Temporal variability in phosphorus transfers: classifying concentration?discharge event dynamics
| Autor: | Philip Haygarth, Turner, B., Fraser, A., Jarvis, S., Harrod, T., Nash, D., Halliwell, D., Trevor Page, Keith Beven |
|---|---|
| Přispěvatelé: | EGU, Publication, Institute of Grassland and Environmental Research, North Wyke Research Station, Soil and Water Science Department, University of Florida [Gainesville] (UF), National Soil Resources Institute, Agriculture Victoria (AgriBio), Department of Environmental Science [Lancaster], Lancaster University |
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere [SDU.OCEAN] Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU] Sciences of the Universe [physics]/Earth Sciences [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces environment |
| Zdroj: | Hydrology and Earth System Sciences Discussions Hydrology and Earth System Sciences Discussions, European Geosciences Union, 2004, 8 (1), pp.88-97 ResearcherID Lancaster University-Pure |
| ISSN: | 1812-2108 1812-2116 |
| Popis: | International audience; The importance of temporal variability in relationships between phosphorus (P) concentration (Cp) and discharge (Q) is linked to a simple means of classifying the circumstances of Cp?Q relationships in terms of functional types of response. New experimental data at the upstream interface of grassland soil and catchment systems at a range of scales (lysimeters to headwaters) in England and Australia are used to demonstrate the potential of such an approach. Three types of event are defined as Types 1?3, depending on whether the relative change in Q exceeds the relative change in Cp (Type 1), whether Cp and Q are positively inter-related (Type 2) and whether Cp varies yet Q is unchanged (Type 3). The classification helps to characterise circumstances that can be explained mechanistically in relation to (i) the scale of the study (with a tendency towards Type 1 in small scale lysimeters), (ii) the form of P with a tendency for Type 1 for soluble (i.e., p?Q relationships that can be developed further to contribute to future models of P transfer and delivery from slope to stream. Studies that evaluate the temporal dynamics of the transfer of P are currently grossly under-represented in comparison with models based on static/spatial factors. Keywords: phosphorus, concentration, discharge, lysimeters, temporal dynamics, overland flow |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|