Dry deposition and spray drift of pesticides to nearby water bodies

Colophon

Title:
Dry deposition and spray drift of pesticides to nearby water bodies

Abstract:
During field application of pesticides, some of it will reach adjacent water bodies through atmospheric dry deposition and spray drift A model was developed to calculate the volatilisation, atmospheric transport and dry deposition of pesticides to water bodies (streams, ditches and lakes) caused by application on nearby fields. It appears that the contribution of dry deposition of those pesticides, that are highly volatile as well as highly soluble, to water bodies is of the same order or even larger than the contribution from spray drift. Spray drift is only important over a relatively short distance (less than 30 m) from the edge of a field, whereas dry deposition can also be important further away. The model, that includes a description of spray drift, is built in into an integrated model used for estimating the risk of transport of pesticides to water bodies. This integrated model describes not only the atmospheric contribution to water bodies, but also the contribution via other pathways.

Abstract in Danish:
Når pesticider udsprøjtes på en mark transporteres en del via atmosfæren til nærliggende vandløb og søer En model blev udformet, som beskriver fordampning, atmosfærisk transport og tørdeposition af pesticider til vandløb og søer. Modelberegninger viser at tørdepositionen er af samme størrelsesorden, eller endda større end afdriften. Afdriften foregår i kort afstand (mindre end 30 m) fra markkanten, mens tørdeposition kan foregå over større afstande. Den udviklede model er sammen med en beskrivelse af afdrift bygget ind i en integreret model til vurdering af risikoen for transport af pesticider til vandløb og søer. I denne integrerede model indgår også andre transportveje til vand.

Series title and no.:
Pesticides Research, 66

Publisher:
Miljøstyrelsen

Performing organization(s):
National Environmental Research Institute; Danish Institute of
Agricultural Sciences

Author:
Asman; Willem; Jørgensen, Andreas; Jensen, Peter Kryger

Language:
eng

URL:
http://www.mst.dk/udgiv/Publications/2003/87-7972-945-2/html/

ISBN:
87-7972-946-0

Digital ISBN:
87-7972-945-2

Version/edition:
26-08-2003

Data formats:
html,htm,jpg,gif,pdf,css,js

Publisher category:
statslig

Key subjects:
pesticides; watercources; lakes; atmosphere

Copyright:
Miljøstyrelsen