We have been comparing turbidity patterns upstream and downstream of a WWTP on the Wissahickon. The two sites have very different grain size and one site is highly embedded while the other is not at all embedded. Despite these differences the turbidity pattern during storms is quite similar at both sites, suggesting an upstream rather than local control. The nutrient patterns are also similar (albeit with differing concentration) despite the WWTP input. Grad student Chelsea Kanaley will be presenting results at the upcoming GSA annual meeting.