- Home
- Conferences
- Conference Proceedings
- Conferences
GRSG AGM 2012 - Monitoring and Managing the Earth's Resources
- Conference date: 11 Dec 2012 - 13 Dec 2012
- Location: London, UK
- Published: 12 November 2012
41 - 51 of 51 results
-
-
The application of ASTER remote sensing data to chromite bearing mineralized zones of Wadi Fizah ophiolite in Northern Oman
Authors A. Al-Abri, S. Rajendran, S. Al-Khirbash, B. Pracejus, S. Nasir, T.M. Kusky and A. GhulamWadi Fizah ophiolite in Oman has widespread ultramafic rocks, particularly in the basal dunite and harzburgite unit ofthe mantle section. This paper presents a research study to evaluate the discrimination and occurrence of chromites bearing mineralized zones within Oman ophiolites by analyzing the capabilities of Landsat TM and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) satellite data; using a number of selected methods including decorrelated stretching, different band rationing and Principal Component Analysis image processing techniques. The study results show that the processed VNIR and SWIR spectral wavelength regions are promising in detecting the areas of potential chromite bearing mineralized zones within the ophiolite region, and proved to be successful for mapping of serpentinized harzburgite containing chromites.
-
-
-
Application of SRTM-based geomorphometrics to characterize neotectonic deformation
Authors N. Argyriou and R. TeeuwThis study examines whether zones of neotectonic deformation can be highlighted by use of Digital Elevation Models (DEMs). Regions which are often hampered by dense vegetation, steep-sided high relief and rugged, poorly-accessible terrain are of prior interest in examining and understanding their neotectonic status.
-
-
-
Mobile dynamic applications for ground-based geomatics
More LessThe British Geological Survey (BGS) has been using mobile laser scanning techniques for a variety of geoscientific applications since 2000. This technology has become an established part of our research capability, and has been used on a variety of projects such as the monitoring of actively growing volcanic lava domes and rapidly retreating glaciers, coastal erosion and platform evolution, inland and coastal landslide modelling, mapping of geological structures and fault boundaries, rock stability and subsidence feature analysis, and geo-conservation. As a tool of modern geoscience it allows unprecedented resolution and accuracy.
-
-
-
Volcanic unrest in Kenya: a satellite perspective
Authors E. Robertson, J. Biggs, M. Edmonds and C. Vye-BrownThe East African Rift (EAR) system is a 5,000 km long series offault bounded depressions that run from the Red Sea to Mozambique. The use of InSAR throughout the East African Rift has led to the discovery that a number of volcanoes, which haven't erupted in human history, are actively deforming. In Kenya, the EAR hosts 14 Quaternary volcanoes that lie along its central rift axis. An initiallnSAR study, covering the period 1997-2008, discovered that four volcanoes underwent geodetic activity during this time.
-
-
-
Validation results of Satellite Derived Bathymetry (SOB) projects using WorldView-2 imagery - case studies
By D. CritchleySatellite Derived Bathymetry (SDB) is not a new concept and since the first remote sensing satellites have been orbiting the earth various techniques have been applied to try and accurately map the seabed. In the past few years the consortium of Proteus, EOMAP and DigitalGlobe has worked closely together to create a satellite derived bathymetric product that is reliable and accurate enough for most applications.
-
-
-
Hydrocarbon Exploration and Development in Kurdistan; Insights from Remote Sensing Data
Authors S. Selvaraj and M. HallEarth Observation technology is increasingly being used to assist hydrocarbon exploration in frontier areas. Satellite imagery datasets with a range of spectral and spatial specifications have a role to play in the regional assessment and appraisal of surface geological structure and stratigraphy. This is combined with the ability to generate high resolution and high accuracy Digital Elevation Models (DEMs) to assist in facility and infrastructure planning. The objective of this presentation is to review how this geological information, derived from remote sensing data, can contribute to onshore exploration and development, focusing on Kurdistan and the surrounding region. Regionally, these contributions include a greater understanding of the variation in tectonic characteristics and surface geology across the fold belt, together with the identification of previously unmapped structures using medium resolution satellite imagery. After regional appraisal, detailed block specific studies are undertaken utilising high resolution imagery. Although oil and gas exploration, appraisal and development has increased in Kurdistan over recent years it remains largely unexplored with no production until 2008 and is thought to contain many unmapped and undrilled structures.
