docs/reference/PEC_sw_exposit_runoff.html


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<title>Calculate PEC surface water due to runoff and erosion as in Exposit 3 — PEC_sw_exposit_runoff • pfm</title>

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    <h1>Calculate PEC surface water due to runoff and erosion as in Exposit 3</h1>
    </div>

    
    <p>This is a reimplementation of the calculation described in the Exposit 3.01 spreadsheet file,
in the worksheet "Konzept Runoff". Calculation of sediment PEC values is not implemented.</p>
    

    <pre class="usage"><span class='fu'>PEC_sw_exposit_runoff</span>(<span class='no'>rate</span>, <span class='no'>Koc</span>, <span class='kw'>DT50</span> <span class='kw'>=</span> <span class='fl'>Inf</span>, <span class='kw'>t_runoff</span> <span class='kw'>=</span> <span class='fl'>3</span>,
  <span class='kw'>exposit_reduction_version</span> <span class='kw'>=</span> <span class='fu'>c</span>(<span class='st'>"3.01"</span>, <span class='st'>"2.0"</span>), <span class='kw'>V_ditch</span> <span class='kw'>=</span> <span class='fl'>30</span>,
  <span class='kw'>V_event</span> <span class='kw'>=</span> <span class='fl'>100</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>The application rate in g/ha</p></td>
    </tr>
    <tr>
      <th>Koc</th>
      <td><p>The sorption coefficient to soil organic carbon</p></td>
    </tr>
    <tr>
      <th>DT50</th>
      <td><p>The soil half-life in days</p></td>
    </tr>
    <tr>
      <th>t_runoff</th>
      <td><p>The time between application and the runoff event, where degradation occurs, in days</p></td>
    </tr>
    <tr>
      <th>exposit_reduction_version</th>
      <td><p>The version of the reduction factors to be used</p></td>
    </tr>
    <tr>
      <th>V_ditch</th>
      <td><p>The volume of the ditch is assumed to be 1 m * 100 m * 30 cm = 30 m3</p></td>
    </tr>
    <tr>
      <th>V_event</th>
      <td><p>The unreduced runoff volume, equivalent to 10 mm precipitation on 1 ha</p></td>
    </tr>
    </table>
    
    <h2 class="hasAnchor" id="source"><a class="anchor" href="#source"></a>Source</h2>

    <p>Excel 3.01 spreadsheet available from
  <a href = 'https://www.bvl.bund.de/DE/04_Pflanzenschutzmittel/03_Antragsteller/04_Zulassungsverfahren/07_Naturhaushalt/psm_naturhaush_node.html#doc1400590bodyText3'>https://www.bvl.bund.de/DE/04_Pflanzenschutzmittel/03_Antragsteller/04_Zulassungsverfahren/07_Naturhaushalt/psm_naturhaush_node.html#doc1400590bodyText3</a></p>
    
    <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>

    <p>A list containing the following components</p><dl class='dl-horizontal'>
    <dt>Input</dt><dd><p>A matrix containing dissolved and bound input for the different distances</p></dd>
    <dt>PEC_sw_runoo</dt><dd><p>A matrix containing PEC values for dissolved and bound substance
      for the different distances. If the rate was given in g/ha, the PECsw are in /L.</p></dd>
  </dl>

    
    <h2 class="hasAnchor" id="see-also"><a class="anchor" href="#see-also"></a>See also</h2>

    <p><code><a href='perc_runoff_exposit.html'>perc_runoff_exposit</a></code> for runoff loss percentages and <code><a href='perc_runoff_reduction_exposit.html'>perc_runoff_reduction_exposit</a></code> for runoff reduction percentages used</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_exposit_runoff</span>(<span class='fl'>500</span>, <span class='fl'>150</span>)</div><div class='output co'>#&gt; $Rate
#&gt; [1] 500
#&gt; 
#&gt; $Koc
#&gt; [1] 150
#&gt; 
#&gt; $Input
#&gt;           dissolved   bound   total
#&gt; No buffer     1.240 0.00500 1.24500
#&gt; 5 m           0.744 0.00300 0.74700
#&gt; 10 m          0.496 0.00075 0.49675
#&gt; 20 m          0.248 0.00025 0.24825
#&gt; 
#&gt; $PEC_sw_runoff
#&gt;           dissolved       bound    total
#&gt; No buffer  4.769231 0.019230769 4.788462
#&gt; 5 m        4.133333 0.016666667 4.150000
#&gt; 10 m       3.542857 0.005357143 3.548214
#&gt; 20 m       2.480000 0.002500000 2.482500
#&gt; </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="#source">Source</a></li>

      <li><a href="#value">Value</a></li>

      <li><a href="#see-also">See also</a></li>
      
      <li><a href="#examples">Examples</a></li>
    </ul>

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