Moving Boundary Problems are Us The development and application of numerical methods for transport models towards an integrated frame-work for modeling earth surface dynamics from source to sink Voller, Paola, Mohrig, Parker Wolinsky, Jerolmack Kim, Qian, Sittoni Stefan, Swenson SA2Reconstructing delta dynamics from cores and other records SR2Determine how physical channel attributes affect nutrient & contaminant dynamics, productivity, and species diversity

Interactions Between Flow and Fan Topography Some JT Questions: How Does topography influence the flow over fans? Is there fan geometry that crates a bypassing condition ? Investigate by solving Exner + Shallow Water Eq Over Different Tops. FlatLong ComboTran. SA2Reconstructing delta dynamics from cores and other records

Transport exchange between a stream and its gravel bed is greatly enhanced by surface waves and/or bed forms. 2-D Advection Dispersion A Depth dependent dispersion can Be obtained from problem par. Hence an easy to use meaningful management tool Can be used to answer questions What restoration devices can be in place to create conditions to increase (dissolved oxygen for fish eggs) or decrease (organic carbon) exchange with the bed. Further work compare with Clark Stream-Lab exp. SR2Determine how physical channel attributes affect nutrient & contaminant dynamics, productivity, and species diversity Through Solution of a transient advection-dispersion can be shown that the laterally averaged concentration penetration CAN Be described by a 1-D Dispersion Equation y

Increasing Flexibility GRID---FIN-DIFF Efficient solution Ax=b — Difficult to Fit Geometry MESH---FEM Less Efficient solution Ax=b — Easy to Fit Geometry Difficult to adapt “CLOUD”---SPH Even Less Efficient solution Ax=b — Very Easy to Fit Geometry Easy to adapt Application of Meshless Methods