From a76221d87485029444c8e684022ca606a0c7e68d Mon Sep 17 00:00:00 2001 From: Johannes Ranke Date: Wed, 18 Jan 2017 22:41:01 +0100 Subject: Update static docs using pkgdown - Add _pkgdown.yml for a structured function/data reference - Make seealso links active - Make mkinfit calls quiet - Use pkgdown branch from pull request hadley/pkgdown#229 to have topics ordered --- docs/GUS.html | 171 ---------------------------------------------------------- 1 file changed, 171 deletions(-) delete mode 100644 docs/GUS.html (limited to 'docs/GUS.html') diff --git a/docs/GUS.html b/docs/GUS.html deleted file mode 100644 index cb4e10e..0000000 --- a/docs/GUS.html +++ /dev/null @@ -1,171 +0,0 @@ - - - - -GUS. pfm 0.3-8 - - - - - - - - - - - - - - - -
-
-
- pfm 0.3-8 -
- -
-
-
-
- - -
-
- -
- -

Groundwater ubiquity score based on Gustafson (1989)

- -
-
-

Usage

- 
GUS(...)
-
-# S3 method for numeric
-GUS(DT50, Koc, ...)
-
-# S3 method for chent
-GUS(chent, degradation_value = "DT50ref",
-  lab_field = "laboratory", redox = "aerobic", sorption_value = "Kfoc",
-  degradation_aggregator = geomean, sorption_aggregator = geomean, ...)
-
-# S3 method for GUS_result
-print(x, ..., digits = 1)
- -

Arguments

-
-
...
-
Included in the generic to allow for further arguments later. Therefore -this also had to be added to the specific methods.
-
DT50
-
Half-life of the chemical in soil. Should be a field -half-life according to Gustafson (1989). However, leaching to the sub-soil -can not completely be excluded in field dissipation experiments and Gustafson -did not refer to any normalisation procedure, but says the field study should -be conducted under use conditions.
-
Koc
-
The sorption constant normalised to organic carbon. Gustafson -does not mention the nonlinearity of the sorption constant commonly -found and usually described by Freundlich sorption, therefore it is -unclear at which reference concentration the Koc should be observed -(and if the reference concentration would be in soil or in porewater).
-
chent
-
If a chent is given with appropriate information present in its -chyaml field, this information is used, with defaults specified below.
-
degradation_value
-
Which of the available degradation values should -be used?
-
lab_field
-
Should laboratory or field half-lives be used? This -defaults to lab in this implementation, in order to avoid -double-accounting for mobility. If comparability with the original GUS -values given by Gustafson (1989) is desired, non-normalised first-order -field half-lives obtained under actual use conditions should be used.
-
redox
-
Aerobic or anaerobic degradation data
-
sorption_value
-
Which of the available sorption values should be used? -Defaults to Kfoc as this is what is generally available from the European -pesticide peer review process. These values generally use a reference -concentration of 1 mg/L in porewater, that means they would be expected to -be Koc values at a concentration of 1 mg/L in the water phase.
-
degradation_aggregator
-
Function for aggregating half-lives
-
sorption_aggregator
-
Function for aggregation Koc values
-
x
-
An object of class GUS_result to be printed
-
digits
-
The number of digits used in the print method
-
- -
-

Value

- -

-A list with the DT50 and Koc used as well as the resulting score - of class GUS_result -

- -
- -
-

Description

- -

The groundwater ubiquity score GUS is calculated according to -the following equation -$$GUS = \log_{10} DT50_{soil} (4 - \log_{10} K_{oc})$$

- -
- -
-

References

- -

Gustafson, David I. (1989) Groundwater ubiquity score: a simple -method for assessing pesticide leachability. Environmental -toxicology and chemistry 8(4) 339–57.

- -
-
-
- - - - -

Author

- -Johannes Ranke - - -
-
- - -
- - \ No newline at end of file -- cgit v1.2.1