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The occurrence of subsidence and collapse dolines in soluble carbonate rock is a frequent geotechnical hazard throughout the world. Such features pose serious geotechnical problems to engineering and building construction and also to public safety.
Detection methods utilized during preliminary site investigations range from direct methods, such as drilling, to indirect methods, such as ground geophysics and airborne remote sensing.
The aim of this paper is to examine the role of remote sensing in these preliminary site investigations. Previous and current remote sensing research concerned with the location of solution features is reviewed, with particular emphasis on airborne multispectral and thermal infrared line scanning. A comparative assessment of the relative merits of the different techniques is given, together with an examination of the factors which influence whether a particular technique will be successful.
The authors recommend that the most favorable detection results will be obtained if remote sensing methods are used under optimum environmental conditions and in appropriate geological conditions.
ground subsidence, ground collapse, soluble carbonate rock, solution features, geotechnical problems, detection, remote sensing, aerial photography, thermal infrared line scanning, multispectral scanner
Lecturer in engineering surveying, University of Surrey, Guildford, Surrey,
Senior engineering geologist, Applied Geology, Warwickshire,