed to hold liquid, but it was leaking through a hole in the liner. The client used the ...


    By Advanced Geosciences, Inc.

  • Erosion index derived from terrain attributes using logistic regression and neural networks

    Maps identifying areas prone to channel erosion within agricultural fields could be useful for conservation planners. The objective of this study was to test an approach for creating such maps with logistic regression and neural networks. Survey grade elevation measurements were obtained from on a Central Kentucky farm. The elevation measurements were used to create 4 by 4-m digital elevation ...

  • Passive seismic horizontal to vertical spectral ratio (HVSR) surveying to help define bedrock depth, structure and layering in shallow coal basins

    Summary Trial passive seismic HVSR survey lines were carried out in the north-western part of the Wilga sedimentary basin in Western Australia, which is a small and shallow isolated sub-basin to the Perth Basin, sitting above rifted Archaean granite-gneiss basement rocks. The HVSR survey method was trialled to determine if it could resolve subsurface basin features quickly and cheaply. This ...


    By MoHo s.r.l.

  • Erosion index derived from terrain attributes using logistic regression and neural networks

    Maps identifying areas prone to channel erosion within agricultural fields could be useful for conservation planners. The objective of this study was to test an approach for creating such maps with logistic regression and neural networks. Survey grade elevation measurements were obtained from on a Central Kentucky farm. The elevation measurements were used to create 4 by 4-m digital elevation ...

  • Case Study - Lacustrine: Underwater Resistivity Surveys

    Lake Travis – Austin, Texas Objective:  Locate buried pipeline and map the limestone bedrock surface Site:  Lake Travis, near Austin, Texas USA during the AGI Marine Resistivity Seminar Date:  May 1, 2014 and May 7, 2015 Instrument:  SuperStingR8 WiFi, SwitchBox56, underwater marine cable with 28 electrodes spaced at 6m. ...


    By Advanced Geosciences, Inc.

  • Use of Electromagnetic Induction Tools in salinity assessment/appraisals in eastern Colorado

    Abstract Electromagnetic induction (EMI) is a relatively low-cost and rapid method for measuring, assessing spatially soil salinity. The two studies were conducted to evaluate data obtained with a single-frequency (EM38 meter) and multi-frequency (GEM300 sensor) EMI instruments and to relate apparent conductivity measured by these instruments with the more conventional conductivity of the ...


    By Geonics Limited

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