Geohazard monitoring in southeast spain using integrated imagery and digital elevation model.
File(s)
Accepted version
Author(s)
Moore, J McM
Mason, PJ
Davis, AM
Eyers, R
Liu, JG
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.
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.
Date Issued
1999-03-01
Date Acceptance
1999-03-01
Citation
Proceedings of the Thirteenth Thematic Conference on Geologic Remote Sensing, 1999
Journal / Book Title
Proceedings of the Thirteenth Thematic Conference on Geologic Remote Sensing
Copyright Statement
© 1999 The Authors.
Source
Thirteenth Thematic Conference on Geologic Remote Sensing
Start Date
1999-03-01
Finish Date
1999-03-03
Coverage Spatial
Vancouver, BC, Canada