A Survey of Sheep-Dipping Practices in the River Tweed Catchment
Version of Record online: 26 JUL 2007
Water and Environment Journal
Volume 7, Issue 4, pages 395–403, August 1993
How to Cite
VIRTUE, W. A. and CHURCH, A. M. (1993), A Survey of Sheep-Dipping Practices in the River Tweed Catchment. Water and Environment Journal, 7: 395–403. doi: 10.1111/j.1747-6593.1993.tb00861.x
- Issue online: 26 JUL 2007
- Version of Record online: 26 JUL 2007
- risk assessment;
- sheep dip;
- sheep dipper;
Following an initial exploratory survey in 1989, a detailed survey was carried out in 1990–91, the results of which indicated that a significant number of sheep dippers in the River Tweed catchment were at risk of polluting adjacent watercourses. Those dippers identified as medium to high risk of causing pollution were re-inspected in 1992 as a follow-up to the previous survey and, although in many cases dipping practices had greatly improved, a number were still at risk – emphasizing the importance of continued monitoring.
To complement the survey, environmental samples were taken and, in most of the catchments, the dip-active ingredients diazinon and propetamphos were found, confirming that the leaching of dip into a watercourse was occurring over a wide area throughout the Tweed catchment. The analysis of the environmental samples taken during the main dipping period each year of the survey showed that, in general, there was a significant decrease in diazinon and propetamphos in 1991 and 1992, compared to previous years.