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<title>Calculate predicted environmental concentrations in sediment from surface
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<h1>Calculate predicted environmental concentrations in sediment from surface
water concentrations</h1>
<small class="dont-index">Source: <a href='https://github.com/jranke/pfm/blob/master/R/PEC_sw_sed.R'><code>R/PEC_sw_sed.R</code></a></small>
<div class="hidden name"><code>PEC_sw_sed.Rd</code></div>
</div>
<div class="ref-description">
<p>The method 'percentage' is equivalent to what is used in the CRD spreadsheet
PEC calculator</p>
</div>
<pre class="usage"><span class='fu'>PEC_sw_sed</span>(<span class='no'>PEC_sw</span>, <span class='kw'>percentage</span> <span class='kw'>=</span> <span class='fl'>100</span>, <span class='kw'>method</span> <span class='kw'>=</span> <span class='st'>"percentage"</span>,
<span class='kw'>sediment_depth</span> <span class='kw'>=</span> <span class='fl'>5</span>, <span class='kw'>water_depth</span> <span class='kw'>=</span> <span class='fl'>30</span>, <span class='kw'>sediment_density</span> <span class='kw'>=</span> <span class='fl'>1.3</span>,
<span class='kw'>PEC_sed_units</span> <span class='kw'>=</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/c'>c</a></span>(<span class='st'>"µg/kg"</span>, <span class='st'>"mg/kg"</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>PEC_sw</th>
<td><p>Numeric vector or matrix of surface water concentrations in µg/L for
which the corresponding sediment concentration is to be estimated</p></td>
</tr>
<tr>
<th>percentage</th>
<td><p>The percentage in sediment, used for the percentage method</p></td>
</tr>
<tr>
<th>method</th>
<td><p>The method used for the calculation</p></td>
</tr>
<tr>
<th>sediment_depth</th>
<td><p>Depth of the sediment layer</p></td>
</tr>
<tr>
<th>water_depth</th>
<td><p>Depth of the water body in cm</p></td>
</tr>
<tr>
<th>sediment_density</th>
<td><p>The density of the sediment in L/kg (equivalent to
g/cm3)</p></td>
</tr>
<tr>
<th>PEC_sed_units</th>
<td><p>The units of the estimated sediment PEC value</p></td>
</tr>
</table>
<h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
<p>The predicted concentration in sediment</p>
<h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
<pre class="examples"><div class='input'><span class='fu'>PEC_sw_sed</span>(<span class='fu'><a href='PEC_sw_drift.html'>PEC_sw_drift</a></span>(<span class='fl'>100</span>, <span class='kw'>distances</span> <span class='kw'>=</span> <span class='fl'>1</span>), <span class='kw'>percentage</span> <span class='kw'>=</span> <span class='fl'>50</span>)</div><div class='output co'>#> 1 m
#> 2.130769 </div></pre>
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<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="#examples">Examples</a></li>
</ul>
<h2>Author</h2>
<p>Johannes Ranke</p>
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