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In 2003, the Lost Creek fire burned 21,000 ha of nearly contiguous crown land forests in the headwater regions of the Oldman River Basin, Alberta. Seven small watersheds with various levels of land disturbance (burned, post-fire salvage logged, unburned) were instrumented and monitored for four years to measure stream discharge, sediment concentration, and sediment yields for a range of dominant flow periods characteristic of the region (baseflow, spring melt, and stormflow). Stream discharges reflected runoff regimes consistent with high regional precipitation and the high relief physiographic setting of the study area. Suspended sediment concentrations and yields were significantly higher in both burned and post-fire salvage logged watersheds than in unburned watersheds and were strongly influenced by topographic and hydro-climatic controls. Sediment availability was much higher in both the burned and post-fire salvage logged watersheds but it varied strongly with flow condition, particularly during the snowmelt freshet and high flow events. Because of increases in wildfire frequency and severity over recent decades, understanding the range of impacts from both wildfire and post-disturbance management strategies such as salvage logging is likely to become increasingly important for land managers. 相似文献
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Sediment source fingerprinting: benchmarking recent outputs,remaining challenges and emerging themes
Collins Adrian L. Blackwell Martin Boeckx Pascal Chivers Charlotte-Anne Emelko Monica Evrard Olivier Foster Ian Gellis Allen Gholami Hamid Granger Steve Harris Paul Horowitz Arthur J. Laceby J. Patrick Martinez-Carreras Nuria Minella Jean Mol Lisa Nosrati Kazem Pulley Simon Silins Uldis da Silva Yuri Jacques Stone Micheal Tiecher Tales Upadhayay Hari Ram Zhang Yusheng 《Journal of Soils and Sediments》2020,20(12):4160-4193
Journal of Soils and Sediments - This review of sediment source fingerprinting assesses the current state-of-the-art, remaining challenges and emerging themes. It combines inputs from international... 相似文献
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