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<title>Calculate initial predicted environmental concentrations in surface water due to drainage using the UK method — PEC_sw_drainage_UK • pfm</title>

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    <h1>Calculate initial predicted environmental concentrations in surface water due to drainage using the UK method</h1>
    </div>

    
    <p>This implements the method specified in the UK data requirements handbook and was checked against the spreadsheet
published on the CRC website</p>
    

    <pre class="usage"><span class='fu'>PEC_sw_drainage_UK</span>(<span class='no'>rate</span>, <span class='kw'>interception</span> <span class='kw'>=</span> <span class='fl'>0</span>, <span class='no'>Koc</span>, <span class='kw'>latest_application</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>soil_DT50</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>model</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>model_parms</span> <span class='kw'>=</span> <span class='kw'>NULL</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>rate</th>
      <td><p>Application rate in g/ha</p></td>
    </tr>
    <tr>
      <th>interception</th>
      <td><p>The fraction of the application rate that does not reach the soil</p></td>
    </tr>
    <tr>
      <th>Koc</th>
      <td><p>The sorption coefficient normalised to organic carbon in L/kg</p></td>
    </tr>
    <tr>
      <th>latest_application</th>
      <td><p>Latest application date, formatted as e.g. "01 July"</p></td>
    </tr>
    <tr>
      <th>soil_DT50</th>
      <td><p>Soil degradation half-life, if SFO kinetics are to be used</p></td>
    </tr>
    <tr>
      <th>model</th>
      <td><p>The soil degradation model to be used. Either one of "FOMC",
"DFOP", "HS", or "IORE", or an mkinmod object</p></td>
    </tr>
    <tr>
      <th>model_parms</th>
      <td><p>A named numeric vector containing the model parameters</p></td>
    </tr>
    </table>
    
    <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>

    <p>The predicted concentration in surface water in µg/L</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_drainage_UK</span>(<span class='fl'>150</span>, <span class='kw'>Koc</span> <span class='kw'>=</span> <span class='fl'>100</span>)</div><div class='output co'>#&gt; [1] 8.076923</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>
    
Johannes Ranke

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