The South Australian parliament's natural resources committee will take a group of irrigators on a tour of the lakes and surrounding areas, including the area where a weir may be built across the Murray.

The tour follows a trip by members of the committee to various upstream lakes and communities to assess conditions across the Murray-Darling Basin.

Committee member John Rau said 40 irrigators would join the tour and would discuss the current and future impacts of the ongoing drought.

"This is one small step towards cross-basin understanding," Mr Rau said.

"It is one small step to bringing the basin together.

"We cannot hope to solve everyone's problems but we can try to increase the sense of a basin-wide community of interest."

Mr Rau said he believed irrigators from Queensland, NSW and Victoria had a genuine interest in learning about the impact of the water crisis on their peers in South Australia.