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Geohazard monitoring in southeast spain using integrated imagery and digital elevation model.

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Title: Geohazard monitoring in southeast spain using integrated imagery and digital elevation model.
Authors: Moore, J. McM.,
Mason, P.J.,
Davis, A.M.,
Eyers, R,
Liu, J.G.,
Item Type: Conference Paper
Abstract: The semi-arid terrain of South-eastern Spain is vulnerable to geohazards, including flash-flood erosion, landslides and seismic risk. Developing urbanisation, quarrying and mining, road building and changing agricultural practices are affected by geohazards and in some cases create them. For example, instability on new road cuts and embankments, and ploughing of natural, regolith-soil surfaces renders previously stable terrain vulnerable to ‘badland’ gully erosion, soil loss and causes increased reservoir siltation. This paper reports the results of a comparative study of the uses of Landsat TM, and SPOT Pan, in conjunction with a Digital Elevation Model (DEM) for geohazard identification and mapping. We have also investigated aspects of geohazards caused by changes in land use and infra-structure development since Landsat TM imagery became available in 1984. Study targets include:  terrain at risk from mass movement  ‘badland’ terrain in unconsolidated sediments  disturbance of land surfaces by agricultural development.  Expansion of communications infrastructure and quarrying in relation to natural hazards. The methodology for integrated hazard mapping involves directed enhancement, merging and draping of multi-spectral, and panchromatic imagery with the DEM to create three dimensional image products for mapping. The paper concludes with recommendations for combined image and DEM usage in geohazard assessment.
Issue Date: 1-Mar-1999
Date of Acceptance: 1-Mar-1999
URI: http://hdl.handle.net/10044/1/26792
Journal / Book Title: Proceedings of the Thirteenth Thematic Conference on Geologic Remote Sensing
Copyright Statement: © 1999 The Authors.
Conference Name: Thirteenth Thematic Conference on Geologic Remote Sensing
Start Date: 1999-03-01
Finish Date: 1999-03-03
Conference Place: Vancouver, BC, Canada
Appears in Collections:Earth Science and Engineering
Faculty of Engineering