My primary research interest is in sediment erosion, transport, and deposition in river, coastal, and wetland environments. Current research topics include storm-driven transport and the formation of sedimentary strata on the continental shelf, erosion and deposition on tidal salt marshes, flow-sediment-vegetation interactions in shallow coastal bays, mud dynamics in meso- and macro-tidal flats, wave-formed ripples, impact of climate change on barrier-bay-marsh morphology, and sediment associated contaminant transport.
My primary research interests are in the areas of (1) catchment hydrology, focusing on hydrological and geochemical transport processes, and (2) land-atmosphere interaction, including the exchange of water, energy, and gaseous compounds such as carbon dioxide, nitrous oxide, and methane between the terrestrial surface and the atmosphere. I seek to develop an integrated understanding of how the hydrological cycle, vegetation processes, and atmospheric dynamics are linked as well as how these connections are manifest in terms of nutrient cycling and ecosystem function.
My primary area of research is environmental fluid dynamics, with an emphasis on physical-biological interactions in coastal environments. Current research activities include the effects of flow and turbulence on nutrient exchange in coral reefs, sediment transport in estuaries, chemical dispersion in the coastal ocean, and wave dynamics. My research also investigates coastal resilience. I explore how ecosystems such as coral reefs, seagrasses and oyster beds, both alter and respond to wave and storm impacts along coastlines.
Active projects examine the microbial transformations of contaminants and trophic transfer of energy through microorganisms. A main line of inquiry deals with bacteria in the subsurfce (groundwater) environment. Current projects include field and laboratory investigations of hydrological factors controlling the transient removal of agricultural nitrate in sediments of low-relief coastal streams, and the role of autotrophic microbes in the dissolution of carbonates in submerged caves.
I am an eco-hydrologist with research spanning the continuum of natural through urban watersheds. A goal is to develop and incorporate principles learned in unmanaged ecosystems as part of urban ecosystem restoration. I have a major interest in the role of forests and tree canopy on flooding and drought, the provision of high-quality freshwater, coupled water, carbon and nitrogen cycling, and vulnerability to climate and land use change.