http://www.ems-i.com/ GMS,SMS,WMS zhang cerl landsim nase ncgia curriculum http://www.crrel.usace.army.mil/ierd/hop1/riv.html cool animation of ice jam formation Burrough, P.A.. 1998. Dynamic Modelling and GIS, Chapter 9, In: P.Longley et al.(Eds) Geocomputation: a Primer. Wiley, pp165-192. Burrough, P.A., da Costa, J.R., Haurie, A., Fedra, K., Salvemini, M., & Hauska, H.(Banff 2000). MUTATE: a web-based distance learning programme for environmental modelling with GIS. (Banff 2000 - submitted). Recent research in the modelling of dynamic spatial processes has demonstrated the ability to model a wide range of dynamic geographical processes in a simple, yet satisfactory way. These methods are all based on developments from Map Algebra and Cellular automata (Burrough 1998, Longley et al 1998, van Deursen 1995, Takeyama and Couclelis 1997, Wesseling et al 1996 etc.) and involve computations based on a regular tesselation of the landscape that can be rapidly updated. In contrast to many other kinds of models using finite elements, models can be quickly computed using finite difference methods of calculation instead of the more laborious finite element solution of partial differential equations. These methods provide an easy to use generic environment for teaching and instruction of dynamic spatial processes in areas as disparate as ecological modelling, geomorphological developments, urban processes and epidemiology. What is also emerging is the development of sets of specialised, high-level programming languages based on GIS and geostatistical concepts that make these kinds of models easy to develop and modify in a learning environ Sluiter, R., Karssenberg, D, Burrough,P.A., Wesseling,C., de Jong, K., Van der Meer, M., van Steijn, H. & Jetten,V. (Banff 2000). GMOR: interactive computer models for teaching dynamic geomorphological processes. (Banff 2000 - submitted). C.G. Wesseling, D. Karssenberg, P.A. Burrough & W. van Deursen 1996, Integrating dynamic environmental models in GIS: the development of a Dynamic Modelling language. Transactions in GIS Vol 1: 40-48, 1996. http://mutate.chiron.pt/ Bernie Engel http://danpatch.ecn.purdue.edu/~sprawl/LTHIA/. Flanagan WEPP contains a climate generator, simulates surface and subsurface hydrology, irrigation, plant growth, residue decomposition, effects of tillage, soil detachment by raindrop impact and flowing water, sediment transport, and sediment deposition. The work describe here involves linkage of the WEPP model with the Arcvew GIS (software developed by Environmental Systems J Research Institute, Inc.) and TOPAZ (TOpographic PArameteriZation tool, also developed by the USDA-Agricultural Research Service). TOPAZ was used to delineate watersheds, locate channels, delineate hillslope profiles, and provide information on flow paths within the profiles. New techniques were developed and evaluated to determine representative slope profile inputs based upon the flow paths. ArcView was used to process and display the erosion model inputs and outputs.