The national regulating body NOPSEMA's decision to delay its decision relating to BP's application to drill for oil in the Great Australian Bight by 10 days is a welcome decision and should foreshadow a final, negative decision, the Australian Greens have said.

"What's needed now is a final rejection of BP's disastrous plan," South Australian Greens Senator Sarah Hanson-Young said.

"This decision will have an impact on generations of Australians and should not be rushed.

Following the release of explosive oil spill modelling from mining giant BP, their plans to drill for oil in the Great Australian Bight should be rejected, the Australian Greens have said.

"Here we have it, straight from BP themselves," South Australian Greens Senator, Sarah Hanson-Young said.

"The environmental and economic impact of a spill on the marine life, fisheries and tourism industry of South Australia would be absolutely devastating.

"BP's attempts to drill for oil in the Great Australian Bight should not be allowed to go ahead.

South Australian Greens Senator Sarah Hanson-Young will give notice today that she will introduce legislation to the Senate that would see the Great Australian Bight marine park protected from companies wanting to drill for oil and gas.

"The Parliament has to step in and make sure that this this national treasure is protected for generations to come," Senator Hanson-Young said.

"BP will put this spectacular marine park at risk and, if they're given approval, there are several other companies lining up behind them.

Astounding results from a Curtin University study, showing 172 southern right whales using the Great Australian Bight calving sanctuary in just one July day, show why the area must be protected from BP's plans to drill for oil there.

"This essential ecosystem must be protected," Senator Hanson-Young said.

"The extremely vulnerable southern right whale population is only just starting to rebound and for BP to be given clearance to drill for oil in the Bight would be an absolute disaster.

The Greens have today announced they will move for a Senate inquiry into the Murray Darling Basin Authority's draft plan when Parliament resumes next week so parliamentarians can scrutinise what is being proposed.

"We want an answer to the basic question why did the MDBA choose 2,750 GL when the science says the river system needs at least 4,000 GL," Greens' water spokesperson, Sen. Sarah Hanson-Young, said.

"The basin authority has yet to justify that figure.