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fneumann Sep 23, 2011 11:46 AM
Hello,
I wonder if the data in the dataset "Waterbase-Rivers-11" (http://www.eea.europa.eu/[…]/waterbase-rivers-7) is checked appropriately. Especially TP values with more than 2000 mg/l for the Czech republic and the similar Italian discharge values are questionable.
Was this dataset subjected to a quality control?
And Whom should I contact regarding this issue?
Best regards,
Franziska
Replies (1)
EEA Dec 15, 2011 09:35 AM
Dear Franziska,

First, an apology for the very late response!

Yes, the dataset has been checked. All outlier problems (as those in your example) detected during the quality assessment (QA) process, have been documented by flagging the records in the “QA_outlier” field. The information about individual tests performed during the QA and explanation of all QA flags, is provided in the QA documentation which is available for download from the same web page as the dataset (see Waterbase_Rivers_v11_QAdocument.pdf, at http://www.eea.europa.eu/[…]/waterbase-rivers-7

There are multiple reasons why the records have not been removed from the dataset. One is that we can’t be sure that those values are really incorrect until it is confirmed by the data provider, which hasn’t happened yet. We therefore keep them in the dataset and let the users decide whether they consider records flagged in the QA fields unusable for the purpose they need them for or not.

I hope this answers your question!

Best Regards
 
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