News / Projects

Water Pollution from Agricultural Sources

Published on

Author:

Water pollution from agricultural sources, particularly Metaldehyde, is a key issue in the Loddon catchment, which is upstream of a number of Affinity Water’s surface water abstractions from the River Thames. Affinity Water commissioned ADAS to undertake desk-based and walkover surveys to improve knowledge of land use adjacent to the watercourse and to identify potential diffuse and point sources of pollution.

Water Pollution from Agricultural Sources

Information on the agronomists and contractors working in the catchment was collated and mapped, and farmers were asked a series of questions to verify metaldehyde and other oil seed rape herbicide use. Following desk studies and postal communication with landowners, ADAS produced an interactive PDF map (i-PDF) for each catchment, based on the refined surface water component of the UKWIR Intrinsic Pesticide Risk Map for metaldehyde and mobile pesticides. 

A wet weather walkover survey of 4,372 ha was carried out to identify land use adjacent to the watercourse and potential diffuse and point sources of pollution (‘hotspots’). Following the survey, 76 hotspots and 25 features were identified. Each hotspot was categorised for scale and severity of issue. Photographic evidence was also collected.

A GIS layer with colour coding by crop type, as well as locations of pollutant hotspots and ‘other features’, was produced based on the catchment walkover results. 

The aim was to increase Affinity Water’s understanding of the Loddon catchment through investigations of agricultural polluti on pathways, in order to support future catchment management activities and interventions. ADAS were able to identify potential agricultural pollution pathways and make recommendations for the future management of the Loddon catchment. 

On completion of the catchment understanding, it was recommended that further investigations at farm and field level would be required in order to fully understand metaldehyde and OSR herbicide use.

Number of views (358)

Categories: ADAS Digital, Water

Share this article:

Events

«January 2018»
MonTueWedThuFriSatSun
25262728293031
1234567
891011121314
15
15/01/2018 10:00 - 13:00

Successful Maize Growing – reducing the risk to water quality

Catchment Sensitive Farming and West Country Rivers Trust invite you to an agronomists, seedsmen...
Read more
16
16/01/2018 10:00 - 13:00

Getting the most from grass leys in your rotation

CSF invites you to FREE Workshops on: Getting the most from grass leys in your rotation
Read more
17
17/01/2018 13:00 - 16:00

Getting the most from grass leys in your rotation

CSF invites you to FREE Workshops on: Getting the most from grass leys in your rotation
Read more
18
18/01/2018 13:00 - 16:00

Getting the most from grass leys in your rotation

CSF invites you to FREE Workshops on: Getting the most from grass leys in your rotation
Read more
192021
2223
23/01/2018 09:30 - 13:00

Options for efficient sprayer filling & pesticide handling on farm

CSF invites you to FREE Workshops on options for efficient sprayer filling & pesticide...
Read more
24
24/01/2018 09:30 - 13:00

Options for efficient sprayer filling & pesticide handling on farm

CSF invites you to FREE Workshops on options for efficient sprayer filling & pesticide...
Read more
25262728
2930
30/01/2018 10:00 - 13:00

Getting the most from grass leys in your rotation

CSF invites you to FREE Workshops on: Getting the most from grass leys in your rotation
Read more
311
01/02/2018 10:00 - 13:00

Getting the most from grass leys in your rotation

CSF invites you to FREE Workshops on: Getting the most from grass leys in your rotation
Read more
2
02/02/2018 10:00 - 13:00

Getting the most from grass leys in your rotation

CSF invites you to FREE Workshops on: Getting the most from grass leys in your rotation
Read more
34
Skip to Main Content Skip to Search