Analysis of the Experimental Field Data for Sulfometuron Methyl
Appendix A to EXPERT REPORT of
Dr. Jiří Šimůnek Department of Environmental Sciences University of California Riverside Riverside, CA 92521, USA RE: Adams et al. v. USA et al.
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Analysis of Field Sulfometuron Methyl Data
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Analysis of Field Sulfometuron Methyl Data
Table of Contents Table of Contents ............................................................................................................................ 3 List of Figures ................................................................................................................................. 5 List of Tables .................................................................................................................................. 6 Introduction ..................................................................................................................................... 7 Theory ............................................................................................................................................. 8 Analysis of the Anderson and Dulka (1985) Dataset from Fort Collins, Colorado. ..................... 11 Background ............................................................................................................................. 11 Constant Degradation Rate, Independent of Temperature ...................................................... 14 Constant Degradation Rate, Zero for Freezing Temperatures ................................................ 15 Temperature Dependent Degradation Rate ............................................................................. 16 A Two-Rate Degradation Process ........................................................................................... 17 Discussion ............................................................................................................................... 19 Analysis of the Trubey (1994) Dataset from Madera, California. ................................................ 20 Background ............................................................................................................................. 20 Constant Degradation Rate, Independent of Temperature ...................................................... 22 Temperature Dependent Degradation Rate ............................................................................. 22 A Two-Rate Degradation Process ........................................................................................... 23 Conclusions ................................................................................................................................... 24 References ..................................................................................................................................... 27
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Analysis of Field Sulfometuron Methyl Data
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Analysis of Field Sulfometuron Methyl Data
List of Figures Figure
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Figure A.1.
Air temperatures at the Fort Collins site in Colorado during the Sulfometuron Methyl field experiment. Time zero corresponds with the application date of Sulfometuron Methyl. ............................................................................................11
Figure A.2.
Analysis of the Fort Collins dataset assuming a constant , independent of temperature T. The raw (left) and log-transformed (right) Sulfometuron Methyl data reported in the report (top) and the paper (bottom) (Colorado1(a) and ColoradoX1(a) scenarios, respectively). ................................................................14
Figure A.3.
Analysis of the Fort Collins dataset assuming a constant for T > 0oC and = 0 for T < 0oC. The raw (left) and log-transformed (right) Sulfometuron Methyl data reported in the report (top) and the paper (bottom) (Colorado2(a) and ColoradoX2(a) scenarios, respectively). ................................................................15
Figure A.4.
Analysis of the Fort Collins dataset assuming a temperature dependent degradation rate for T > 0oC and = 0 for T < 0oC. The raw (left) and logtransformed (right) Sulfometuron Methyl data reported in the report (top) and the paper (bottom) (Colorado3 and ColoradoX3 scenarios, respectively). .................16
Figure A.5.
Analysis of the Fort Collins dataset for scenarios Colorado4 (constant and ') (top left), Colorado4a (constant and ' for T>0, ='=0 for T0=0 for T0=0 for T0=0 for T0, ='=0 for T0 0.0244 0.00462 28.4 150.0 43 ='=0 for T