Dr. Jan Walstra has been with the Geological Survey of Belgium since 2011. He specialises in geological modelling and applications of remote sensing techniques in earth sciences, especially for mapping landscape changes and geohazards. In addition, Jan has expert knowledge of the Quaternary and Neogene geology of Belgium and the geological datasets held in the GSB archives.
Jan completed a master’s degree in Physical Geography at Utrecht University (NL, 2003) and obtained a PhD in Civil Engineering at Loughborough University (UK, 2006). His PhD research focused on the use of historical aerial photographs and digital photogrammetric techniques for assessing landslide dynamics.
At present, Jan is engaged in (hydro)geological modelling in the framework of the cross-border H3O-projects and the RESPONSE-project; he is also collaborating with an international team of archaeologists, reconstructing the paleo-environment of the ancient city of Charax Spasinou in the coastal plain of present-day Iraq. Jan supports and contributes to numerous other projects with his dedicated expertise in geology and mapping.
Quaternary & Neogene lithostratigraphy of Belgium, Lithofacies interpretation of borehole samples, outcrops & geophysical well logs, Geological mapping & 3D modelling, Geomorphological mapping, Geohazard risk assessment, Satellite image processing, Aerial photogrammetry, Radar interferometry, Geo-database management, Data quality control
Declercq, P-Y., Gérard, P., Pirard, E., Walstra, J. & Devleeschouwer, X., 2021. Long-Term Subsidence Monitoring of the Alluvial Plain of the Scheldt River in Antwerp (Belgium) Using Radar Interferometry. Remote Sensing 13 (6), 1160. https://doi.org/10.3390/rs13061160
Garrett, E., Fujiwara, O., Riedesel, S., Walstra, J., Deforce, K., Yokoyama, Y., Schmidt, S., Brückner, H., De Batist, M., Heyvaert, V. M. A. & the QuakeRecNankai Team, 2018. Historical Nankai-Suruga megathrust earthquakes recorded by tsunami and terrestrial mass movement deposits on the Shirasuka coastal lowlands, Shizuoka Prefecture. The Holocene 28, 1-16. https://doi.org/10.1177/0959683617752844
Heyvaert, V. M. A. & Walstra, J., 2016. The role of long-term human impact on avulsion and fan development. Earth Surface Processes and Landforms, 41(14), 2137-2152. https://doi.org/10.1002/esp.4011
Walstra, J., Heyvaert, V. M. A. & Verkinderen, P., 2011. Mapping Late Holocene landscape evolution and human impact – a case-study from Lower Khuzestan (SW Iran). In: Smith, M. J., Paron, P. & Griffith, J. S. (eds.) Geomorphological mapping: methods and applications. Elsevier, Amsterdam, the Netherlands: pp. 551-575. https://doi.org/10.1016/B978-0-444-53446-0.00022-7
Walstra, J., Chandler, J. H., Dixon, N. & Wackrow, R., 2010. Evaluation of the controls affecting the quality of spatial data derived from historical aerial photographs. Earth Surface Processes and Landforms, 36(7), 853-863. https://doi.org/10.1002/esp.2111
Walstra, J., Dixon, N. & Chandler, J. H., 2007. Historical aerial photographs for landslide assessment: two case histories. Quarterly Journal of Engineering Geology and Hydrogeology, 40, 315-332. https://doi.org/10.1144/1470-9236/07-011