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

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  <div class="span8">
    <h2>Usage</h2>
    <pre><span class="functioncall"><a href='PEC_sw_drainage_UK.html'>PEC_sw_drainage_UK</a></span><span class="keyword">(</span><span class="symbol">rate</span><span class="keyword">,</span> <span class="argument">interception</span>&nbsp;<span class="argument">=</span>&nbsp;<span class="number">0</span><span class="keyword">,</span> <span class="symbol">Koc</span><span class="keyword">,</span> <span class="argument">latest_application</span>&nbsp;<span class="argument">=</span>&nbsp;NULL<span class="keyword">,</span>
  <span class="argument">soil_DT50</span>&nbsp;<span class="argument">=</span>&nbsp;NULL<span class="keyword">,</span> <span class="argument">model</span>&nbsp;<span class="argument">=</span>&nbsp;NULL<span class="keyword">,</span> <span class="argument">model_parms</span>&nbsp;<span class="argument">=</span>&nbsp;NULL<span class="keyword">)</span></pre>
    
    <h2>Arguments</h2>
    <dl>
      <dt>rate</dt>
      <dd>Application rate in g/ha</dd>
      <dt>interception</dt>
      <dd>The fraction of the application rate that does not reach the soil</dd>
      <dt>Koc</dt>
      <dd>The sorption coefficient normalised to organic carbon in L/kg</dd>
      <dt>latest_application</dt>
      <dd>Latest application date, formatted as e.g. &quot;01 July&quot;</dd>
      <dt>soil_DT50</dt>
      <dd>Soil degradation half-life, if SFO kinetics are to be used</dd>
      <dt>model</dt>
      <dd>The soil degradation model to be used. Either one of &quot;FOMC&quot;,
&quot;DFOP&quot;, &quot;HS&quot;, or &quot;IORE&quot;, or an mkinmod object</dd>
      <dt>model_parms</dt>
      <dd>A named numeric vector containing the model parameters</dd>
    </dl>
    
    <div class="Value">
      <h2>Value</h2>

      <p><dl>
The predicted concentration in surface water in µg/L
</dl></p>

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    <div class="Description">
      <h2>Description</h2>

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

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    <h2 id="examples">Examples</h2>
    <pre class="examples"><div class='input'><span class="functioncall"><a href='PEC_sw_drainage_UK.html'>PEC_sw_drainage_UK</a></span><span class="keyword">(</span><span class="number">150</span><span class="keyword">,</span> <span class="argument">Koc</span> <span class="argument">=</span> <span class="number">100</span><span class="keyword">)</span></div>
<div class='output'>[1] 8.076923
</div></pre>
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    <h2>Author</h2>
    
Johannes Ranke


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