A flood risk consultant says local feedback about the March event, could lead to improved evacuation procedures in future.
Doctor Steven Yeo is gathering data about the floods for the Murray and Murrumbidgee State Emergency Services (SES) and to help local councils develop new flood management plans.
He says the March flood rose more quickly than the October 2010 event as there was less vegetation to hold up flows.
Doctor Yeo's asking people with rainfall data, pictures and information to contact their local SES.
"Data collection might sound rather boring and mundane but it can actually help inform future emergency management plans and flood warnings, flood evacuations, deployment of resources," he said.
"It can also feed into that longer term process that councils are initiating across the region."
Doctor Yeo says rainfall data is particularly interesting.
"More and more people are using their own automatic weather stations," he said.
"Daily rainfall is great.
"A gentleman at Lockhart has got the gauge stuck on his roof and it feeds into his computer and he's been able to provide us with rainfall at hourly intervals and that sort of information is pure gold."
The flood risk analyst says he is amazed at the Riverina's flood events over the last 18 months.
"The rarity of the flooding, it's just been amazing what's happened over the last few years," he said.
"Lockhart and The Rock 2010 was probably the highest floods on record.
"Certainly in Lockhart the 2010 flood was higher than the January 1934 flood and yet just 18 months later Lockhart and The Rock are experiencing higher floods."
© ABC 2012
17:25 EST With lots of talk about the cracker start to the grain growing season, there are plenty of farmers who've missed out on that precious rain.