Fine sediment sources in Conservation Effects Assessment Project watersheds

Gullies, a critical link in landscape soil loss: A case study in the subhumid highlands of Ethiopia

“…Also, the large number of mixed hysteresis loops (Figure ) at the outlet is related to the bank failures, meaning that there was always sediment available to be transported by runoff so elevated SSCs could be reached both on the rising and recession limbs of the hydrograph. Using sediment fingerprinting techniques, an increase in channel sources (specifically banks) relative to upland sources is shown (Kuhnle, Bingner, Alonso, Wilson, & Simon, ; Wilson et al, ; Wilson et al, ) during the recession of runoff for a variety of streams in the agricultural landscape of the United States. Therefore, both the sediment budget calculation and the hysteresis loop analysis demonstrated that gully erosion is the dominant sediment source erosion feature.…”

Factors controlling streambank erosion and phosphorus loss in claypan watersheds

“…) and in many instances it is the dominant source (Simon and Rinaldi 2006;Wilson et al 2008Wilson et al , 2014Schilling et al 2011;Willett et al 2012). Using bank erosion rates and upland erosion estimates, Willett et al (2012) showed that 79% to 96% of the total in-stream sediment load was attributable to streambanks in two agricultural watersheds within the Central Claypan Region of Missouri (these watersheds are also the focus of this study).…”

“…Using bank erosion rates and upland erosion estimates, Willett et al (2012) showed that 79% to 96% of the total in-stream sediment load was attributable to streambanks in two agricultural watersheds within the Central Claypan Region of Missouri (these watersheds are also the focus of this study). Wilson et al (2008Wilson et al ( , 2014 used radionuclide tracers to track the sources of eroded sediment in five Conservation Effects Assessment Project (CEAP) watersheds. These studies found that during each runoff event, sediment transport was mostly from channel sources (54% to 80%) as opposed to eroded surface soils, and in all sites but one, the channel sources were dominated by collapsed bank material.…”

A review of concentrated flow erosion processes on rangelands: Fundamental understanding and knowledge gaps

“…The temporal shift of erosion processes from interrilldominated at the start of erosion to channel-dominated in later stages of the erosive event has also been found by others (e.g., Liu et al (2011) and Wilson et al (2012)). The spatial scales at which erosion processes have been investigated with radionuclides varied from plot and hillslope (e.g., Jha, Schkade, and Kirchner (2015), Liu et al (2011) and Porto and Walling (2014)) to whole watershed assessments (e.g., Geeraert et al (2015), Gourdin et al (2014) and Wilson et al (2014)). Meteorically-delivered radionuclides such as Be-7 have less often been used in arid and semiarid environments as a short-term sediment tracer because low and highly variable precipitation regimes hinder reliable interpretation of radioactivity measurement (Kaste, Elmore, Vest, & Okin, 2011).…”