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This study, conducted over 10 weeks by an undergraduate student in an NSF REU (U.S. National Science Foundation Research Experiences for Undergraduates) program under mentorship of the co-authors, investigates responses of a small urban watershed, located in Blacksburg, Virginia, to acute toxicity events. High-frequency water and weather data were collected using monitoring equipment maintained by the Learning Enhanced Watershed Assessment System (LEWAS) lab, including a weather station, rain gauge, water quality sonde, and an Acoustic Doppler Current Profiler. The location and attributes of local stormwater catchments were surveyed and recorded using GIS software to determine the overall contributing area of the LEWAS lab watershed. This fieldwork resulted in the construction of an accurate stormwater network map, which in turn allowed the identification of sources of sedimentation and other pollution from runoff events. A case study presents the response of the watershed to a winter storm event that resulted in acute chloride toxicity from runoff containing road salts.

Investigating the Response of a Small Urbanized Watershed to Acute Toxicity Events via Analysis of High-frequency Environmental Data