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<!-- Generated by pkgdown: do not edit by hand --><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><title>Function reference • pfm</title><script src="../deps/jquery-3.6.0/jquery-3.6.0.min.js"></script><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><link href="../deps/bootstrap-5.3.1/bootstrap.min.css" rel="stylesheet"><script src="../deps/bootstrap-5.3.1/bootstrap.bundle.min.js"></script><!-- Font Awesome icons --><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/all.min.css" integrity="sha256-mmgLkCYLUQbXn0B1SRqzHar6dCnv9oZFPEC1g1cwlkk=" crossorigin="anonymous"><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/v4-shims.min.css" integrity="sha256-wZjR52fzng1pJHwx4aV2AO3yyTOXrcDW7jBpJtTwVxw=" crossorigin="anonymous"><!-- bootstrap-toc --><script src="https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@v1.0.1/dist/bootstrap-toc.min.js" integrity="sha256-4veVQbu7//Lk5TSmc7YV48MxtMy98e26cf5MrgZYnwo=" crossorigin="anonymous"></script><!-- headroom.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/headroom.min.js" integrity="sha256-AsUX4SJE1+yuDu5+mAVzJbuYNPHj/WroHuZ8Ir/CkE0=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/jQuery.headroom.min.js" integrity="sha256-ZX/yNShbjqsohH1k95liqY9Gd8uOiE1S4vZc+9KQ1K4=" crossorigin="anonymous"></script><!-- clipboard.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.6/clipboard.min.js" integrity="sha256-inc5kl9MA1hkeYUt+EC3BhlIgyp/2jDIyBLS6k3UxPI=" crossorigin="anonymous"></script><!-- search --><script src="https://cdnjs.cloudflare.com/ajax/libs/fuse.js/6.4.6/fuse.js" integrity="sha512-zv6Ywkjyktsohkbp9bb45V6tEMoWhzFzXis+LrMehmJZZSys19Yxf1dopHx7WzIKxr5tK2dVcYmaCk2uqdjF4A==" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/autocomplete.js/0.38.0/autocomplete.jquery.min.js" integrity="sha512-GU9ayf+66Xx2TmpxqJpliWbT5PiGYxpaG8rfnBEk1LL8l1KGkRShhngwdXK1UgqhAzWpZHSiYPc09/NwDQIGyg==" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mark.js/8.11.1/mark.min.js" integrity="sha512-5CYOlHXGh6QpOFA/TeTylKLWfB3ftPsde7AnmhuitiTX4K5SqCLBeKro6sPS8ilsz1Q4NRx3v8Ko2IBiszzdww==" crossorigin="anonymous"></script><!-- pkgdown --><script src="../pkgdown.js"></script><meta property="og:title" content="Function reference"><!-- mathjax --><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script><!--[if lt IE 9]>
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  <a class="nav-link" href="../reference/index.html">Reference</a>
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  <main id="main" class="col-md-9"><div class="page-header">
      <img src="" class="logo" alt=""><h1>Function reference</h1>
    </div>

    <div class="section level2">
      <h2 id="general-utility-functions">General utility functions<a class="anchor" aria-label="anchor" href="#general-utility-functions"></a></h2>
      
      <p class="section-desc"></p><p>Functions that are independent of specific fate modelling areas</p>

      
    </div><div id="" class="section level2">
      
      
      <dl><dt>
          
          <code><a href="geomean.html">geomean()</a></code> 
        </dt>
        <dd>Calculate the geometric mean</dd>
      </dl><dl><dt>
          
          <code><a href="one_box.html">one_box()</a></code> 
        </dt>
        <dd>Create a time series of decline data</dd>
      </dl><dl><dt>
          
          <code><a href="plot.one_box.html">plot(<i>&lt;one_box&gt;</i>)</a></code> 
        </dt>
        <dd>Plot time series of decline data</dd>
      </dl><dl><dt>
          
          <code><a href="sawtooth.html">sawtooth()</a></code> 
        </dt>
        <dd>Create decline time series for multiple applications</dd>
      </dl><dl><dt>
          
          <code><a href="twa.html">twa()</a></code> 
        </dt>
        <dd>Calculate a time weighted average concentration</dd>
      </dl><dl><dt>
          
          <code><a href="max_twa.html">max_twa()</a></code> 
        </dt>
        <dd>The maximum time weighted average concentration for a moving window</dd>
      </dl><dl><dt>
          
          <code><a href="pfm_degradation.html">pfm_degradation()</a></code> 
        </dt>
        <dd>Calculate a time course of relative concentrations based on an mkinmod model</dd>
      </dl><dl><dt>
          
