Several subjects to be covered/touched on/updated in this important contested area flooded with Gov funded misinformation.
A – The usually reliable Dwellingup 9538 failed to record rain on 31March when radar shows ~50mm fell.
www.bom.gov.au/products/IDW60801/IDW60801.94620.shtml
Long term readers here should know that over a decade ago I constructed my “Perth Dams Catchments May-Oct Rainfall Index” series from three stations – Mundaring Weir 9031, Karnet 9011 and Dwellingup 9538. In recent years BoM has discontinued Mundaring Weir 9031(see C below) so I have replaced that with Mundaring 9030. I have been well aware that Karnet 9111 has been getting worse and may have to look for an alternative site (see B below). My last update of my “Perth Dams Catchments May-Oct Rainfall Index” series is to year 2021 and I still have to do the work to update 2022.
2021 update 47 years Perth dams catchment May-Oct rain index 4Aug2022
www.warwickhughes.com/blog/?p=6960
Here is best link to my full 2021 chart.
www.warwickhughes.com/agri16/per-dams-catch-index2021.jpg
B – The patchy and unreliable Karnet 9111 turned in an obviously gappy & incomplete 2022 total. Seemingly accepted by BoM.
www.bom.gov.au/jsp/ncc/cdio/weatherData/av?p_nccObsCode=136&p_display_type=dailyDataFile&p_startYear=2022&p_c=-16612931&p_stn_num=9111
Why Karnet 9111 should be so unreliable I fail to understand as it is near a State run prison where there would be no shortage of labour to reliably curate rainfall gear.
I might have to include the well curated Bickley 9240 into my “Perth Dams Catchments May-Oct Rainfall Index” series to replace Karnet.
C – BoM has killed off in recent years several unreliable rain stations down the line of Perth dams – see previous blog
BoM chooses not to explain Perth dams faulty rainfall data 23Jul2018
www.warwickhughes.com/blog/?p=5871
D – All the above & below subjects mesh with my Muja blog where I expose the “barking mad” claim by ABC/BoM/ANU Academic that Muja Power Station 9738 rainfall was really as low as 124/127mm for calendar 2022.
ABC sucked in by obvious rainfall errors at Muja Power Station a BoM site 1Jan2023
www.warwickhughes.com/blog/?p=7061
E – The ever GreenLeft Our/ABC after Christmas 2021 published this arm-waving twaddle –
Why WA’s south-west is drying out at one of the worst rates in the world 28Dec21
www.abc.net.au/news/2021-12-28/why-south-west-wa-is-drying-out/100625142
And for your interest while on the subject of “arm-waving twaddle” – I see these glossed-up wild claims.
Guided by nature – Indigenous Australians use their deep spiritual connection to the land to track the seasons, but elders are warning of a “massive shift” in climate. 31Mar23
www.abc.net.au/news/2023-03-31/indigenous-australian-seasons-guided-by-nature/100919396
F – I have various blogs and www pages over more than a decade exposing the WA Gov and Water Corporation dodgy claims that rainfall decline has caused streamflow into dam catchments decline. In fact decades of neglect of scientific “control or thinning of excessive catchment bush” is the main cause of any runoff decline.
No water shortage forced seawater desal on Perth 27Feb2018
www.warwickhughes.com/blog/?p=5608
see link to – There never was a rain shortage to justify seawater desalination for Perth’s water supply 4Dec2007
www.warwickhughes.com/blog/?p=145