Pesticides Research, 64 – Technical Documentation of PestSurf, a Model describing Fate and Transport of Pesticides in Surface Water for Danish Conditions

Technical Documentation of PestSurf, a Model describing Fate and Transport of Pesticides in Surface Water for Danish Conditions

Preface

The project "Model Based Tool for Evaluation of Exposure and Effects of Pesticides in Surface Water", funded by the Danish Environmental Protection Agency (DEPA), was initiated in 1998. The aim of the project was:

To develop a model-based tool (PestSurf) for evaluation of risk related to pesticide exposure of surface water. The tool must be directly applicable by the Danish Environmental Protection Agency in their approval pr°Cedure. As part of this goal, the project had to:

Develop guidelines for evaluation of meSocosm experiments based on a system-level perspective of the fresh water environment
To develop models for deposition of pesticides on vegetation and soil.
To estimate the deposition of pesticides from the air to the aquatic environment.

The project, called "Pesticides in Surface Water", consisted of seven subprojects with individual objectives. The sub-projects are listed in Table 1.

Table i Sub-projects of "Pesticides in Surface Water"

Tabel i Oversigt over delprojekter i "Pesticider i overfladevand"

	Title	Participating institutions
A	Development and validation of a model for evaluation of pesticide exposure	DHI Water & Environment (DHI)
B	Investigation of the importance of plant cover for the deposition of pesticides on soil	Danish Institute of Agricultural Sciences (DIAS)
C	Estimation of the airborne transport of pesticides to surface water by dry deposition and spray drift	National Environmental Research Institute (NERI) Danish Institute of Agricultural Sciences (DIAS)
D	Facilitated transport	DHI Water & Environment
E	Development of an operational and validated model for pesticide transport and fate in surface water	DHI Water & Environment National Environmental Research Institute
F	MeSocosm	DHI Water & Environment National Environmental Research Institute (NERI)
G	Importance of different transport routes in relation to occurrence and effects of pesticides in streams	National Environmental Research Institute (NERI) County of Funen County of Northern Jutland

Figure 1 Links between the different sub-projects. The sub-projects are placed on a cross-section of the catchment to illustrate interactions

Figure 1 Links between the different sub-projects. The sub-projects are placed on a cross-section of the catchment to illustrate interactions
Figur 1 Sammenhæng mellem delprojekterne. Delprojekterne er placeret på et tværsnit af en opland for at illustrere interaktionerne

Figure 1 describes the relationship between the sub-projects. Sub-project 1 models the upland part of the catchment, while sub-project 5 models surface water bodies. Sub-project 8 delivers data to both modelling projects. Sub-project 2 and 3 develop process descriptions for spray drift, dry deposition and deposition on soils. Sub-project 4 builds and tests a module for calculation of colloid transport of pesticide in soil. The module is an integrated part of the upland model. Sub-project 6 has mainly concentrated on interpretation of meSocosm-studies. However, it contains elements of possible links between exposure and biological effects.

The reports produced by the project are:

Styczen, M., Petersen, S., Christensen, M., Jessen, O.Z., Rasmussen, D., Andersen, M.B. and Sørensen, P.B. (2004): Calibration of models describing pesticide fate and transport in Lillebæk and Odder Bæk Catchment. - Ministry of Environment, Danish Environmental Protection Agency, Pesticides Research No. 62.
Styczen, M., Petersen, S., Sørensen, P.B., Thomsen, M and Patrik, F. (2004): Scenarios and model describing fate and transport of pesticides in surface water for Danish conditions. - Ministry of Environment, Danish Environmental Protection Agency, Pesticides Research No. 63.
Styczen, M., Petersen, S., Olsen, N.K. and Andersen, M.B. (2004): Technical Documentation of PestSurf, a model describing fate and transport of pesticides in surface water for Danish Conditions. - Ministry of Environment, Danish Environmental Protection Agency, Pesticides Research No. 64.
Jensen, P.K. and Spliid, N.H. (2003): Deposition of pesticides on the soil surface. - Ministry of Environment, Danish Environmental Protection Agency, Pesticides Research No. 65.
Asman, W.A.H., Jørgensen, A. and Jensen, P.K. (2003): Dry deposition and spray drift of pesticides to nearby water bodies. - Ministry of Environment, Danish Environmental Protection Agency, Pesticides Research No. 66.
Holm, J., Petersen, C., KOCh, C. and Villholth, K.G. (2003): Facilitated transport of pesticides. - Ministry of Environment, Danish Environmental Protection Agency, Pesticides Research No. 67.
Helweg, C., Mogensen, B.B., Sørensen, P.B., Madsen, T., Rasmussen, D. and Petersen, S. (2003): Fate of pesticides in surface waters, Laboratory and Field Experiments. Ministry of Environment, Danish Environmental Protection Agency, Pesticides Research No. 68.
Møhlenberg, F., Petersen, S., Gustavson, K., Lauridsen, T. and Friberg, N. (2001): Guidelines for evaluating meSocosm experiments in connection with the approval pr°Cedure. - Ministry of Environment and Energy, Danish Environmental Protection Agency, Pesticides Research No. 56.
Iversen, H.L., Kronvang, B., Vejrup, K., Mogensen, B.B., Hansen, A.M. and Hansen, L.B. (2003): Pesticides in streams and subsurface drainage water within two arable catchments in Denmark: Pesticide application, concentration, transport and fate. - Ministry of Environment, Danish Environmental Protection Agency, Pesticides Research No. 69.

The original thoughts behind the project are described in detail in the report "Model Based Tool for Evaluation of Exposure and Effects of Pesticides in Surface Water", Inception Report – J. nr. M 7041-0120, by DHI, VKI, NERI, DIAS and County of Funen, December, 1998.

The project was overseen by a steering committee. The members have made valuable contributions to the project. The committee consisted of:

Inge Vibeke Hansen, Danish Environmental Protection Agency, (chairman 1998-mid 2000).
Jørn Kirkegaard, Danish Environmental Protection Agency (chairman mid^-2000^-2002).
Christian Deibjerg Hansen, Danish Environmental Protection Agency.
Heidi Christiansen Barlebo, The Geological Survey of Denmark and Greenland.
Mogens Erlandsen, University of Aarhus.
Karl Henrik Vestergaard, Syngenta Crop Protection A/S.
Valery Forbes, Roskilde University.
Lars Stenvang Hansen, Danish Agricultural Advisory Centre (1998^-2001).
Poul-Henning Petersen, Danish Agricultural Advisory Centre (2002).
Bitten Bolet, County of Ringkøbing (1988^-1999).
Stig Eggert Pedersen, County of Funen (1999^-2002).
Hanne Bach, The National Environmental Research Institute (1999^-2002).

October 2002

Merete Styczen, project co-ordinator