guidance of FOCUS degradation kinetics - pfmodels
guidance of FOCUS degradation kinetics - pfmodels
guidance of FOCUS degradation kinetics - pfmodels
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Guidance <strong>FOCUS</strong> Degradation<br />
Kinetics<br />
• Fit SFO<br />
• Fit water and sediment<br />
simultaneously<br />
• Fit 4 (or 3) parameters:<br />
k wc , k sed , r wc (r sed )<br />
STEP 1:<br />
Assume reversible<br />
partitioning.<br />
SFO appropriate?<br />
• Modify fitting routine<br />
stepwise:<br />
1. Exclude outliers<br />
2. Constrain M0<br />
3. Weighting<br />
Deviation from SFO due to<br />
experimental<br />
artifact/decline in microbial<br />
activity? - See text<br />
• Constrain fitting <strong>of</strong> kwc<br />
and/or ksed<br />
conservatively, using<br />
results obtained<br />
at Level P-I and expert<br />
judgement (see text)<br />
Data entry<br />
M0 free, use all data, no weighting<br />
Simultaneous fit <strong>of</strong> <strong>kinetics</strong> to observed data in water column and sediment<br />
No<br />
RUN<br />
SFO<br />
SFO statistically and visually<br />
acceptable?<br />
RUN<br />
SFO<br />
modified and/or constrained<br />
fitting routines<br />
SFO statistically and visually<br />
acceptable?<br />
(modified and/or constrained fitting<br />
routine)<br />
Yes<br />
Yes<br />
STOP<br />
Use SFO results for<br />
modelling at Steps 2 and<br />
3 in <strong>FOCUS</strong> SW<br />
STOP<br />
Use SFO results (modified<br />
and/or constrained fitting<br />
routine) for modelling at<br />
Steps 2 and 3 in <strong>FOCUS</strong> SW<br />
• Fit untill good fit:<br />
visual and statistical<br />
if necessary with constraints<br />
set by experts<br />
STEP 2:<br />
Assume non-reversible partitioning<br />
if justifiable.<br />
SFO appropriate?<br />
STOP<br />
See text (10.2.5 and 10.2.6)<br />
No<br />
No<br />
Repeat from top <strong>of</strong> scheme but assume<br />
non-reversible partitioning.<br />
As above, start with M0 free, all data, no<br />
weighting, and no constraints.<br />
Modify/constrain fitting routines as necessary.<br />
RUN<br />
SFO<br />
SFO statistically and visually<br />
acceptable?<br />
Yes<br />
STOP<br />
Use SFO results for<br />
modelling at Steps 2 and<br />
3 in <strong>FOCUS</strong> SW
Change language