PhD Candidate in Civil and Environmental Engineering
Stanford University Email Twitter Bluesky Google Scholar LinkedIn ResearchGate ORCID
Subcritical flows have the ability to influence sediment erodibility, even if the grains themselves are not mobile. Here, we examine how the history of directional flows over a granular bed impacts the critical stress for sediment motion. [click to read more]
The White Clay Creek, located in southeastern Pennsylvania, is a gravel-bed river with banks that consist of cohesive sediment, bedrock, and colluvium. This watershed also has a long history of human impacts, such as the construction of mill dams. Results from monitoring coarse sediment transport and numerical modeling of our study site lead us to use the term 'semi-alluvial' to describe this river system. [click to read more]
River rocks become rounded into smooth pebbles when transported as bedload, but other rocks become rough and angular when transported by landslides or rock falls. In this study, we attempt to experimentally delineate the transition between low-energy chipping and high-energy fragmentation. By repeatedly dropping concrete particles of varying strength, we are able to observe both breakdown mechanisms and validate a previously proposed probabilistic model for impact attrition. [click to read more]