Skip to main content


Title: River Wylye : analysis and modelling of phosphates
Author: Celia Bartlett
Author: Neil Murdoch
Document Type: Monograph
Annotation: EA additional title info: May 1998
This report was written as part of an ongoing study of the Upper Hampshire Avon catchment initiated in response to concerns raised by English Nature about the levels of phosphates in this area. Statutory requirements which may enable the Agency to control phosphate levels are the Urban Waste Water Treatment Directive and the Habitats Directive. The UWWTD can be used to force nutrient stripping at PLC STW discharges if appropriate qualifying conditions are met. The Habitats Directive has been recently introduced and is designed to protect flora and fauna in designated areas. This report is concerned with the River Wylye from its source near Kingston Deverill south of Warminster to its confluence with the Nadder at Wilton. It is known, in general terms, that diffuse and point sources contribute to phosphate levels in the river. Diffuse sources arise from runoff from agricultural land. A rule of thumb appears to be that about 1 % of phosphates put onto the land will find its way into the river. Point sources may be large or small; the large ones being the PLC STWs. The purpose of this report is to examine in some detail the point source contributions to phosphate levels in the Wylye. The intention is to provide information on which decisions about management of the catchment may be based, but not to make those decisions.
Publisher: Environment Agency
Publication Date: 1998
Publication Place: Exeter
Subject Keywords: Catchment managementPhosphatesPollutants
Geographic Keywords: EA South WestHampshire Avon catchmentWylye
Extent: 26
Total file downloads: 296

Download PDF    Display PDF in separate tab