Re: [Talk-GB] SuDS (Sustainable Urban Drainage Systems)

[Warin]

The area I would tag as a landuse=basin, 
basin=detention/retension/infiltration. That is what I have done around me.
Most of these are larger than your example, the largest one that I know 
of is https://www.openstreetmap.org/way/282846991.


Some sports field are used as a detention pond when high rates of rain 
fall cause the drainage system to back up, the over flow is held by the 
low lying sports field for later drainage. I have left these alone - a 
temporary use that won't often be seen I hope.


On 20/06/19 00:09, Jez Nicholson wrote:
My client GeoSmart are experts on SuDS, further reading at 
https://geosmartinfo.co.uk/knowledge-hub/sustainable-drainage-systems/


Many/most planning applications for new developments now have to 
mitigate the drainage area that has been lost to 
houses/drives/roads/etc. It can be difficult to identify a SuDS 
installation as they are deliberately blended into the site. It might 
just be a pond at the bottom of a larger dipped area that'll take some 
of the bite out of a flash flood.




On Wed, Jun 19, 2019 at 2:46 PM SK53 > wrote:


Last night before visiting the pub we had a look at part of
Sheffield's "Grey-to-Green" SuDS system. Unfortunately all my
batteries ad packed up at this point, but there are some decent
pictures on twitter
.
The bit we looked at was outside the courthouses. It consisted of :

  * A bio-swale. Planted with a colourful mixture of plants most
of which I've forgotten now, although I do recall Jerusalem
Sage. The ground was a gravel mix with presumably a
geo-membrane underneath to retain water. A few birches were
also planted along the length of the swale. Superficially this
just looks from a distance like a large ornamental flower bed.
  * Concrete 'dams' periodically, along the swale, rising to
within a few inches of pavement level and with a v-shaped
notch in the centre. Obviously these are not really dams, more
a type of weir, being designed to moderate the flow of water
through pooling behind each dam. I've seen similar
constructions in the Alps albeit on a larger scale.
  * At the bottom of the swale a more obvious drainage channel.
Where the swale is broken for pedestrian access this runs in a
recessed gutter covered by a grille.

There are probably other features of the completed scheme which we
didn't see. I notice many new-build housing estates will have an
area set aside as a water retention basin.

I've previously noted a SuDS along Ribblesdale Road


in Nottingham, but the features involved are on too small a scale
to consider mapping for now.

This type of infrastructure is becoming much more popular,
particularly with extreme flooding events due to surface run-off.
I'd hoped to look at the one in Sheffield, and fortunately Laura
both remembered this and where it was. Larger ones are relatively
simple to map the main features, choosing viable & appropriate
tags is more challenging. I've had a go
, but am
very open to other suggestions. I suspect the whole swale should
be mapped as a waterway feature. For now I've used waterway=drain
with intermittent=yes for the channel in the swale & the
connecting part of the drain running in a covered gutter (one
import in Santa Clara Co, CA opted for waterway=stream). However
many of the features could use man-made rather than waterway tags.

In conclusion: there's probably a SuDS near you; they're hard to
tag (for know); but not too hard to map; we could do with thinking
about better tags.

Regards,

Jerry


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Re: [Talk-GB] SuDS (Sustainable Urban Drainage Systems)

[Jez Nicholson]

My client GeoSmart are experts on SuDS, further reading at
https://geosmartinfo.co.uk/knowledge-hub/sustainable-drainage-systems/

Many/most planning applications for new developments now have to mitigate
the drainage area that has been lost to houses/drives/roads/etc. It can be
difficult to identify a SuDS installation as they are deliberately blended
into the site. It might just be a pond at the bottom of a larger dipped
area that'll take some of the bite out of a flash flood.



