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- W2582465530 abstract "Research Article| August 01, 2017 Channel Geomorphic Evolution After Dam Removal: Is Scale Important? Timothy Land; Timothy Land Department of Geosciences, East Tennessee State University, Box 70357, 325 Treasure Lane, Johnson City, TN 37614 Search for other works by this author on: GSW Google Scholar Arpita Nandi; Arpita Nandi 1 Department of Geosciences, East Tennessee State University, Box 70357, 325 Treasure Lane, Johnson City, TN 37614 1Corresponding author. Search for other works by this author on: GSW Google Scholar Ingrid Luffman Ingrid Luffman Department of Geosciences, East Tennessee State University, Box 70357, 325 Treasure Lane, Johnson City, TN 37614 Search for other works by this author on: GSW Google Scholar Author and Article Information Timothy Land Department of Geosciences, East Tennessee State University, Box 70357, 325 Treasure Lane, Johnson City, TN 37614 Arpita Nandi 1 Department of Geosciences, East Tennessee State University, Box 70357, 325 Treasure Lane, Johnson City, TN 37614 Ingrid Luffman Department of Geosciences, East Tennessee State University, Box 70357, 325 Treasure Lane, Johnson City, TN 37614 1Corresponding author. Publisher: Association of Environmental & Engineering Geologists First Online: 15 Nov 2017 Online Issn: 1558-9161 Print Issn: 1078-7275 © 2017 Association of Environmental & Engineering Geologists Environmental & Engineering Geoscience (2017) 23 (3): 209–220. https://doi.org/10.2113/gseegeosci.23.3.209 Article history First Online: 15 Nov 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Timothy Land, Arpita Nandi, Ingrid Luffman; Channel Geomorphic Evolution After Dam Removal: Is Scale Important?. Environmental & Engineering Geoscience 2017;; 23 (3): 209–220. doi: https://doi.org/10.2113/gseegeosci.23.3.209 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEnvironmental & Engineering Geoscience Search Advanced Search Abstract Post–dam removal geomorphologic adjustment of a stream channel has been documented in the scientific literature at watershed, hillslope, and laboratory scales. Hillslope-scale studies in channel cross sections are most common and add significant value in the dam-removal literature. This study examines geomorphic stream channel adjustment following dam removal at the hillslope scale under natural climatic conditions. A sediment-filled silt fence dam (1 m tall, 12.65 m wide) was removed in three stages, and the width and depth of the upstream developing channel was monitored at six transects for 15 months. Headcut retreat and changes in channel sinuosity were also recorded. After the silt fence dam was removed, channel development was initiated by headcut formation, which migrated upstream at a rate of 4 cm/d for about 10 months and then gradually reached attenuation. The channel progressed through four distinct stages: Stage 1 (Initial conditions); Stage 2 (Downcutting)—wide, shallow, meandering channel incised to a maximum depth of 0.52 m, and sinuosity decreased; Stage 3 (Floodplain development)—upon reaching base level, surface runoff began to meander within the channel, widening it through bank slumps and erosion; and Stage 4 (Quasi-equilibrium)—channel development reached dynamic (quasi-) equilibrium with only minor widening at downstream transects (maximum width of the incised channel reached 0.46 m), accompanied by sediment aggradation. The stages of upstream channel development and headcut retreat pattern in this study are consistent with the findings of other studies at the laboratory and watershed scales, indicating that channel development after dam removal is scale independent. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2582465530 title "Channel Geomorphic Evolution after Dam Removal: Is Scale Important?" @default.
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