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Relating phosphorus uptake to changes in transient storage and streambed sediment characteristics in headwater tributaries of Valley Creek, an urbanizing watershed
Journal article   Peer reviewed

Relating phosphorus uptake to changes in transient storage and streambed sediment characteristics in headwater tributaries of Valley Creek, an urbanizing watershed

Robert J. Ryan, Aaron I. Packman and Susan S. Kilham
Journal of hydrology (Amsterdam), v 336(3-4), pp 444-457
07 Apr 2007
DOI: https://doi.org/10.1016/j.jhydrol.2007.01.021
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

fluvial environment General geochemistry geochemistry hydrochemistry Hydrogeology hydrology Pennsylvania phosphorus recreation rivers and streams sediments southeastern Pennsylvania stream sediments tributaries United States urbanization Valley Creek water quality watersheds
Phosphorus uptake dynamics were examined in two small streams in the Valley Creek watershed, located in an urbanizing area approximately 30km west of Philadelphia, Pennsylvania, USA. The goal of this research was to examine how phosphorus uptake is influenced by temporal changes in bed sediment characteristics and transient storage in streams within an urbanizing watershed. We conducted tracer studies with a conservative solute, observed phosphorus uptake in situ and in laboratory experiments, and measured fine bed sediment grain size distributions and chemical compositions at both sites. At the Morehall Rd. site, the total laboratory and in situ uptake rates were related to the silt-clay (d<50mu m) content of the fine (d<2mm) bed sediment and the sediment phosphorus concentration. The in situ uptake rate was also related to the sediment magnesium content and the transient storage exchange rate and area. At the Sheldrake Rd. site, the phosphorus uptake rates observed in situ and in the laboratory were not significantly related to any of the measured stream or sediment characteristics. However, the areal average uptake (uptake flux), was related to the transient storage exchange rate. In addition, the abiotic contribution to in situ uptake was evaluated by comparing the in situ and laboratory measured uptake rates. The total abiotic in situ uptake rate was found to be related to the bed sediment silt-clay content and the transient storage residence time, while the abiotic uptake flux was related to the transient storage residence time. Overall, these urbanizing streams were less efficient at removing phosphorus from the water column than forested streams in non-urban settings. Abstract Copyright (2007) Elsevier, B.V.

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Collaboration types
Domestic collaboration
Web of Science research areas
Engineering, Civil
Geosciences, Multidisciplinary
Water Resources
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