Talk:Lock (water navigation)

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When/where invented[edit]

Canal_of_the_Pharaohs says "Ptolemy II was the first to solve the problem of keeping the Nile free of salt water when his engineers invented the water lock around 274/273 BC" (not sure what type) but can't see any mention here. - Rod57 (talk) 23:19, 12 November 2015 (UTC)

Templates[edit]

I have added 2 templates to the article {{refimprove}} and {{tooshort}}. The latter was placed here on the talk page when it should have been on the article page, so I have removed it from here. The former has been added because for an article the size that it is, there are really very few references, and that gives a real feel of original research. It may be that this is all authoritative stuff, but it doesn't sound like that as there are insufficient references to support it. CalzGuy (talk) 06:49, 24 September 2016 (UTC)

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Double Gates.[edit]

The locks on the Panama canal, and the big new locks in Antwerp, have two sets of gates, with a gap of about 20m. between them. Why ?

On the Kennet and Avon canal, on the upstream side of Reading, there is a lock with a rise of only about 1 foot. why ?

78.150.128.87 (talk) 00:29, 15 August 2017 (UTC)

On the K&A you are referring to County Lock which IIRC is mainly used for level control rather than hill climbing. For Panama see Panama Canal locks#The gates. Martin of Sheffield (talk) 08:33, 15 August 2017 (UTC)
County Lock is on a river section, with appreciable flow. It's alongside a weir. Andy Dingley (talk) 09:10, 15 August 2017 (UTC)

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Reversion 25/1/18[edit]

I've reverted the last two changes for a number of reasons. The changes were well intentioned, but introduced a number of linguistic and factual errors.

  • The essence of a lock is navigation. Otherwise a staunch, gate or sluice would suffice.
  • Please check up on the use of an apostrophe. Plurals do not take one, only genitives.
  • Control locks or stop locks are still navigation locks, otherwise they would be sluices etc.
  • What are "Waaier" and "Spui" locks? It's not an English language term I've ever seen, and there is limited explanation and no wikilink. Are they instances of sluices?
  • Please also watch the use of headings. The highest level heading that should be used on a mainspace or talk page is level 2.

Having been rather negative so far, I will agree with you that control lock should be merged into this article and will set about doing so forthwith. Martin of Sheffield (talk) 13:40, 25 January 2018 (UTC)

Merger proposal[edit]

I propose that Control lock be merged into Lock (water navigation). The examples on Control lock can, if citations are found, be adequately merged into Lock. A redirect will ensure the edit history is preserved. Martin of Sheffield (talk) 14:09, 25 January 2018 (UTC)

  • Oppose the proposed target is already 90K and has too many sections. Splitting is therefore appropriate. Andrew D. (talk) 14:26, 25 January 2018 (UTC)

Some restructuring seems to be necessary. Maybe renaming the page to pound lock? and linking to the pages of the other types such as the control lock? Right now the other pages are quite hard to find and it is like the pound lock would be the only lock around.

Or even better, maybe making a page for lock that refers to the pound lock page (this page) and the other lock type pages.

I wanted to write about a lock design meant solely for the purpose to flood certain regions (these types of locks were for example used in the setting of the Hollandic Water Line) and the title of this, otherwise very well written, article got me confused.

--Danielvandermaas (talk) 18:56, 25 January 2018 (UTC)

Have you tried floodgate, Flood barrier, Tidal barrage or sluice? As the Hollandic Water Line article you referred to says: "Sluices were constructed in dikes", it does not call them locks. Martin of Sheffield (talk) 21:14, 25 January 2018 (UTC)

It seems that the design of door I want to describe is used for both control locks and sluices.

Many locks are used for both the raising/lowering of boats as well as controlling water levels. It does not seem right to split control lock and pound lock into two pages. The remark that a lock's main or partial function can be controlling water levels (as opposed to raising boats) should probably be stated in the introduction on the current lock page. --Danielvandermaas (talk) 08:26, 28 January 2018 (UTC)

  • Oppose merger It seems to me that Control lock and lock (water navigation) are distinct topics, related topics. Distinct topics with sufficient references, should remain standalone articles, for various reasons, including that this allows readers to put one topic's article on their watchlist, and not the other. Geo Swan (talk) 04:49, 8 February 2019 (UTC)
Closing, given that there seems to be there remains opposition after more than a year; no clear consensus other than, perhaps, for improve. Klbrain (talk) 06:15, 17 April 2019 (UTC)

Van gates[edit]

I have edited the section on van gates as the previous description didn't make sense. GBM (talk) 09:56, 13 February 2018 (UTC)

Basic construction and operation[edit]

I suggest that the diagram in this section omits the following steps and that the text in this section doesn’t sufficiently emphasise them:

For a boat travelling uphill, if the lock isn’t already empty, the lock will first need to be emptied
For a boat traveling downhill, if the lock isn’t already full, the lock will first need to be filled.

Given that these steps will be required about half the time a lock is traversed, I think inclusion/greater emphasis is required.

Thoughts? Zin92 (talk) 20:52, 13 June 2018 (UTC)

Depth of locks[edit]

I question the statement "The deepest "as-built" locks in England are considered to be Etruria Top Lock on the Trent and Mersey Canal and Somerton Deep Lock on the Oxford Canal: both have a rise of about 14 ft (4.3 m)".

I think this needs reliable source because this unreliable source does not support it:

  • "Deepest Canal Locks in England and Wales, UK". Pennine Waterways. Retrieved 12 March 2019.

PBS (talk) 12:45, 12 March 2019 (UTC)

The following unreliaable source puts the Somerton Deep Lock at 12 feet which is deep for the Oxford canal but the canals next to the river stour have a number of locks with a similar depth (see previous unreliable reference).

PBS (talk) 13:13, 12 March 2019 (UTC)