Talk:Lock (water navigation)

message: 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)
thread_title:  When/where invented 

message: I have added 2 templates to the article  and . 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)
thread_title: Templates

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thread_title:  External links modified 

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thread_title:  External links modified 

message: 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)
replies: text: 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)
replies: text:  County Lock is on a river section, with appreciable flow. It's alongside a weir. Andy Dingley (talk) 09:10, 15 August 2017 (UTC)
thread_title:  Double Gates. 

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified (January 2018) 

message: 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)
thread_title:  Reversion 25/1/18 

message: 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)
replies: text: * 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)

text: 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)

text: 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)
thread_title:  Merger proposal 

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

message: 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)
thread_title:  Basic construction and operation 

message: 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:
*
— PBS (talk) 12:45, 12 March 2019 (UTC)
replies: text: The Nicholson Guide volume 1 quotes 12 feet as the depth of Somerton Deep Lock, as does Paget-Tomlinson. I cannot find a sensible ref for the depth of Etruria top lock, so I propose removing the mention of "as-built" locks. Bob1960evens (talk) 13:19, 22 January 2024 (UTC)
thread_title:  Depth of locks 

message: I am moving the following uncited material here until it can be properly supported with inline citations of reliable, secondary sources, per WP:V, WP:CS, WP:IRS, WP:PSTS, WP:BLP, WP:NOR, et al. This diff shows where it was in the article. Nightscream (talk) 14:40, 26 April 2022 (UTC)
replies: text: Under the heading "Use of Water" there was about a page of material. With this 4/26/22 change, and to this day, 4/10/24, only two sentences remain. Many years ago, there had been an equation in the removed material. On March 13, 2016, I improved the equation, generalizing it. I won't both making such an effort again. 24.214.166.246 (talk) 14:36, 10 April 2024 (UTC)
thread_title: Uncited material in need of citations