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Assessment of rip lines using CAESAR‐Lisflood on a trial landform at the Ranger Uranium Mine

The Ranger Mine in the Northern Territory of Australia is to be rehabilitated by 2026. The rehabilitated landform will require some form of erosion control, or surface amelioration to reduce water and sediment leaving the landform. One method of surface amelioration is the construction of rip lines. Rip lines have been used in both mining and agricultural environments to reduce surface water velocity, trap fine sediment and nutrients, and reduce erosion from the landform. However, there is little quantitative information on the extent to which rip lines influence erosion. In a desktop study using the CAESAR‐Lisflood landform evolution model, we assessed the effectiveness of rip lines by simulating the evolution of both ripped and nonripped surfaces on a range of slopes from 2% to 12% for simulated periods of up to 50 years.