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<title>PEC_sw_drift_ini. pfm 0.2-4</title>
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Johannes Ranke
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<h1>Calculate initial predicted environmental concentrations in surface water due to drift</h1>
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<div class="span8">
<h2>Usage</h2>
<pre><div>PEC_sw_drift_ini(rate, applications = 1, water_depth = 30, drift_data = "JKI", crop = "Ackerbau", distances = c(1, 5, 10, 20), rate_units = "g/ha", PEC_units = "µg/L")</div></pre>
<h2>Arguments</h2>
<dl>
<dt>rate</dt>
<dd>Application rate in units specified below</dd>
<dt>applications</dt>
<dd>Number of applications for selection of drift percentile</dd>
<dt>water_depth</dt>
<dd>Depth of the water body in cm</dd>
<dt>drift_data</dt>
<dd>Source of drift percentage data</dd>
<dt>crop</dt>
<dd>Crop name (use German names for JKI data), defaults to "Ackerbau"</dd>
<dt>distances</dt>
<dd>The distances in m for which to get PEC values</dd>
<dt>rate_units</dt>
<dd>Defaults to g/ha</dd>
<dt>PEC_units</dt>
<dd>Requested units for the calculated PEC. Only µg/L currently supported</dd>
</dl>
<div class="Value">
<h2>Value</h2>
<p><dl>
The predicted concentration in surface water
</dl></p>
</div>
<div class="Description">
<h2>Description</h2>
<p>This is a basic, vectorised form of a simple calculation of a contaminant
concentration in surface water based on complete, instantaneous mixing
with input via spray drift.</p>
</div>
<h2 id="examples">Examples</h2>
<pre class="examples"><div class='input'>PEC_sw_drift_ini(100)
</div>
<div class='output'> 1 m 5 m 10 m 20 m
0.92333333 0.19000000 0.09666667 0.05000000
</div></pre>
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<h2>Author</h2>
Johannes Ranke
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