On Wed, Jun 19, 2019 at 2:46 PM SK53  wrote:

> Last night before visiting the pub we had a look at part of Sheffield's
> "Grey-to-Green" SuDS system. Unfortunately all my batteries ad packed up at
> this point, but there are some decent pictures on twitter
> .
> The bit we looked at was outside the courthouses. It consisted of :
>
>- A bio-swale. Planted with a colourful mixture of plants most of
>which I've forgotten now, although I do recall Jerusalem Sage. The ground
>was a gravel mix with presumably a geo-membrane underneath to retain water.
>A few birches were also planted along the length of the swale.
>Superficially this just looks from a distance like a large ornamental
>flower bed.
>- Concrete 'dams' periodically, along the swale, rising to within a
>few inches of pavement level and with a v-shaped notch in the centre.
>Obviously these are not really dams, more a type of weir, being designed to
>moderate the flow of water through pooling behind each dam. I've seen
>similar constructions in the Alps albeit on a larger scale.
>- At the bottom of the swale a more obvious drainage channel. Where
>the swale is broken for pedestrian access this runs in a recessed gutter
>covered by a grille.
>
> There are probably other features of the completed scheme which we didn't
> see. I notice many new-build housing estates will have an area set aside as
> a water retention basin.
>
> I've previously noted a SuDS along Ribblesdale Road
> 
> in Nottingham, but the features involved are on too small a scale to
> consider mapping for now.
>
> This type of infrastructure is becoming much more popular, particularly
> with extreme flooding events due to surface run-off. I'd hoped to look at
> the one in Sheffield, and fortunately Laura both remembered this and where
> it was. Larger ones are relatively simple to map the main features,
> choosing viable & appropriate tags is more challenging. I've had a go
> , but am very
> open to other suggestions. I suspect the whole swale should be mapped as a
> waterway feature. For now I've used waterway=drain with intermittent=yes
> for the channel in the swale & the connecting part of the drain running in
> a covered gutter (one import in Santa Clara Co, CA opted for
> waterway=stream). However many of the features could use man-made rather
> than waterway tags.
>
> In conclusion: there's probably a SuDS near you; they're hard to tag (for
> know); but not too hard to map; we could do with thinking about better tags.
>
> Regards,
>
> Jerry
>
>
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> Talk-GB mailing list
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>
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[Talk-GB] SuDS (Sustainable Urban Drainage Systems)

[SK53]

Last night before visiting the pub we had a look at part of Sheffield's
"Grey-to-Green" SuDS system. Unfortunately all my batteries ad packed up at
this point, but there are some decent pictures on twitter
.
The bit we looked at was outside the courthouses. It consisted of :

   - A bio-swale. Planted with a colourful mixture of plants most of which
   I've forgotten now, although I do recall Jerusalem Sage. The ground was a
   gravel mix with presumably a geo-membrane underneath to retain water. A few
   birches were also planted along the length of the swale. Superficially this
   just looks from a distance like a large ornamental flower bed.
   - Concrete 'dams' periodically, along the swale, rising to within a few
   inches of pavement level and with a v-shaped notch in the centre. Obviously
   these are not really dams, more a type of weir, being designed to moderate
   the flow of water through pooling behind each dam. I've seen similar
   constructions in the Alps albeit on a larger scale.
   - At the bottom of the swale a more obvious drainage channel. Where the
   swale is broken for pedestrian access this runs in a recessed gutter
   covered by a grille.

There are probably other features of the completed scheme which we didn't
see. I notice many new-build housing estates will have an area set aside as
a water retention basin.

I've previously noted a SuDS along Ribblesdale Road

in Nottingham, but the features involved are on too small a scale to
consider mapping for now.

This type of infrastructure is becoming much more popular, particularly
with extreme flooding events due to surface run-off. I'd hoped to look at
the one in Sheffield, and fortunately Laura both remembered this and where
it was. Larger ones are relatively simple to map the main features,
choosing viable & appropriate tags is more challenging. I've had a go
, but am very open
to other suggestions. I suspect the whole swale should be mapped as a
waterway feature. For now I've used waterway=drain with intermittent=yes
for the channel in the swale & the connecting part of the drain running in
a covered gutter (one import in Santa Clara Co, CA opted for
waterway=stream). However many of the features could use man-made rather
than waterway tags.

In conclusion: there's probably a SuDS near you; they're hard to tag (for
know); but not too hard to map; we could do with thinking about better tags.

Regards,

Jerry
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