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

Contents

Preface

Sammenfatning og konklusioner

Summary and conclusions

1 Technical Background Information

2 New Process Descriptions

• 2.1 Wind drift
• 2.2 Deposition of soil surfaces
• 2.3 Dry deposition
  • 2.3.1 Emission
  • 2.3.2 Dry deposition
  • 2.3.3 Atmospheric diffusion
  • 2.3.4 Integration of processes in the PESTDEP model
  • 2.3.5 Example of an input file
• 2.4 Colloid transport
  • 2.4.1 Generation of colloidal particles
  • 2.4.2 Modification of Macropore Module for MIKE SHE
  • 2.4.3 Transport of colloids
  • 2.4.4 Transport of active substance
  • 2.4.5 Reactions accounted for in the solver
  • 2.4.6 Parameterisation used in PestSurf
• 2.5 Transport and transmission process in the streams and ponds
  • 2.5.1 Sedimentation and resuspension
  • 2.5.2 Diffusive exchange between water column and sediment in the rivers
  • 2.5.3 Diffusive exchange between water column and sediment in ponds
  • 2.5.4 Sorption to particles in water column and sediment
  • 2.5.5 Sorption to macrophytes
  • 2.5.6 Biodegradation of active substances
  • 2.5.7 Photolytic degradation of active substances
  • 2.5.8 Hydrolysis
  • 2.5.9 Evaporation

3 User Interface

• 3.1 How to start the system
• 3.2 The system
• 3.3 General Menu-pages
  • 3.3.1 Basic parameters
  • 3.3.2 Catchment and type of surface water
  • 3.3.3 Crop
  • 3.3.4 Width of protection zone
  • 3.3.5 Spraying data
  • 3.3.6 Basic chemical and physical properties of the active substance (and metabolite)
  • 3.3.7 Sorption of active substance in soil
  • 3.3.8 Degradation of active substance in soil
  • 3.3.9 Sorption of active substance in surface water
  • 3.3.10 Aerobic degradation of active substance in surface water
  • 3.3.11 Anaerobic degradation of active substance in surface water
  • 3.3.12 Hydrolysis of active substance in surface water
  • 3.3.13 Photolysis of active substance in surface water
  • 3.3.14 Pesticide transformations to metabolite

4 Result Presentation

• 4.1 Water balances
• 4.2 Solute balances
• 4.3 Graphical presentation of stream results
• 4.4 Sediment concentrations

5 Statistical Functions Included

6 References

Appendix A - Measured and Fitted Wind Drift Curves

Appendix B - Tsf- and xtsf-file Samples

Appendix C - Examples of *.ad11, *.PE11 files used for MIKE 11

Appendix D - Basic Soil Data for Calculation of T2-files Required for the Setup

Appendix E - Application of Pesticide Diffusion in Sediments to MIKE 11

Appendix F - Sediment compostion

Appendix G - Calculation of biodegradation

Appendix H - Help File