Hydrologists measuring gradient self-potential, water temperature, specific conductance, and nitrate concentrations in the upper Delaware River between Hancock and Port Jervis, New York.

Photograph of hydrologists measuring gradient self-potential, water temperature, specific conductance, and nitrate concentrations were measured along a 123 km reach in the upper Delaware River between Hancock and Port Jervis, New York in summer 2021. Data collected during this campaign are available at: https://doi.org/10.5066/P9H652Z8