Changeset: 36905641
added intermittend
Closed by Martin Borsje
Tags
created_by | JOSM/1.5 (9329 en) |
---|---|
source | PDOK |
Discussion
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Comment from Alecs01
Hi Martin, you marked hundreds of rivers/streams as intermittents (here and in some other changesets), are you sure? how did you check all of them? you mention PDOK as a source, what is that?
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Comment from Martin Borsje
Hi Alec.
Thanks for contacting.
First of all: the referred source PDOK is not correct; this is a Dutch topographic source which was still mentioned as a copy artefact in JSOM.
You are right that I did not have check all the streams that I added "intermittent" to.
But: I bike and kike already for over 15 years in around Lake Como and it region.
I noticed on OSM that many small streams were drawn on the map (possibly imported?), mapped as 'stream' or even 'river'.In fact by most of these small streams are intermittent and dry in the summer, execpt after heavy or long rainfall.
This by the conditions that:
- the intermittent streams do not have snow or groundwater as source
- the amount of rain in summer is quite low
- the temperature is high, which together with the vegetation, causes a lot of evaporative losses of water, so no rain water left in streams
- the ground in most of the area is quite permeable for water, which causes the most of the water disappear.
- the naming of the different streams as 'torrente' meaning mostly dry and only filled with water after heavy rain, winter snow melt.This to my observation when hiking and biking there, sometimes looking for cool water, that in fact nearly all of these streams are dry in summer, even after rainfall decided to map these as intermittent.
I do acknowledge that there is a very slight chance I have erroneously drawn intermittent on a continuous stream, but I judge that chance small.
But feel free if you know continuous streams, or even 'rivers' to remove the tag intermittent.
Cheers and thanks for your cooperation
Martin
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Comment from Alecs01
Thank you, good point. Most if not all waterways in Lombardy have been imported years ago, there could be small mistakes (I spotted a few) and the original data didn't have any information on seasonal streams as far as I know. As long as you know the area, that's fine for me. Cheers. Alessandro
- Torrente Valle Colmenace (229214646), v2
- Torrente Valle Colmenace (229214645), v2
- Torrente Valle Colmenace (56173473), v7
- Torrente Valle Fontana (229588850), v3
- Torrente Valle Fontana (229588846), v3
- Torrente Valle Fontana (229588852), v3
- Torrente Valle Fontana (56173940), v8
- Torrente Valle Gorla (56173245), v5
- Torrente Valle Nosè (88020218), v8
- Torrente Valle Nosè (294935507), v4
- Torrente Valle Perlana (265706025), v4
- Torrente Valle Pozzavalle (56172819), v6
- Torrente Valle Scura (58444161), v5
- Torrente Valle Tarola (56173924), v6
- Torrente Valle Valdolino (90068825), v8
- Torrente Valle Zelbio (88008637), v6
- Torrente Valle Zelbio (56173333), v7
- Torrente Valle del Merlo (58443838), v6
- Torrente Valle del Piletta (56174560), v8
- Torrente Valle del Piletta (90062314), v6
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