Marcos if you look to the data available on SNIRH for the Tagus estuary there are values of total alkalinity of 831 mg/L = 8300 µmol/L which converting to µmol/kg will be on the same order of magnitude as the ones you are searching.

Cheers

Bernardo Duarte

Thank you Bernardo. I'll have a look at the values.

Cheers

Hello,

In the Scheldt estuary (Belgium-The Netherlands) you typically have alkalinity exceeding 2.5 mM. See for exemple the paper  by Abril and Frankignoule (2001) in Water Research 35, No. 3, pp. 844-850 (freely downloadable).

There is also a database (in Dutch...) with more recent values here:

http://www.scheldemonitor.org/dataportal/index.php?searchPar=639&iscol=true#

Go to "physische parameters", choose "Alkaliniteit", choose zone "westerschelde" (downstream part of the estuary - lower values) or "zeeschelde"(upstream part of the estuary-higher values) - then select "filter data" and data will be displayed as a table (you can also download them)

Hope this helps

Thanks Natacha! I'll you check the paper and database.

Cheers.

Thank you Natacha and Bernardo. The work is now complete:

http://www.cbmjournal.com/content/10/1/2