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Facilitated transport of pesticides
Table of Contents
Preface
Summary and conclusions
Sammenfatning og konklusioner
1 Purpose
2 Field experiments
2.1 Description of experimental setup
2.1.1 Physical layout
2.1.2 Soil
2.1.3 Tillage treatment
2.1.4 Chemical Application
2.1.5 Sampling of drain water and soil
2.1.6 Analyses
3 Results
3.1 Rainfall, soil conditions, and drain flow
3.2 Dynamics of herbicide concentrations in drain water
3.2.1 Pendimethalin, 1999/00 season
3.2.2 Pendimethalin and Ioxynil, 2000/01 season
3.3 Herbicide concentrations and turbidity
3.4 Fractionation of Pendimethalin
3.5 Cumulative losses
3.6 Investigation of fractionation in model areas
3.7 Sorption of Pendimethalin
4 Modelling of experiments
4.1 Application of MIKE SHE with colloid module to data from Rørrendegaard
4.2 Flow setup and calibration
4.3 Calibration and sensitivity analysis of colloid transport
4.4 Calibration of Pendimethalin transport
4.4.1 Colloid-facilitated transport of pesticide
4.5 Evaluation of colloid-facilitated transport
4.5.1 Future development of model
5 Discussion
5.1 Pesticide leaching
5.2 Leaching dynamics
5.2.1 Soil particles
5.2.2 Pendimethalin and Ioxynil
5.3 Particle-facilitated transport
5.3.1 Correlation between turbidity and Pendimethalin
5.3.2 Fractionation analysis
6 Conclusion
7 References
Appendix A. Measured concentrations of pesticide
Appendix B. Measured turbidity and extrapolated soil particle concentrations
Appendix C. Sensitivity analysis for colloid-module
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