Summer V NonSum
AN OBSERVATION OF THE CONFLUENCE OF STATISTICAL ABERRATIONS, DAM RATIOS, TIMING AND UNCOMMON RAINFALL EVENTS THAT COMBINED TO HAVE OUR LEADERS DRAW INCORRECT CONCLUSIONS. THEIR INFLUENCE ON ACTIONS TAKEN.

Author : J. V. Hodgkinson F. C. A. Chartered Accountant : Aug 2006 to November 2013    

The principal thrust of this website is
FLOOD PROOFING BRISBANE from damaging floods to the point of extinction. MITIGATING flooding in Ipswich and Gympie. Putting REAL MEANING into "Drought proofing SEQ" and ensuring our water supplies by natural means well into the future

This is my review based on official statistics and documents. It is done in conjunction with Ron McMah, grazier of Imbil and Trevor Herse, retired of the Gold Coast

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May 2009 : There is no change to this section since August 2007


SEQWater has by inference indicated that Summer Summer Rain Courier Mail 10 02 7.jpg (371046 bytes)Rainfalls were the main areas for high inflow into the Wivenhoe and Somerset Dams, uncommon events excluded.

They nominated three Rainfall Stations, two in the Wivenhoe and one in the Somerset.

They are correct. Attached is a summary of all the recording Stations in the Dams, some dating back to Summer V Non Sum Percent.jpg (197951 bytes)the 1880's. The Summer rains have without fail registered 50% or better in the 4 Summer months December to March. The balance, of course, was received in the non-summer months.

Almost all high impact rainfall that creates inflow was received in the Summer months. There are a few notable exceptions and attention is drawn to them where required.

The information is split into two sections. Rainfall up to 1964 and rainfall after that date. There is a slight variation between the two that do not alter the point of this exercise. I have referred to it in the "Climate Change" button.

Mary Valley ( Proposed Traveston Dam ) adjacent catchment area.

The Bureau of Meteorology rainfall statistics for the Mary Mry valey station numbers 65 to 06.jpg (229680 bytes) Valley to the proposed Traveston Crossing are enclosed. They show that the four Summer Months exceed the eight non-summer months.

 

This is not surprising as the Mary Valley experiences the Mary valley compare Somerset BOM figures.jpg (238533 bytes)same rainfall pattern as the Somerset/Wivenhoe system. This has important consequences when dealing with "uncommon events".

 

CONCLUSION

The consistency of the data as between rainfall Stations and periods has facilitated the comparisons in both Dams dating back several years to the early 1900's.

It had a major effect on determination of the cause of our depleted dams in the years 2001 to 2006.

The Summer Rains, with the exception of uncommon events, have produced almost all the inflows into the Dams. There are minor, but some important exceptions usually on the edge of the non-summer months namely April /October /November.

Summer Rainfall has been used throughout the web-site and the exceptions that occurred in the non-summer months noted where applicable.