Repetitive media year after year from WaterCorp about low runoff into Perth dams – the propaganda never ceases

Rainfall data show that while rainfall has not decreased that much in 40 years –

runoff is drastically declining due to failure to manage catchment scrub.
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Link to graphic of monthly Perth dams runoff for a decade or so since 2000.
2015 media – 2014 media – 2013 media – 2011 media – blah blah

5 thoughts on “Repetitive media year after year from WaterCorp about low runoff into Perth dams – the propaganda never ceases”

  1. Failure to manage catchment scrub is a feature, so they have a reason to use the desalination plant instead, and feel good about themselves. (sarc)

  2. Warwick

    I posted about this last time you put up this graphic:

    “Warwick

    You cherry picked the start date of your graph.

    I took the same data set you took, patched the missing data with linear regression, and got an average of 907mm (compared to your 909mm).

    However, I went back to 1965 – when Karnet data is fully available. I’m sure you went back to then as well.

    The 10 years of data from 1965 to 1974 had an average of 1045mm

    The 10 years of data 2003 to 2012 had an average of 882mm.

    That is a decrease of 165mm per year or a 15% decline.

    The first dry year was 1975 – when you surprisingly started your graph. If you want to be taken seriously – why don’t you present the facts as they stand – rather than trying to manipulate your audience?”
    George
    Ed note – Replied last year –
    Western Australian Govt owned Water Corporation was wrong when in 2007 they said – “we can no longer rely on the rain” – 12 Mar 2014

  3. George what Warwick’s graph shows is that during a period in which rainfall has declined very little, runoff has declined significantly. There are two reasons for this, regrowth in previously cut over areas with no more logging and reduced prescribed burning. That is not cherry picking.

    There’s no doubt that the rainfall in SW WA has declined as the Antarctic Oscillation has gone into peak positive mode. you mightn’t think that it’s going to return, but I do. after all it’s called an oscillation. ( Also the SAM).

    If you want to look at low rainfall in the area in question, look at 1921.

  4. Hmmmmm – TedM

    Can you think of a third reason? I can – and Warwick can too!

    Hint – its at the end of the post that Warwick linked to.

    George

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