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Covered reservoirs?

I think a covered=yes/no would be useful

A reservoir near me is covered, within a park. I know I could set layers, but I think covered is a property like wood=coniferous/deciduous/mixed is a value of Tag:landuse=forest --LeedsTracker 13:46, 20 September 2008 (UTC)

I note man_made=reservoir_covered is on the Man_made page and in the JOSM presets. But the description for landuse=reservoir says it can be covered or uncovered. I started a thread on the talk list --LeedsTracker 14:10, 30 January 2009 (UTC)
covered=yes (default is no) is now an approved property.--turbodog 20:43, 21 December 2009 (UTC)
So how does landuse=reservoir + covered=yes + reservoir_type=water_storage differ from man_made=reservoir_covered? --Fkv 20:30, 27 January 2012 (UTC)
Given that man_made=reservoir_covered are for concrete tanks with lids, can someone provide an example of a covered reservoir? --DaveF63 (talk) 18:54, 4 November 2020 (UTC)

Decorative Ponds?

It's been popular in the US for residential developments to include a small pond, either within a landscaped park or in more natural settings. These ponds are managed as much as any other piece of landscaping, and in some parts of the country would go dry without water being pumped into them. They serve a primarily decorative purpose, and are not for water storage like a reservoir. Do we have an appropriate tag or combination of tags for this sort of thing? natural=water doesn't seem appropriate. Should a new tag be created? amenity=pond, perhaps? --DanHomerick 17:39, 24 September 2009 (UTC)

I use landuse=reservoir for decorative ponds because it's close enough and there isn't anything closer. I agree that natural=* would be inappropriate as these ponds are definitely not natural. See an example here. --T99 11:09, 18 July 2011 (BST)

Seasonal reservoirs?

Is there a way to tag that a reservoir is usually dry unless it rains a lot? --NE2 10:50, 8 January 2010 (UTC)

Tag:landuse=basin --Mueck 20:17, 9 May 2010 (UTC)
No, this doesn't drain into a river. It's a retention pond, but it's usually dry. --NE2 23:46, 9 May 2010 (UTC)
Now retention is rendered in Osmarender: Key:basin --Mueck 11:06, 14 June 2010 (UTC)

"natural=water" vs. the "Man made body of stored water" description

We've suggested natural=water as a supplementary tag for some time, which bugs me given that reservoirs are pretty much always man_made=* features. I guess there are cases where a reservoir is an only fairly minimally modified natural feature, so suggesting "Can be added if the reservoir is also a natural body of open water", correct or discuss if you see fit. --achadwick 12:31, 11 May 2011 (BST)

The water is natural. The hole in the ground that is partially filled with water may not be :) --NE2 01:39, 12 May 2011 (BST)

Tagging list discussion

The Tagging mailing list is discussing this page. [1] Mrwojo (talk) 18:12, 7 June 2013 (UTC)

  • There seems to be no problem in tagging the water part with water=reservoir but for some people the landuse includes more than only the water part like the dam and infrastructure. E.g. we still need a landuse=*. --Skyper 19:36, 25 June 2013 (UTC)
  • There are different kinds of reservoirs. These can be tagged with protected_area=* but for drinking water the primary landuse=* will still be the reservoir where as for flooding reservoir the primary landuse=* might be landuse=forest, landuse=meadow or landuse=farmland. --Skyper 19:36, 25 June 2013 (UTC)


reservoir_type=water_storage: does this mean:

  • Storing water for use, e.g., drinking water or irrigation water
  • A retention pond, slowing runoff so that very large storm drains don’t have to be built

The two are very different. Michael Z. 2016-09-20 20:55 z

There should really be a more defined use than just storage, I agree. Most reservoirs in Norway will be for hydro power or drinking. --Gazer75 (talk) 07:02, 16 October 2018 (UTC)

Seasonal reservoirs (part 2)

This refers to reservoirs that are primarily used for irrigation water storage. These can vary in level, many drying out completely in a dry season (common in India) or can retain some water all year round. Aerial imagery, especially in India, often shows them at a low level because such imagery is easiest to capture (dry season, few clouds, clear skies). Sometimes the marginal lands are cultivated during the dry season.

I've been marking them routinely at their normal high water level if this is readable from available imagery (though sometimes there is a flood level that is higher than this). Other reservoirs are marked at a lower level because that is all that is available in imagery. How should the difference be captured? I have sometimes in the past used a 'water=high-water' or similar mark, which of course is never rendered. Others have marked the seasonal part as 'wetland' though I think this is inaccurate in the normal sense of the word, wetland is usually flat land that is often under a shallow depth of water. Indigomc (talk) 09:28, 25 November 2018 (UTC)

It's also possible to map and tag the high water level with intermittent=yes. Some renderers and database users will show this area differently. --Jeisenbe (talk) 00:22, 22 September 2019 (UTC)

Clarifying reservoir_type


Given that OSMarender hasn't functioned for eight years, do any renderers make use of this tag?

As there's no descriptions, I'm unsure of some of the values meaning, but aren't 'sewage' covered by & 'evaporator' covered by (talk) 19:20, 4 November 2020 (UTC)