1 A way of looking at the world based on the processes involved, rather than starting with the object. ‘These phenomena include migration, erosion, urban sprawl, percolation, and development, which form the basis of a geographer’s education in processes as opposed to objects. Modelling such phenomena as a collection of objects that undergoes change upon a spatial plain ignores that change defines the process. An alternative basis for modelling spatio-temporal phenomena is proposed that involves developing a conceptual framework that takes change as its core, a framework defined by process’ (Femke Reitsma, Department of Geography University of Wisconsin, Milwaukee). This means that a process model is not based on a research question. Hollyer explains this approach very clearly at Geosoft.com.

2 A process-based software program model. Wergen et al. (2012) Geomorph. use a 3-D morphodynamic, process-based numerical model (Delft3D) to investigate the processes governing the evolution of major morphological features in alluvial estuaries as they evolve through the interaction between tidal movement, the available sediments, and the geometry of the tidal basin.

http://www.geosoft.com Geosoft website with Hollyer explanation of process model approach.

http://oss.deltares.nl Delft3D Open Source Community website will give all you need for fluvial, marine, and sedimentary processes.