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.Abstract
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.
| Item Type: | Article |
|---|---|
| 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 |
| Subjects: | UNSPECIFIED |
| Departments: | Faculty of Science and Technology > Lancaster Environment Centre |
| ID Code: | 49705 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 13 Sep 2011 14:00 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 19:31 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/49705 |
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