| Institution: | US Geological Survey (USGS) |
| Department: | Water Resources |
| Expertise: | Agricultural Runoff, Biogeochemistry, Nutrient Cycling, Nutrient Pollution, Water Quality |
| Chesapeake Management Areas: | Water Quality, Toxic Contaminants |
| Research interests: | Resolving sources, history, and fate of nitrogen in groundwater and streams; application of environmental tracers and isotopes to determine transport times and reaction rates of dissolved constituents; environmental isotope forensics; water quality effects of agriculture and wastewater disposal in different climatic and hydrogeologic settings. |
| Email: | jkbohlke@usgs.gov |
| Web Address: | www.usgs.gov/staff-profiles/john-karl-bohlke |
| Phone Number: | 703-648-6325 |
