Comparing methods for calculating channel steepness index

Channel steepness index, ks, is a metric derived from the stream power model that, under certain conditions, scales with relative rock uplift rate. index property of rivers, which can be relatively easily extracted digital elevation models (DEMs). As DEM data sets are widely available for Earth and becoming more readily other planetary bodies, channel represents powerful tool interpreting tectonic processes. However, multiple approaches to calculate exist. From this several important questions arise; does choice approach change values so different that influence findings study, better than others? With aid synthetic river profile case study Sierra Nevada, California, we show vary over orders magnitude according methodology used in calculation. We explore limitations, advantages disadvantages key calculating find choosing an appropriate relies on context study. Given these observations, it authors acknowledge ensure results contextualised reproduced.