The Murray River has agricultural and other non-point nutrient sources, industry and urban areas raising interest among researchers, industry and the environmental regulatory community. The environmental impact of the barrages (dykes) built in the Murray River Estuary is an area of ongoing study. 

The Murray River (or River Murray) is Australia’s longest river, at 2,508 kilometers (1,558 mi) in length. The Murray rises in the Australian Alps, draining the western side of Australia’s highest mountains, and then meanders across Australia’s inland plains, forming the border between the states of New South Wales and Victoria as it flows to the northwest into South Australia. It turns south at Morgan for its final 315 kilometers (196 mi), reaching the ocean at Lake Alexandrina. Lake Alexandrina is believed to have historically alternated between being open or closed to the Southern Ocean. A number of barrages (dykes) with locks have been built in the estuary to control salt water intrusion, but which have had significant ecological impacts (Wikipedia). 

Summary of Grid: This model grid contains 19,525 cells, with an average orthogonal deviation of 0.98 degrees. The grid stretches from Wellington in South Australia to the Southern Ocean. This grid was built in multiple stages and joined to together to make one complete grid in EFDC+ Explorer and Grid+.