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Methods and Results

Background

Traditional methods for the monitoring of land surface morphology such as field investigations are cost-intensive, time consuming and limited regarding spatial and temporal coverage. Nowadays, the increasing availability of remote sensing data allows for the comprehensive mapping of geomorphological features and for the continuous monitoring of surface morphology changes at high spatial and temporal resolutions.

Overall objective

Within MORPH, novel methods for mapping, monitoring and modelling spatio-temporal dynamics of surface morphology, focusing on the investigation of landslides and volcanic deposits, are developed by an integrated analysis of optical and radar remote sensing data. To gain added value from the analysis of different remote sensing data, a digital data model that allows for the integration of data/analysis results at multiple scales will be implemented for spatio-temporal modelling of land surface trends and dynamics.

Study sites

The methodology is developed for two study areas in Iceland (Öræfajökull and Hekla) which are highly dynamic in their geomorphic evolution and are characterised by progressive mass displacements and surface deformation.

Methodology

The project addresses the following main tasks:
• The development of an object-based image analysis (OBIA) method for the multi-scale mapping of slope instabilities and volcanic deposits that is transferable across sensors
• The set-up of automated methods for time series analysis for monitoring spatio-temporal changes including the measurement of surface displacements and deformation using SAR interferometry
• The integration of InSAR results with extracted polygonal structures derived by OBIA
• The implementation of a flexible digital data model for spatio-temporal modelling of land surface trends and dynamics
• The iterative validation of analysis routines and results

Results

From mapping to monitoring to modelling – the concept of MORPH, allows for the provision of results with high information content. Existing mapping approaches can be complemented, and new insights on spatio-temporal changes will be achieved. Furthermore, monitoring surface changes can contribute to a better understanding of mass-transport systems, to detect related environmental variability and to assess natural hazards.