-
-
-
Effective Atmospheric Modelling of Soufriere Hills Volcano, Montserrat for Space Geodesy
More LessTurbulent mixing processes around terrain cause local variations in water vapour from its vertically stratified profile. Temporal variations in water vapour distribution cause delays in phase used in the space geodetic InSAR techn ique. To correct for this accurate simulations of the 3D water vapour field at the times of radar acquisition are needed. On Montserrat this effect is compounded because Soufriere Hills Volcano is an active source of water vapour. High resolution terrain and landuse data sets are used to build a static model of Montserrat. The Weather Research and Forecasting model (WRF) is used to simulate the dynamics of the atmosphere over the island at a resolution of 250m. This simulation is nested through five steps from a Global Forecast System weather model (GFS) providing the initial conditions. This can be used to find the InSAR delay and hence correct for the true deformation of the volcano. It is anticipated that InSAR data provided by Sentinel 1 in 2013 will be used to test the method. The WRF model has been used so far to validate results against large precipitation events over Soufriere Hills such as that connected with the 2001 dome collapse and the 2011 tropical cyclone season.
-
-
-
Measuring dune velocity and sand flux with COSI-Corr
Authors P. Vermeesch and S. LeprinceRoads and pipelines in desert areas can be buried by migrating sand dunes. The cost of removing this sand is directly proportional to the sand flux ofthe moving dunes. Traditionally, sand flux measurements have been carried out by costly geodetic field surveys and/or long term monitoring of stakes set out in the (inter)dunes. We have developed an alternative approach for measuring sand flux from pairs of high resolution optical satellite images with a change detection algorithm called COSI-Corr. Using pairs of optical satellite images, we detected dune migration over time intervals of months to years. We then used the resulting displacement map to automatically distinguish dunes from interdunes. We interpolated a surface between the interdune areas and subtracted it from a digital elevation model, thus obtaining dune heights and volumes. Multiplying height with celerity yielded a pixel-by-pixel estimate ofthe sand flux, which was used to assess the annual volume of sand that needs to be removed from artifacts such as roads in dune areas.
-
-
-
The use of Satellite Remote Sensing for Offshore Environmental Benchmarking
By M. KingSatellite Remote Sensing is being increasingly utilised for environmental benchmark services in the offshore oil exploration industry. In recent years, tightening up of environmental legislation in response to major pollution events such as the BP Macondo Spill in July 2010, has resulted in operators becoming much more aware ofthe potential environmental impact oftheir operations.
-
-
-
Creating value from satellite imagery in the Oil & Gas industry
By I. MacInnesAs an owner and operator of one ofthe largest constellations of very high resolution, commercial, earth observation satellites, DigitalGlobe has become a major supplier of multispectral satellite imagery and related products to the Oil & Gas industry. While the industry is a large consumer of our products, increasingly the sector is sector is demanding services rather than products. This presentation will cover how DigitalGlobe is responding to the demands of the industry both from the perspective of satellite capabilities and value added services.
-
-
-
The use of remote sensing for mapping and assessing Terrain-related Geo-engineering issues
By A. Hart"The need to develop an early understanding of the impact of terrain-related issues to budget and schedule remains one of the greatest considerations for any ground excavation work, and in particular for pipeline construction projects" (Sweeney, et aI., 2004). The key terrain-related issues are the variability of the ground conditions, the availability of suitable construction materials or the presence of geohazards that could impact on the construction and/or operation of the infrastructure being considered. Cost-effective handling of these issues requires not only an ability to map the geology and geomorphology of a project area, but also being able to understand how these attributes influence and control the ground conditions and earth surface processes ofthe site, which for many long linear infrastructure projects can cover large areas, often in remote locations.
-