Heathwaite, A. L. and Dils, R. M. (2000) Characterising phosphorus loss in surface and subsurface hydrological pathways. Science of the Total Environment, 251-25 (1). pp. 523-538.Full text not available from this repository.
The magnitude and composition of the phosphorus (P) load transported in surface and subsurface hydrological pathways from a grassland catchment depends on the discharge capacity of the flow route and the frequency with which the pathway operates. Surface runoff is an important pathway for P loss, but this pathway is spatially limited and temporarily confined to high magnitude, high intensity rainfall events. High P concentrations (mean: 1.1 mg TP l−1) were recorded, with most P transported in the dissolved fraction. Preferential flow pathways, particularly soil macropores and field drains, are important contributors to the overall P load; most P is transported in the particulate fraction and associated with organic or colloidal P forms. High P concentrations (mean: 1.2 mg TP l−1) were recorded in macropore flow in the upper 0–15 cm of a grassland soil, and generally declined with increasing soil depth. On average, P concentrations in drainflow were over six times greater in stormflow compared to baseflow. Stormflow P losses in drainflow were predominantly in the particulate fraction; significant correlation (P<0.01) was recorded with suspended sediment concentrations in drainflow. Phosphorus concentrations in groundwater were low (<0.2 mg TP l−1 at 150 cm), although this pathway may contribute to stream flow for the majority of the year.
|Journal or Publication Title:||Science of the Total Environment|
|Additional Information:||5 May 2000 Characterising phosphorus loss in surface and subsurface hydrological pathways 83 cites: http://scholar.google.com/scholar?num=100&hl=en&lr=&cites=11117765911240498587|
|Uncontrolled Keywords:||Non-point source pollution ; Phosphorus ; Surface runoff ; Drainflow ; Groundwater ; Macropores ; Grassland ; Agriculture|
|Departments:||Faculty of Science and Technology > Lancaster Environment Centre|
|Deposited On:||13 Sep 2011 14:00|
|Last Modified:||26 Jul 2012 19:31|
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