Digital terrain models and mathematical modelling of debris flows
نویسندگان
چکیده
منابع مشابه
Modelling debris flows down general channels
This paper is an extension of the single-phase cohesionless dry granular avalanche model over curved and twisted channels proposed by Pudasaini and Hutter (2003). It is a generalisation of the Savage and Hutter (1989, 1991) equations based on simple channel topography to a twophase fluid-solid mixture of debris material. Important terms emerging from the correct treatment of the kinematic and d...
متن کاملDigital terrain modelling for exploration and mining
Models of ground surface elevation, slope, aspect, curvature, roughness, deformation, as well as other features are gathered together in the term Digital Terrain Model (DTM). DTMs can be generated from a wide range of technologies such as ground surveying, aerial and satellite imagery, including both active and passive sensors. Some elevationderived parameters, such as roughness and slope can b...
متن کاملOn the evaluation of debris flows dynamics by means of mathematical models
The prediction of debris flow dynamic characteristics in a debris flow prone torrent is generally made through the investigation of past events. This investigation can be carried out through a survey of the marks left by past debris flows along the channel and through a detailed analysis of the type and shape of the deposits found on the debris fan. The rheological behaviour of future debris fl...
متن کاملOptimum Sampling for Digital Terrain Modelling
The investigation addresses three main issues: The first concerns a study of the terrain relief classification for the purpose of composite sampling. The second issue concerns quality assessment models that are used to assess the quality of representa~ion pf ideal geometric primitives and of real terrain relief representation. The third issue concerns the performance of composite sampling when ...
متن کاملAutomated Quality Control of Digital Terrain Models
The paper demonstrates modified cross-correlation methods to detect height errors of DTM points based on stereo-pairs of aerial images. The usual cross-correlation method is extended using dynamic dimensioning and different structures of the correlation matrix. Also a texture coefficient is introduced which makes the auto-correlation procedure more robust. All together seven different image mat...
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ژورنال
عنوان ژورنال: Geodetski vestnik
سال: 2012
ISSN: 0351-0271
DOI: 10.15292/geodetski-vestnik.2012.04.826-837