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Hydrogeology, including pore water flow in northern peatlands, heat transport, heat as a tracer of natural systems, groundwater modeling, coupled numerical models of pore water flow and heat transport with freeze/thaw processes, and the impact of melting tropical glaciers on water resources.聽My research focus is water resources and answering questions about what processes control the source and quality of groundwater. My research program involves many scientific tools such as field measurements, water chemistry, and computer models to understand hydrologic systems around the world, in such places as Ethiopia, Peru, Indonesia, the United States, and Canada. Not only am I interested in water as a resource, but in understanding the connection of these hydrologic systems with ongoing global climate change and geology. My motivating factor in all of these projects is to help people and society in understanding the processes that control and affect water.聽