<div dir="ltr"><div dir="ltr"><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr">On Mon, 18 Feb 2019 at 20:44, Fernando Trebien <<a href="mailto:fernando.trebien@gmail.com">fernando.trebien@gmail.com</a>> wrote:<br></div></div></div></div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I think my problem in particular is determining when it is navigable<br>
or not. It's like the difference between seasonal=* (predictable) and<br>
intermittent=* (unpredictable), my case is the intermittent one.<br>
<br>
The local authority does not publish depth information about the<br>
rivers, but publishes vessel draft. Historic depth data from river<br>
monitoring stations show that some are navigable most of the time, but<br>
can become shallow any month of the year, depending on the amount of<br>
rainfall. Over the last 10 years, records of one river reveal depths<br>
varying from ~0.5m to ~10m, and both minimum and maximum are reached<br>
every month (but the pattern changes year-to-year due to irregular<br>
rain).<br></blockquote><div><br></div><div>With a range like that, that changes so frequently, I think you're stuck with =intermittent, maybe with a description= to say that water depth is constantly varying between 0.5 & 10m? !<br></div><div><br></div><div>Thanks<div><br></div><div>Graeme</div></div></div></div>