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Research Goals and Projects

Arctic river response to warming

River deltas and sea level rise

Rivers on Mars

The Caltech Surface Processes Group seeks to understand the evolution of landscapes and sedimentary deposits on Earth and other planets through the mechanics of erosion, sediment transport and deposition.  Earth surface dynamics are multiscale with important processes ranging from sand transport by turbulence to feedbacks between mountain building and erosion.  We attempt to bridge these scales using a range of tools including field measurements and remote sensing of active processes, topographic analysis and dating to constrain landform kinematics, and flume experiments, numerical modeling and theory.  In addition to developing and testing new theories for landscape mechanics, we apply these models to ancient landforms and sedimentary deposits on Earth and other planets to extract quantitative information about paleo-environmental history.  Our work has applications ranging from river restoration and debris-flow hazards, to analyzing petroleum reservoirs in ancient sedimentary deposits, extracting paleo-climate information from landscape topography, and reconstructing flood discharges on the surface of Mars.  

Active research questions include: Will river deltas and coastal landscapes drown due to sea level rise? How will Arctic rivers respond to permafrost thaw?  When and where did water flow across the surface of Mars? 

Former Research Projects

Bedrock canyon formation

Continental shelf sediment transport

Debris flows

Geomorphology of Mars and Titan

Geomorphology of mountain streams

Hillslope geomorphology

Landscapes of the Ancient Earth

Submarine geomorphology