Storm Event Suspended Sediment-Discharge Hysteresis and Controls in Agricultural Watersheds: Implications for Watershed Scale Sediment Management

Environmental Science & Technology
Sophie C SherriffDaire Ó hUallacháin

Abstract

Within agricultural watersheds suspended sediment-discharge hysteresis during storm events is commonly used to indicate dominant sediment sources and pathways. However, availability of high-resolution data, qualitative metrics, longevity of records, and simultaneous multiwatershed analyses has limited the efficacy of hysteresis as a sediment management tool. This two year study utilizes a quantitative hysteresis index from high-resolution suspended sediment and discharge data to assess fluctuations in sediment source location, delivery mechanisms and export efficiency in three intensively farmed watersheds during events over time. Flow-weighted event sediment export was further considered using multivariate techniques to delineate rainfall, stream hydrology, and antecedent moisture controls on sediment origins. Watersheds with low permeability (moderately- or poorly drained soils) with good surface hydrological connectivity, therefore, had contrasting hysteresis due to source location (hillslope versus channel bank). The well-drained watershed with reduced connectivity exported less sediment but, when watershed connectivity was established, the largest event sediment load of all watersheds occurred. Event sediment export was el...Continue Reading

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Sep 2, 2011·Environmental Science & Technology·Patrick BelmontGary Parker

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Citations

Mar 27, 2018·Environmental Science. Processes & Impacts·Abha ParajuleeFrank Wania
Jan 19, 2018·Scientific Reports·Per-Erik MellanderChantal Gascuel-Odoux
Jan 23, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Jeffrey A LazarThomas J Fisher
Apr 30, 2017·Environmental Geochemistry and Health·Zhuo GuanBrian J Reid
Aug 29, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Simone MaluttaNadia Bernardi Bonumá
Mar 13, 2017·The Science of the Total Environment·Mairead ShorePhil Jordan
Feb 5, 2019·Journal of Environmental Management·Anna SmetanováYves Le Bissonnais
May 18, 2021·The Science of the Total Environment·Per-Erik Mellander, Phil Jordan
Jun 18, 2021·The Science of the Total Environment·H K M MihirangaS P Nissanka
Sep 29, 2021·Environmental Science & Technology·Amirreza Zarnaghsh, Admin Husic

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