Irrigation and waterworks authority flushing seawater out of Chao Phraya River

[webfact]

Irrigation and waterworks authority flushing seawater out of Chao Phraya River

 

 

The Metropolitan Waterworks Authority (MWA) and the Royal Irrigation Department (RID) have jointly employed a technique, called “water hammer”, to flush seawater out of the Chao Phraya River in their bid to maintain the quality of tap water.

 

MWA governor Prinya Yamasit said Sunday that the technique, which is on trial, has worked to a certain extent in reducing salinity of river water, which is used to produce tap water for Bangkok and its suburbs.

 

He assured that the MWA and the RID have been closely monitoring the intrusion of seawater into the river and have been working out appropriate measures to manage the production of tap water.

 

Full story: https://www.thaipbsworld.com/irrigation-and-waterworks-authority-flushing-seawater-out-of-chao-phraya-river/

 

-- © Copyright Thai PBS 2019-12-30

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[legend49]

Water hammer: a fleet of small boats abreast that are running their engines flat out pushing the salt back to the sea. LOL.

[marko kok prong]

Maybe a huge gang of labourers pounding the water with sledge hammers?

[Srikcir]

6 hours ago, webfact said:

employed a technique, called “water hammer”, to flush seawater out of the Chao Phraya River in their bid to maintain the quality of tap water.

Without an extensive analysis (of which there's no mention) as to the vectors involved in salt water intrusion (ie., http://www.coastalwiki.or/wiki/Seawater_intrusion_and_mixing_in_estuaries#Dispersion_by_tidal_pumping)

the water hammer technique is pure guesswork and more or less a random solution for a scientific problem.

For example, salt water is heavier than fresh water and so the latter might float above the salt water layer instead of being intermingled. Push the salt water layer out of the river and one might also be pushing fresh water out as well; or displace the salt water elsewhere within the statuary or basin where it wasn't present!

The Chao Phraya River and related water-fed aquifers need to be MODELED first after collection of salt water intrusion data throughout the year (account for possible seasonal variations). Then test various techniques using dye/PH tracking and densometers to gauge results.

For example see "Modelling Actual and Future Seawater Intrusion in the Variconi Coastal Wetland (Italy) Due to Climate and Landscape Changes," (2019): https:www.mdpi.com.

The model shows how density dependent flows are needed in predicting salinization distribution and sources for the next future. The model integrates hydrogeological, geomorphological and stratigraphical information to create a three-dimensional groundwater and transport model to quantify the different sources of salinization at the site.

Does that study compare to what the Thai government is proposing?

 

[hotchilli]

1 hour ago, Srikcir said:

Without an extensive analysis (of which there's no mention) as to the vectors involved in salt water intrusion (ie., http://www.coastalwiki.or/wiki/Seawater_intrusion_and_mixing_in_estuaries#Dispersion_by_tidal_pumping)

the water hammer technique is pure guesswork and more or less a random solution for a scientific problem.

For example, salt water is heavier than fresh water and so the latter might float above the salt water layer instead of being intermingled. Push the salt water layer out of the river and one might also be pushing fresh water out as well; or displace the salt water elsewhere within the statuary or basin where it wasn't present!

The Chao Phraya River and related water-fed aquifers need to be MODELED first after collection of salt water intrusion data throughout the year (account for possible seasonal variations). Then test various techniques using dye/PH tracking and densometers to gauge results.

For example see "Modelling Actual and Future Seawater Intrusion in the Variconi Coastal Wetland (Italy) Due to Climate and Landscape Changes," (2019): https:www.mdpi.com.

The model shows how density dependent flows are needed in predicting salinization distribution and sources for the next future. The model integrates hydrogeological, geomorphological and stratigraphical information to create a three-dimensional groundwater and transport model to quantify the different sources of salinization at the site.

Does that study compare to what the Thai government is proposing?

 

Don't expect the Thai officials to acknowledge your masterpiece in effective water management.
It contains about 1,000 words too many!!

[Cake Monster]

Water Hammer is the result of an Air Lock in a Water Pipe Delivery System.

From the Photo above, there are distinctly 2 water flows entering into One flow.

The one to the top resembles Water in colour, but the other one resembles  ????, and Tap Water is filtered from this filth