Estimating Unsaturated Zone N Fluxes and Travel Times to Groundwater at Watershed Scales

Lixia Liao1,2, Christopher T Green3, Thomas Harter2, Bernard T Nolan4, Paul F Juckem5 and Christopher L Shope6, (1)US Geological Survey, Menlo Park, CA, United States, (2)University of California, Davis, CA, United States, (3)USGS, Integrated Modeling Prediction Division, Moffett Field, California, United States, (4)US Geological Survey, Reston, VA, United States, (5)US Geological Survey, Madison, United States, (6)USGS, Baltimore, MD, United States