Category Archives: Uncategorized

Two of the students in our group presented at the regional NE-SE GSA meeting.  Undergrad Emilie Tannert-Schmidt presented data on dust collectors along an urban gradient. Grad student Ashleigh Kirker presented data from her third paper modeling effectivenees of stormwater … Continue reading →

I met with Swiss karst researchers this month and learned about how they use tracers to evaluate karst vulnerability and how the geology is used to identify capture areas. This photo from the geosciences department at University of Neuchatel is … Continue reading →

Two new publications were recently accepted working with external collaborators: Quantifying stream-loss recovery in a spring using dual-tracer injections in the Snake Creek Drainage, Great Basin National Park, Nevada, USA by  C. Eric Humphrey*, Philip M. Gardner, Lawrence E. Spangler, … Continue reading →

Field work continues in the winter.  I installed conductivity loggers in several tributaries to see if we can identify sources of road salt. This logger (see stake) is in Sandy Run tributary, just upstream of the USGS gage in Pennypack … Continue reading →

I just finished a hike from rim to rim across the Grand Canyon.  It was amazing.  In this post I am including photos of the springs we passed along the way (but the geology was amazing too). Roaring Spring is … Continue reading →

I gave a presentation at the Villanova Stormwater Conference in October about the benefits of long term monitoring on the I-95 stormwater basins.  I was joined in the panel discussion by Dr. Robert Traver of Villanova and Edwina Lam and … Continue reading →

Two publications were accepted over the past month and a half: Pope, G.G., Nyquist, J.E., and Toran, L. 2022. Time lapse resistivity monitoring of a simulated runoff test in a bioswale located in Philadelphia, PA.  Journal of Sustainable Water in … Continue reading →

Dr. Jon Nyquist and I performed an electrical resistivity survey along one of the stormwater basins next to I-95 to direct infiltration measurements in heterogeneous urban soil. We identified an extensive clay layer (blue regions) with a few pockets of … Continue reading →

Ashleigh and I preformed a follow up LiDAR survey at Roychester Park this month. The previous survey was conducted before the stormwater control measures were installed, thanks to former student Liz Cushman and Dr. Jon Nyquist. We performed the follow … Continue reading →

The dust collector we installed at Pennypack Ecological Restoration Trust on Pennypack Creek had an interruption in sampling while they drilled geothermal wells onsite. That wasn’t the ambient dust we were trying to collect! We put the dust collector back … Continue reading →