Hydrobiogeochemistry: The Transport and Fate of Constituents in the Subsurface.

The transport and fate of constituents (nutrients, contaminants, and other dissolved and suspended matter) in the subsurface environment is influenced by many physical, chemical, and biological processes. The terms used to describe the field have morphed over the years as our approaches, methods, and tools have become more sophisticated. Terms focused solely on chemical systems (such as Soil Chemistry and Chemical Hydrogeology) have been superseded progressively by Biogeochemistry and now Hydrobiogeochemistry. An overarching theme underlying this continued progression is integration, in both theory and application---  integration of disciplines (interdisciplinary, multidisciplinary), integration of approaches (theoretical, experimental, analytical), and integration of scales (spatial, temporal). Hydrobiogeochemistry has never been more relevant and more challenged as today, as we face critical issues related to for example water scarcity and availability of clean water, food security, impacts of energy development, production and storage, and human interactions with ecosystem services. This presentation will illustrate selected examples of multi-scale research efforts designed to provide integrated assessments of contaminant transport and remediation.