[Tagging] Flood prone areas - link to measurement stations

[Jez Nicholson]

I work with this data as part of my job, and yes you can make some
assumptions connecting particular gauges to areas but it gets complex. The
system has Environment Agency staff who open sluice gates, flood farmers
fields, divert water upstream, etc. triggered by rising levels at
particular gauges. Rivers don't behave the same either, so it's down to
local EA staff's experience to decide what works best....so, hard to
predict.

On Sat, 13 Feb 2021, 23:08 Paul Allen, <pla16021 at gmail.com> wrote:

> On Sat, 13 Feb 2021 at 22:06, Andy Townsend <ajt1047 at gmail.com> wrote:
>
>>
>> It's possible to estimate when a particular location on a river will be
>> flooded based on the downstream (and to a lesser extent upstream)
>> monitoring station level.  Has anyone considered linking these together
>> in any way?  So far I've added a note on e.g.
>> https://www.openstreetmap.org/way/37535250 to say "When
>> https://www.openstreetmap.org/node/8373389773 says 2.7m, flooded here",
>> but some more formal way of saying that would make sense. I can happily
>> invent something, but don't want to do that if an existing tagging
>> already exists.
>>
>
> This doesn't cover what you're proposing to do, but it may be worth taking
> a look at and possibly collaborating with: https://riverlevels.uk/map
> It doesn't just have locations of monitoring stations, it shows their
> current levels (it used to also show a graph of historical data but
> that seems to have gone).  It also shows flood zones:
> https://riverlevels.uk/flood-warning-cardigan-tidal
>
> --
> Paul
>
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