Lockyer Valley residents, who bore the brunt of the inland tsunami that ripped through rural districts and small towns tearing their lives apart and leaving 17 people dead, are left with many questions despite the release yesterday of the Queensland Floods Commission of Inquiry’s interim report on flood preparedness.
Installation of more rain gauges high in the catchment linked to the Bureau of Meteorology to give the earliest possible warning of flooding and automatic sirens warning of sudden stream rises, as suggested by many flood survivors, have been welcomed.
So too have recommendations that the local creeks be cleared of the hundreds of tons of debris that have been left rotting in the creeks and choking the waterways.
A hydrological study into the effect of a large earthen wall around a creek pocket to protect a sand quarry from flooding has also been welcomed.
But the biggest question for people who lost family members and friends in the disaster on January 10: “why did they die?” has been left unanswered.
Importantly for many residents, finding out who is responsible for the deaths of people in their own homes, totally unaware that they and their children were in danger, is still a burning question that keeps them awake at night.
The finding that the Lockyer Valley Regional Council is not responsible for the deaths has left some residents distraught.
“Someone has to be responsible,” Grantham resident John Gallagher said.
Meanwhile, the police search for three remaining missing bodies continues.
New flood debris is still surfacing in farm dams. Local people who have seen so many victims of the flood buried know the excruciating pain endured by families whose loved ones are still missing.
They need to get them back and have a funeral.
Some of the most severely affected residents believe that absolving any organisation of blame so soon after the disaster and before any coronial inquests into the causes of death is premature and leaves the community vulnerable to the same catastrophic weather conditions in future possibly leading to the same raft of tragic consequences — lives lost and homes and livelihoods destroyed.
Locals point to a Facebook post by the council at 1.50pm on January 10 that “There has been some major flash flooding around the Murphys Creek and Withcott areas with water flowing heavily across the Warrego Highway at Withcott”.
They claim the council, which is responsible for warning of flash flooding, failed to connect that the huge amount of floodwater would threaten a town of hundreds of people.
But opinion is divided with other residents believing council could not have foreseen the disaster.
At the local shop, still working from a temporary building, owner Sandy Halliday has not had time to read the interim report and she doesn’t talk to customers about the flood because it’s still such an emotive and divisive subject.
“No one said anything about it. We try not to get into the sh-t,” she said.
Local flood volunteer Terri-Ann McLachlan who has distributed hundreds of thousands of dollars worth of private donations directly to more than 50 flooded families, said opinion was divided on the usefulness of the report.
“It’s all a bit too late but anything would be better than nothing. People who have lived through it are more aware,” she said.
“Any water that comes now and they are going to get out. They are going to run for it without trying to save their possessions and animals.”
“The council is going to put in flood gauges with alerts, but what level is too high?” she asked.
Residents of Grantham and farmers upstream of the town have welcomed the appointment by the Flood Commission of hydrologist Dr Philip Jordan to create a hydrological model to determine the possible effect of a sand and gravel quarry, on the flow of the huge volume of 4000 cubic metres per second of water down Lockyer Creek as it headed for Grantham.
Dr Jordan has recently spoken with residents who live on farms around the quarry, gathering information from witnesses who fled on the day of the flood when they saw floodwater begin to pour over the quarry wall and gush metres deep across their farms.
His findings are not included in the interim report.
While residents have welcomed the hydrology study, they also want the Flood Commission to return to the town and hear directly from the many people who saw what happened on the day.
Dozens of people in the centre of the disaster zone are still living in sheds, shipping containers, buses and flood-damaged houses. They were so busy patching back together what was left of their lives and properties that they could not make submissions to the inquiry.
They have not yet been heard and there are no plans for any further hearings of the inquiry in Grantham.
Local resident John Gallagher is waiting for the hydrology study findings, since his property had never been flooded before, even in the record 1974 flood.
“I don’t put a lot of faith in early warning systems. There was no time. We need the creek not to get out of the creek,” he said.
Had the creek remained in its channel, Gallagher believes, the flood in Grantham would have been a “slow flood”, giving people time to escape. It would not have been a violent deadly one.
*Read Amber Jamieson’s rundown of the inquiry findings in “Tide of blame over Queensland floods” here.
28 thoughts on “More answers needed in the Lockyer Valley”
Bob the builder
August 2, 2011 at 10:23 pmBEETWO77,
thank you for your very considered and erudite contribution – much better reading than my screed!
…but. What do you think about the land-clearing issue? I heard one brief mention at the time (on a Crikey comment) of this issue (as perhaps demonstrated by the colour of much of the floodwater), but otherwise if seems to have been ignored. Be very interested in your professional opinion of the effect of catchment deforestation on flood intensity and/or magnitude.
