I joined the University of Waterloo as the Canada Excellence Research Chair in Ecohydrology in 2011. Previously, I was a Professor at the Georgia Institute of Technology and at Utrecht University. My research combines laboratory studies with field observations and theoretical developments to understand and model the processes that regulate water chemistry, carbon and nutrient cycling, microbial activity, and mineral transformations – in agricultural and urban landscapes, lentic and lotic systems, and coastal marine environments. My work further includes the detection and environmental fate and transport of trace contaminants (metals, metalloids, hydrocarbons, microplastics, nanomaterials), the calibration of geochemical (paleo)proxies, and the development of new water quality sensors. I also uses remote sensing data time series and regional climate projections to forecast future changes in lake and soil biogeochemistry