          <code><a href="SFO_actual_twa.html">SFO_actual_twa()</a></code> 
        </dt>
        <dd>Actual and maximum moving window time average concentrations for SFO kinetics</dd>
      </dl><dl><dt>
          
          <code><a href="FOMC_actual_twa.html">FOMC_actual_twa()</a></code> 
        </dt>
        <dd>Actual and maximum moving window time average concentrations for FOMC kinetics</dd>
      </dl><dl><dt>
          
          <code><a href="reexports.html">reexports</a></code> <code><a href="reexports.html">set_nd_nq</a></code> <code><a href="reexports.html">set_nd_nq_focus</a></code> 
        </dt>
        <dd>Objects exported from other packages</dd>
      </dl><dl><dt>
          
          <code><a href="TSCF.html">TSCF()</a></code> 
        </dt>
        <dd>Estimation of the transpiration stream concentration factor</dd>
      </dl></div><div class="section level2">
      <h2 id="predicted-environmental-concentrations-in-soil">Predicted environmental concentrations in soil<a class="anchor" aria-label="anchor" href="#predicted-environmental-concentrations-in-soil"></a></h2>
      
      
    </div><div id="" class="section level2">
      
      
      <dl><dt>
          
          <code><a href="PEC_soil.html">PEC_soil()</a></code> 
        </dt>
        <dd>Calculate predicted environmental concentrations in soil</dd>
      </dl><dl><dt>
          
          <code><a href="PEC_soil_mets.html">PEC_soil_mets()</a></code> 
        </dt>
        <dd>Calculate initial and accumulation PEC soil for a set of metabolites</dd>
      </dl><dl><dt>
          
          <code><a href="soil_scenario_data_EFSA_2015.html">soil_scenario_data_EFSA_2015</a></code> 
        </dt>
        <dd>Properties of the predefined scenarios from the EFSA guidance from 2015</dd>
      </dl><dl><dt>
          
          <code><a href="soil_scenario_data_EFSA_2017.html">soil_scenario_data_EFSA_2017</a></code> 
        </dt>
        <dd>Properties of the predefined scenarios from the EFSA guidance from 2017</dd>
      </dl><dl><dt>
          
          <code><a href="PEC_FOMC_accu_rel.html">PEC_FOMC_accu_rel()</a></code> 
        </dt>
        <dd>Get the relative accumulation of an FOMC model over multiples of an interval</dd>
      </dl><dl><dt>
          
          <code><a href="EFSA_washoff_2017.html">EFSA_washoff_2017</a></code> 
        </dt>
        <dd>Subset of EFSA crop washoff default values</dd>
      </dl></div><div class="section level2">
      <h2 id="predicted-environmental-concentrations-in-groundwater">Predicted environmental concentrations in groundwater<a class="anchor" aria-label="anchor" href="#predicted-environmental-concentrations-in-groundwater"></a></h2>
      
      
    </div><div id="" class="section level2">
      
      
      <dl><dt>
          
          <code><a href="FOCUS_GW_scenarios_2012.html">FOCUS_GW_scenarios_2012</a></code> 
        </dt>
        <dd>A very small subset of the FOCUS Groundwater scenario definitions</dd>
      </dl><dl><dt>
          
          <code><a href="EFSA_GW_interception_2014.html">EFSA_GW_interception_2014</a></code> 
        </dt>
        <dd>Subset of EFSA crop interception default values for groundwater modelling</dd>
      </dl></div><div class="section level2">
      <h2 id="predicted-environmental-concentrations-in-surface-water">Predicted environmental concentrations in surface water<a class="anchor" aria-label="anchor" href="#predicted-environmental-concentrations-in-surface-water"></a></h2>
      
      
    </div><div id="" class="section level2">
      
      
      <dl><dt>
          
          <code><a href="PEC_sw_drift.html">PEC_sw_drift()</a></code> 
        </dt>
        <dd>Calculate predicted environmental concentrations in surface water due to drift</dd>
      </dl><dl><dt>
          
          <code><a href="drift_data_JKI.html">drift_data_JKI</a></code> 
        </dt>
        <dd>Deposition from spray drift expressed as percent of the applied dose as
published by the JKI</dd>
      </dl><dl><dt>
          
          <code><a href="drift_parameters_focus.html">drift_parameters_focus</a></code> 
        </dt>
        <dd>Regression parameters for the Rautmann drift data</dd>
      </dl><dl><dt>
          
          <code><a href="drift_percentages_rautmann_formula.html">drift_percentages_rautmann_formula()</a></code> 
        </dt>
        <dd>Calculate the drift percentages according to the Rautmann formula</dd>
      </dl><dl><dt>
          
          <code><a href="PEC_sw_drainage_UK.html">PEC_sw_drainage_UK()</a></code> 
        </dt>
        <dd>Calculate initial predicted environmental concentrations in surface water due to drainage using the UK method</dd>
      </dl><dl><dt>
          
