diff options
Diffstat (limited to 'docs/reference/GUS.html')
| -rw-r--r-- | docs/reference/GUS.html | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/docs/reference/GUS.html b/docs/reference/GUS.html new file mode 100644 index 0000000..f65c6fd --- /dev/null +++ b/docs/reference/GUS.html @@ -0,0 +1,181 @@ +<!-- Generated by pkgdown: do not edit by hand --> +<!DOCTYPE html> +<html> + <head> + <meta charset="utf-8"> +<meta http-equiv="X-UA-Compatible" content="IE=edge"> +<meta name="viewport" content="width=device-width, initial-scale=1.0"> + +<title>Groundwater ubiquity score based on Gustafson (1989) — GUS • pfm</title> + +<!-- jquery --> +<script src="https://code.jquery.com/jquery-3.1.0.min.js" integrity="sha384-nrOSfDHtoPMzJHjVTdCopGqIqeYETSXhZDFyniQ8ZHcVy08QesyHcnOUpMpqnmWq" crossorigin="anonymous"></script> +<!-- Bootstrap --> + +<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> +<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script> + +<!-- Font Awesome icons --> +<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous"> + + +<!-- pkgdown --> +<link href="../pkgdown.css" rel="stylesheet"> +<script src="../jquery.sticky-kit.min.js"></script> +<script src="../pkgdown.js"></script> + +<!-- mathjax --> +<script src='https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script> + +<!--[if lt IE 9]> +<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script> +<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> +<![endif]--> + </head> + + <body> + <div class="container template-reference-topic"> + <header> + <div class="navbar navbar-default navbar-fixed-top" role="navigation"> + <div class="container"> + <div class="navbar-header"> + <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar"> + <span class="icon-bar"></span> + <span class="icon-bar"></span> + <span class="icon-bar"></span> + </button> + <a class="navbar-brand" href="../index.html">pfm</a> + </div> + <div id="navbar" class="navbar-collapse collapse"> + <ul class="nav navbar-nav"> + <li> + <a href="../reference/index.html">Reference</a> +</li> + </ul> + + <ul class="nav navbar-nav navbar-right"> + + </ul> + </div><!--/.nav-collapse --> + </div><!--/.container --> +</div><!--/.navbar --> + + + </header> + + <div class="row"> + <div class="col-md-9 contents"> + <div class="page-header"> + <h1>Groundwater ubiquity score based on Gustafson (1989)</h1> + </div> + + + <p>The groundwater ubiquity score GUS is calculated according to +the following equation +$$GUS = \log_{10} DT50_{soil} (4 - \log_{10} K_{oc})$$</p> + + + <pre><span class='fu'>GUS</span>(<span class='no'>...</span>) + +<span class='co'># S3 method for numeric</span> +<span class='fu'>GUS</span>(<span class='no'>DT50</span>, <span class='no'>Koc</span>, <span class='no'>...</span>) + +<span class='co'># S3 method for chent</span> +<span class='fu'>GUS</span>(<span class='no'>chent</span>, <span class='kw'>degradation_value</span> <span class='kw'>=</span> <span class='st'>"DT50ref"</span>, + <span class='kw'>lab_field</span> <span class='kw'>=</span> <span class='st'>"laboratory"</span>, <span class='kw'>redox</span> <span class='kw'>=</span> <span class='st'>"aerobic"</span>, <span class='kw'>sorption_value</span> <span class='kw'>=</span> <span class='st'>"Kfoc"</span>, + <span class='kw'>degradation_aggregator</span> <span class='kw'>=</span> <span class='no'>geomean</span>, <span class='kw'>sorption_aggregator</span> <span class='kw'>=</span> <span class='no'>geomean</span>, <span class='no'>...</span>) + +<span class='co'># S3 method for GUS_result</span> +<span class='fu'>print</span>(<span class='no'>x</span>, <span class='no'>...</span>, <span class='kw'>digits</span> <span class='kw'>=</span> <span class='fl'>1</span>)</pre> + + <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a> Arguments</h2> + <dl class="dl-horizontal"> + <dt>...</dt> + <dd>Included in the generic to allow for further arguments later. Therefore +this also had to be added to the specific methods.</dd> + <dt>DT50</dt> + <dd>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.</dd> + <dt>Koc</dt> + <dd>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).</dd> + <dt>chent</dt> + <dd>If a chent is given with appropriate information present in its +chyaml field, this information is used, with defaults specified below.</dd> + <dt>degradation_value</dt> + <dd>Which of the available degradation values should +be used?</dd> + <dt>lab_field</dt> + <dd>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.</dd> + <dt>redox</dt> + <dd>Aerobic or anaerobic degradation data</dd> + <dt>sorption_value</dt> + <dd>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.</dd> + <dt>degradation_aggregator</dt> + <dd>Function for aggregating half-lives</dd> + <dt>sorption_aggregator</dt> + <dd>Function for aggregation Koc values</dd> + <dt>x</dt> + <dd>An object of class GUS_result to be printed</dd> + <dt>digits</dt> + <dd>The number of digits used in the print method</dd> + </dl> + + <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2> + + <p>A list with the DT50 and Koc used as well as the resulting score + of class GUS_result</p> + + <h2 class="hasAnchor" id="references"><a class="anchor" href="#references"></a>References</h2> + + <p>Gustafson, David I. (1989) Groundwater ubiquity score: a simple +method for assessing pesticide leachability. <em>Environmental +toxicology and chemistry</em> <b>8</b>(4) 339–57.</p> + + + </div> + <div class="col-md-3 hidden-xs hidden-sm" id="sidebar"> + <h2>Contents</h2> + <ul class="nav nav-pills nav-stacked"> + <li><a href="#arguments">Arguments</a></li> + + <li><a href="#value">Value</a></li> + + <li><a href="#references">References</a></li> + </ul> + + <h2>Author</h2> + +Johannes Ranke + + </div> +</div> + + <footer> + <div class="copyright"> + <p>Developed by Johannes Ranke.</p> +</div> + +<div class="pkgdown"> + <p>Site built with <a href="http://hadley.github.io/pkgdown/">pkgdown</a>.</p> +</div> + + </footer> + </div> + + </body> +</html> |