SBH
August 2, 2011 at 11:04 pmagain Suzanne attacks the ‘bureaucrats’. cowardly, they can’t defend themselves. Wrong, under a Westminster democracy they are not responsible. I bet people with your notions have never run a successful government or ever will. Get under the bridge, troll – the grown ups are talking.
beetwo77
August 2, 2011 at 11:30 pmHi Bob,
there are certainly benefits to increased vegetation in flood plains. In general terms would more vegetation reduce the severity of flooding, the answer is likely to be yes. The vegetation acts as a restriction to flow, slowing down the movement of water. But reducing speed causes an increase in depth. You can’t escape physics.
So it is likely that increased vegetation would have reduced the peak intensity of the flash flooding but increased the overall duration of flooding. It is possible but unlikely that this would have made enough of a difference to prevent the deaths that were experienced.
That is not to say there isn’t value in it though. I’ll go with the a common catch phrase that goes around these days, if you have a diverse portfolio of risk management measures you might succeed i.e. more vegetation, well placed structural changes such as levies, improved building standards and development control, improved models, early warning systems etc etc.
I think thats where all of this will get to. Pointless exercise trying to single out decisions by individuals. I doubt anyone will be found to be culpable and I truly do appreciate that people who have lost loved ones want some answers but as I think most discerning Crikey readers now, the world is full of compromise, there is no such thing as a perfect system and this is the cost of the benefit gained by not investing in all of the above mentioned activities over the years.
Its nice for a change to be able to comment on something you understand rather than following vaguely along with the political debate and grappling with issues beyond my background.
I think that many people, especially those with a right leaning who perhaps have never worked for a government entity, seem to think that the bureacratic processes are all bad and always produce the wrong decisions. I don’t share the view that this is all bad. I’ve worked with private industry and worked in an autocratic environment. They are just as prone to bad decisions and generally less open to negotiation and scrutiny. I’m sure many will argue this is better suited to emergency type situations. I’ll let the record of the worlds armed forces answer that question for me as I’m not convinced.
Bob the builder
August 2, 2011 at 11:53 pmBEETWO77,
re: vegetation. Does increased vegetation mean the water slows enough to infiltrate more, so somewhat negating the depth vs. severity equation? Or is the ground so saturated at this point that it can’t take more water? I’ve understood that much flash flooding is due to sheet flow (if that’s the correct term) and that consequent localised flooding (i.e. in Brisbane) is to some extent caused by the sheet flow, at a macro level, accumulating quickly at lower elevations/bounded areas.
beetwo77
August 3, 2011 at 1:19 amHi Bob,
I would imagine that in the storms that occurred in January, the ground was already saturated when the worst of it struck and the effect of vegetation would have been negligible in terms of reducing the volume of runoff. In smaller events though you are spot on about more water being removed from the soil by the plants than if the soil was cleared of vegetation generally speaking.
The vegetation may have acted partially to slow the water but again I don’t know the specifics of the catchments etc suffice to say that in a ‘steep’ catchment, the effects of obstructions are less than in a flatter catchment. Judging by the amounts of time between rainfall and flash flooding described in report, there must be some steep catchments. Flash flooding is usually regarded as occurring within 6 hours of the event. The report is talking about less than an hour between intensity in rainfall picking up and some of the terrible flooding events.
The flash flooding in the lockyer valley with flood depths of 12 m plus in some rivers is definitely not in the sheet flow category 🙂 Sheet flow is slow and shallow and this is what occurs in the flood plain as you said spreading out from the Brisbane river and inundating the city.
I should stop rambling on about it and shutup. I will point out that I do a range of hydraulic and hydrological modelling, not just rivers so I’m not an expert but have a decent understanding. Feel free to correct me anyone.
Have a read of this document…
http://lwa.gov.au/files/products/river-landscapes/px061170/px061170-chapter-5.pdf
It discusses revegetation impacts and describes most of the river hydraulics issues better than me. I should say that the catchments examined I don’t think sound like those where the flooding occured. The report points out that generally in steep catchments or where the depth of flow is great, the impacts of vegetation tend to disappear. If you can imagine if depth of flow is shallow, grass may have a large impact. If depth of flow is 10+ m, grass will have basically no impact. Trees may however have an impact, but only once flow spills onto the banks.
Suzanne Blake
August 3, 2011 at 7:51 am@ SBH
They and the Ministers will get an opportunity to defend themselves in the likely court cases that start.
SimsonMc
August 3, 2011 at 1:04 pm@ Beetwo77
Don’t stop rambling on. I very much enjoyed and appreciated your contribution. We need more people like you to contribute to debate rather than the pathetic trolls that clog up blogs for the pleasure of their repective masters.
Again – Thank you, ver much appreciated.
Frank Campbell
August 4, 2011 at 1:49 pm“But the biggest question for people who lost family members and friends in the disaster on January 10: “why did they die?” has been left unanswered.”
All reminscent of Black Saturday. It took a Royal Commission to dig out most of the truth…
In a phrase, institutional failure.