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Jantiene Baartman defends her PhD thesis - May 9th 2012 PDF Print E-mail
Written by Erik van den Elsen   
ImageOn May 9th 2012, Jantiene Baartman will defend her PhD called 'Mind the gap: modelling event-based and millennial-scale landscape dynamics' in the Aula of the Wageningen University in the Netherlands.

Jantiene started her DESIRE work at the beginning of the project with the writing of a literature review in Working Block 1, called 'Desertification and land degradation: origins, processes and solutions'. After that, she started her research work that finishes now together with the end of the DESIRE project.

The PhD research describes the erosion/deposition dynamics on two different time scales. The abstract of her thesis can be found on the next page below (click 'Read more...').

defence: May 9th, 16:00, Aula, building 362, Gen. Foulkesweg 1, Wageningen.
promotors: prof. dr. ir. A. Veldkamp, prof. dr. C. Ritsema, co-promotor dr. J.M. Schoorl


 ‘Mind the gap: modelling event-based and millennial-scale landscape dynamics’

Abstract
This research looks at landscape dynamics – erosion and deposition – from two different perspectives: long-term landscape evolution over millennial timescales on the one hand and short-term event-based erosion and deposition at the other hand. For the first, landscape evolution models (LEMs) are often used, which describe landscape forming processes by geomorphic transport laws, usually on annual temporal resolutions. LEM LAPSUS is used in this research to evaluate the landscape dynamics in a study area in south-east Spain: the Guadalentín Basin. The model is calibrated on dated river terrace levels, which show an erosion – deposition – erosion sequence that the model could reproduce. Annual precipitation in this dryland area shows large inter-annual variability and erosion is supposed to be mainly the results of low-frequency, high magnitude rainfall events. Therefore, in this research, landscape dynamics are also assessed using the event-based erosion model OpenLISEM. Eventually, the role of extreme events in long-term landscape evolution are explored by comparing the two models and by incorporating annual rainfall variability into LEM LAPSUS. Another issue that is being addressed in this study is the relative influence of humans as compared to erosion as a natural process. A conceptual model, derived on the basis of dated sediment archives, is tentatively correlated to periods of human impact on the land. Using LAPSUS, the potential influence of historical tillage erosion is simulated, showing that the relatively slow process of tillage erosion added to floodplain aggradation over thousands of years.

Jantiene E.M. Baartman
9th May 2012
Wageningen University

The thesis of Jantiene Baartman can be downloaded by clicking HERE (PDF - 41Mb)
 
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