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authorJohannes Ranke <jranke@uni-bremen.de>2020-06-17 13:37:59 +0200
committerJohannes Ranke <jranke@uni-bremen.de>2020-06-17 13:37:59 +0200
commite3bc264df69f892e9ad990be22d3ec1b22041daa (patch)
treeec7da06ca3e9939b95712f577a1ff720cee1716e /docs/reference/TSCF.html
parente505ecc4aba0f6719fd772faa2655dd824a6930d (diff)
TSCF estimation equations, update docs
Briggs et al. (1982) and Dettenmaier et al. (2009)
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+log Kow for neutral pH must be available in order to apply the Briggs
+equation. It is not clarified when it can be regarded reliable, but the
+equation is stated to be produced for non-ionic compounds, suggesting that
+the compound should not be ionogenic (weak acid/base)
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+ <h1>Estimation of the transpiration stream concentration factor</h1>
+
+ <div class="hidden name"><code>TSCF.Rd</code></div>
+ </div>
+
+ <div class="ref-description">
+ <p>The FOCUS groundwater guidance (FOCUS 2014, p. 41) states that a reliable measured
+log Kow for neutral pH must be available in order to apply the Briggs
+equation. It is not clarified when it can be regarded reliable, but the
+equation is stated to be produced for non-ionic compounds, suggesting that
+the compound should not be ionogenic (weak acid/base)
+or ionic.</p>
+ </div>
+
+ <pre class="usage"><span class='fu'>TSCF</span>(<span class='no'>log_Kow</span>, <span class='kw'>method</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='st'>"briggs82"</span>, <span class='st'>"dettenmaier09"</span>))</pre>
+
+ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
+ <table class="ref-arguments">
+ <colgroup><col class="name" /><col class="desc" /></colgroup>
+ <tr>
+ <th>log_Kow</th>
+ <td><p>The decadic logarithm of the octanol-water partition constant</p></td>
+ </tr>
+ <tr>
+ <th>method</th>
+ <td><p>Short name of the estimation method.</p></td>
+ </tr>
+ </table>
+
+ <h2 class="hasAnchor" id="details"><a class="anchor" href="#details"></a>Details</h2>
+
+ <p>The Dettenmaier equation is given to show that other views on the subject exist.</p>
+ <h2 class="hasAnchor" id="references"><a class="anchor" href="#references"></a>References</h2>
+
+ <p>FOCUS (2014) Generic Guidance for Tier 1 FOCUS Ground Water Assessments.
+ Version 2.2, May 2014
+Dettenmaier EM, Doucette WJ and Bugbee B (2009) Chemical hydrophobicity and uptake
+by plant roots. Environ. Sci. Technol 43, 324 - 329</p>
+
+ <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
+ <pre class="examples"><div class='input'><span class='fu'><a href='https://rdrr.io/r/base/plot.html'>plot</a></span>(<span class='no'>TSCF</span>, -<span class='fl'>1</span>, <span class='fl'>5</span>, <span class='kw'>xlab</span> <span class='kw'>=</span> <span class='st'>"log Kow"</span>, <span class='kw'>ylab</span> <span class='kw'>=</span> <span class='st'>"TSCF"</span>, <span class='kw'>ylim</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='fl'>0</span>, <span class='fl'>1.1</span>))</div><div class='input'><span class='no'>TSCF_2</span> <span class='kw'>&lt;-</span> <span class='kw'>function</span>(<span class='no'>x</span>) <span class='fu'>TSCF</span>(<span class='no'>x</span>, <span class='kw'>method</span> <span class='kw'>=</span> <span class='st'>"dettenmaier09"</span>)
+<span class='fu'><a href='https://rdrr.io/r/graphics/curve.html'>curve</a></span>(<span class='no'>TSCF_2</span>, -<span class='fl'>1</span>, <span class='fl'>5</span>, <span class='kw'>add</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>, <span class='kw'>lty</span> <span class='kw'>=</span> <span class='fl'>2</span>)</div><div class='input'><span class='fu'><a href='https://rdrr.io/r/graphics/legend.html'>legend</a></span>(<span class='st'>"topright"</span>, <span class='kw'>lty</span> <span class='kw'>=</span> <span class='fl'>1</span>:<span class='fl'>2</span>, <span class='kw'>bty</span> <span class='kw'>=</span> <span class='st'>"n"</span>,
+ <span class='kw'>legend</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='st'>"Briggs et al. (1982)"</span>, <span class='st'>"Dettenmaier et al. (2009)"</span>))</div><div class='img'><img src='TSCF-1.png' alt='' width='700' height='433' /></div></pre>
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