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Further analysis of water bodies adjacent to major crop types - PS2332

Description
Aquatic risk assessment for pesticides is based on standardised, protective assumptions about the kinds of water body that are adjacent to treated crop areas. These assumptions have been formalised within the FOCUS surface water scenarios framework which forms the basis for aquatic exposure assessment for European registration. Assumptions are made about the dimensions of the water column (width and depth), distance from crop to water and the absence of vegetation on the margin between.

Risk may be considerably modified when actual properties of water bodies are taken into consideration. Analyses undertaken as components of Defra projects PN0941 and PS2304 have begun to populate higher tier assessments in the UK with measured data. These have shown, for example, that some water bodies adjacent to agriculture are smaller than assumed by FOCUS, but that most are more remote from sprayed areas and/or are partially protected by bankside vegetation.

Data for three landscapes (clays, eutrophic tills and oligotrophic tills) have been implemented into a probabilistic calculation of exposure via spray drift within open-access, web-enabled software to support ecological risk assessment (WEBFRAM; www.webfram.com). However, the calculations are restricted to arable crops and do not account for the fenland landscape which is intensively used for agriculture and is particularly significant for potatoes, sugar beet and vegetables.

The overall aim of the proposed research is to build on existing databases/analyses to deliver knowledge on the properties of ditches/small streams in (1) the fenland landscape and (2) adjacent to orchards. The work will deliver standalone datasets that will support risk assessment and data will also be implemented into the spray drift calculation within WEBFRAM. The specific objectives are to:

1. Undertake field visits to measure dimensions of ditches/small streams in three landscapes;

2. Expand an existing analysis of proximity of water to include distance from arable crop to water in the fenland landscape;

3. Implement the fenland landscape for arable crops and spray drift from orchards into the WEBFRAM software.
Objective
Undertake field visits to measure dimensions of ditches/small streams in three landscapes;
2. Expand an existing analysis of proximity of water to include distance from arable crop to water in the fenland landscape;
3. Implement the fenland landscape for arable crops and spray drift from orchards into the WEBFRAM software.
Project Documents
• Final Report : Further analysis of water bodies adjacent to major crop types   (4424k)
Time-Scale and Cost
From: 2007

To: 2007

Cost: £35,505
Contractor / Funded Organisations
University - York
Keywords
Agricultural Land              
Application              
Biodiversity              
Decision Support Tools              
Ditches              
Environment              
Environmental Protection              
Field Measurements              
Habitats              
Land              
Modelling              
Pesticides              
Water              
Fields of Study
Pesticide Safety