ber</dt>
<dd><p>Character string vector of seven digit Water Survey of Canada station numbers (e.g. <code>"08NM116"</code>) of
which to extract daily streamflow data from a HYDAT database. Requires <code>tidyhydat</code> package and a HYDAT database.
Leave blank if using <code>data</code> argument.</p></dd>


<dt>roll_days</dt>
<dd><p>Numeric value of the number of days to apply a rolling mean. Default <code>1</code>.</p></dd>


<dt>roll_align</dt>
<dd><p>Character string identifying the direction of the ro