But do you not see how the water issues are actually related? The catchments that do abut the GBR are not kept clean by regular water flow - meaning that when there is a major flood or storm, materials that would normally be absorbed by a green environment, are instead dumped - en masse during a flooding event - directly into our oceans. We've had a few major flooding events-worth of nutrient dumping in the last 20 years.
The cotton industry is buffering the problem - its not a direct cause - but it definitely contributes to the lack of local nutrient capture, which, when dumped, drastically effects our ocean water quality.
I think its important not to minimize the effect that altering Victoria/NSW's water table has on the waterway ecosystems.
This picture, straight from the horses mouth, shows you just how interdependent the waterways - and thus, the GBR - are:
https://cottonaustralia.com.au/assets/general/Landscapes-ima...