Transient hillslope erosion in slow evolution landscapes

Abstract

Transient evolution and adjustment to changing tectonic and climatic boundary conditions is an essential attribute of landscapes, and characterizing transient behavior is a key to understanding their dynamics and history. Developing new approaches

Tan DEM‐X Preserves the Relationship Between Hilltop Curvature and Erosion Rate in the Qilian Shan

“…Geomorphologists have used various terrain data sets to extract C HT . These terrain data sets have three levels of resolution: (a) fine resolution (1 m or less) (Gabet et al., 2021; Godard et al., 2016, 2021; Hurst, Mudd, Attal, & Hilley, 2013; Hurst et al., 2012; Mohren et al., 2020); (b) moderately coarse resolution (3 m) (Hurst et al., 2019); and (c) coarse resolution (10 m) (Clubb et al., 2020). All these studies were based on a single terrain data set, and comparative studies of terrain data with different resolutions in the same area are lacking.…”

“…Soil physical properties affect the efficiency of soil creep on hillslopes (Furbish et al., 2009), which in turn affects the hillslope morphology. According to the requirements of process‐based modeling, the linear relationship between C HT and erosion rate should have a fitting line passing through the origin (Gabet et al., 2021; Godard et al., 2016, 2021; Hurst et al., 2012; Mohren et al., 2020). However, the granite, metamorphic, and lithology complex groups do not meet this requirement; moreover, the linear fits for granite, metamorphic rocks, and complex lithology also failed the significance test.…”

“…When using fine‐scale terrain data to calculate curvature, the radius of the window should be large enough to filter out meter‐scale features (such as tree throw mounds) and small enough to avoid interference from ridge‐and‐valley signals (Godard et al., 2016, 2021; Grieve, Mudd, Hurst, & Milodowski, 2016).…”