Perth Water Corporation rainfall pages maths disaster

While checking end of October rainfall numbers at Perth water supply dams – I looked in at 2.55am on 31st Oct and I saved this table with data as at 30 Oct. Interesting that as at end October – Canning, Mundaring, Serpentine Pipehead, South Dandalup and Wungong Dams all recorded over their annual rainfall with two months still to go – and there had been 86GL of inflows for the year. Churchmans Brook and Victoria Dams were way down on their rainfall – funny that Churchmans Brook is the only one of the seven sites to record to 4 decimal places? But back to the real world.
Golly I thought – all this rain must be causing smiles at WaterCorporation as they calculate the value to WA taxpayers of all that free rain falling from the sky. I imagined articles in The West Australian mentioning all this free water.
Later at 5.51pm on 31st Oct the numbers for that day were posted – and the numbers were little changed from the 30th – see Tables below.
I checked again at 6.04pm on 1st Nov and the data for 31st was still posted but there had been a couple of changes see Tables below. Inflows jumped to 89.3 GL – maybe a cloudburst somewhere.
Looking closer I saw the numbers for Victoria Dam going haywire see tables below.
Checking on 3rd Nov the crazy numbers for Victoria Dam had moved left as per Tables below copied off the 4 screens I saved. Quick comments on numbers marked with red X. The 670.0306mm is suspect because it is the only # to 4 dec places. The 576mm is sus because it is way lower than all others. The others for Victoria Dam are sus because they record multi-metres of rainfall that never happened.

Checking today the Table has updated to 8th Nov and numbers are exactly as per 3rd Nov.
The rain chart for Victoria Dam indicates water that could meet Perth supply needs without desalination.
So nobody at WaterCorporation can be watching – it must be that nobody at WaterCorporation cares in the slightest about rainfall.

2 thoughts on “Perth Water Corporation rainfall pages maths disaster”

  1. Nothing like pointless numbers when a shambles has been created.
    Back to rainfall reality.
    Looking forward to another end of year audit comparing WC and BoM data like last year?

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