          <code><a href="PEC_sw_sed.html">PEC_sw_sed()</a></code> 
        </dt>
        <dd>Calculate predicted environmental concentrations in sediment from surface
water concentrations</dd>
      </dl><dl><dt>
          
          <code><a href="PEC_sw_focus.html">PEC_sw_focus()</a></code> 
        </dt>
        <dd>Calculate PEC surface water at FOCUS Step 1</dd>
      </dl><dl><dt>
          
          <code><a href="chent_focus_sw.html">chent_focus_sw()</a></code> 
        </dt>
        <dd>Create a chemical compound object for FOCUS Step 1 calculations</dd>
      </dl><dl><dt>
          
          <code><a href="FOCUS_Step_12_scenarios.html">FOCUS_Step_12_scenarios</a></code> 
        </dt>
        <dd>Step 1/2 scenario data as distributed with the FOCUS Step 1/2 calculator</dd>
      </dl><dl><dt>
          
          <code><a href="PEC_sw_exposit_drainage.html">PEC_sw_exposit_drainage()</a></code> 
        </dt>
        <dd>Calculate PEC surface water due to drainage as in Exposit 3</dd>
      </dl><dl><dt>
          
          <code><a href="PEC_sw_exposit_runoff.html">PEC_sw_exposit_runoff()</a></code> 
        </dt>
        <dd>Calculate PEC surface water due to runoff and erosion as in Exposit 3</dd>
      </dl><dl><dt>
          
          <code><a href="perc_runoff_exposit.html">perc_runoff_exposit</a></code> 
        </dt>
        <dd>Runoff loss percentages as used in Exposit 3</dd>
      </dl><dl><dt>
          
          <code><a href="perc_runoff_reduction_exposit.html">perc_runoff_reduction_exposit</a></code> 
        </dt>
        <dd>Runoff reduction percentages as used in Exposit</dd>
      </dl><dl><dt>
          
          <code><a href="TOXSWA_cwa.html">TOXSWA_cwa</a></code> 
        </dt>
        <dd>R6 class for holding TOXSWA water concentration data and associated statistics</dd>
      </dl><dl><dt>
          
          <code><a href="read.TOXSWA_cwa.html">read.TOXSWA_cwa()</a></code> 
        </dt>
        <dd>Read TOXSWA surface water concentrations</dd>
      </dl><dl><dt>
          
          <code><a href="plot.TOXSWA_cwa.html">plot(<i>&lt;TOXSWA_cwa&gt;</i>)</a></code> 
        </dt>
        <dd>Plot TOXSWA surface water concentrations</dd>
      </dl></div><div class="section level2">
      <h2 id="classifications-and-indicators">Classifications and indicators<a class="anchor" aria-label="anchor" href="#classifications-and-indicators"></a></h2>
      
      <p class="section-desc"></p><p>Evaluating environmental fate properties</p>

      
    </div><div id="" class="section level2">
      
      
      <dl><dt>
          
          <code><a href="SSLRC_mobility_classification.html">SSLRC_mobility_classification()</a></code> 
        </dt>
        <dd>Determine the SSLRC mobility classification for a chemical substance from its Koc</dd>
      </dl><dl><dt>
          
          <code><a href="GUS.html">GUS()</a></code> <code><a href="GUS.html">print(<i>&lt;GUS_result&gt;</i>)</a></code> 
        </dt>
        <dd>Groundwater ubiquity score based on Gustafson (1989)</dd>
      </dl></div><div class="section level2">
      <h2 id="work-with-chent-objects-containing-relevant-information">Work with chent objects containing relevant information<a class="anchor" aria-label="anchor" href="#work-with-chent-objects-containing-relevant-information"></a></h2>
      
      
    </div><div id="" class="section level2">
      
      
      <dl><dt>
          
          <code><a href="endpoint.html">endpoint()</a></code> <code><a href="endpoint.html">soil_DT50()</a></code> <code><a href="endpoint.html">soil_Kfoc()</a></code> <code><a href="endpoint.html">soil_N()</a></code> <code><a href="endpoint.html">soil_sorption()</a></code> 
        </dt>
        <dd>Retrieve endpoint information from the chyaml field of a chent object</dd>
      </dl></div><div class="section level2">
      <h2 id="utilities">Utilities<a class="anchor" aria-label="anchor" href="#utilities"></a></h2>
      
      
    </div><div id="" class="section level2">
      
      
      <dl><dt>
          
          <code><a href="get_vertex.html">get_vertex()</a></code> 
        </dt>
        <dd>Fit a parabola through three points</dd>
      </dl></div>
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