movement of phosphate in a catchment with a shallow ephemeral water table

The variations of phosphate over a period of five years in drains of two paired catchments in the Karinga Downs, Western Australia, were compared with the variations calculated with a one-dimensional numerical model. The Karinga Downs catchments consist of sandy soils with a very low capacity to abs...

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Bibliographic Details
Published in:Journal of contaminant hydrology 1989-09, Vol.4 (4), p.313-331
Main Authors: Gerritse, R.G, Australia, Schofield, N.J
Format: Article
Language:English
Subjects:
Accuracy
Capacity
Catchments
Chlorides
Computer simulation
Dimensions
Drains
Earth sciences
Earth, ocean, space
Exact sciences and technology
fertilizer application
Fertilizing
Fluxes
high water tables
Hydrology
Hydrology. Hydrogeology
Mathematical models
Mineralogy
movement in soil
Phosphates
pollution
Sandy soils
Silicates
simulation models
Variations
Water tables
watersheds
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Summary:The variations of phosphate over a period of five years in drains of two paired catchments in the Karinga Downs, Western Australia, were compared with the variations calculated with a one-dimensional numerical model. The Karinga Downs catchments consist of sandy soils with a very low capacity to absorb phosphate. Hydrological data for the simulation model were obtained from analyses of runoff-rainfall relationships and chloride fluxes. Simulation results show that, even in sandy soils, substantial delays can occur in the response of a catchment to changes in phosphate input.
ISSN:0169-7722
1873-6009