Portal de Periódicos da CAPES

Timing and patterns of basin infilling as documented in Lake Powell during a drought

2008; Geological Society of America; Volume: 36; Issue: 11 Linguagem: Inglês

10.1130/g24733a.1

1943-2682

Lincoln F. Pratson, John E. Clark, Mark T. Anderson, Thomas P. Gerber, David C. Twichell, Ronald Ferrari, Charles A. Nittrouer, Jonathan Beaudoin, Jesse. Granet, John Crockett,

Hydrology and Sediment Transport Processes

Research Article| November 01, 2008 Timing and patterns of basin infilling as documented in Lake Powell during a drought Lincoln Pratson; Lincoln Pratson 11Nicholas School of the Environment, Duke University, P.O. Box 90227, Durham, North Carolina 27708, USA Search for other works by this author on: GSW Google Scholar John Hughes-Clarke; John Hughes-Clarke 22Ocean Mapping Group, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick E3B 5A3, Canada Search for other works by this author on: GSW Google Scholar Mark Anderson; Mark Anderson 33National Park Service, Glen Canyon NRA, P.O. Box 1507, Page, Arizona 86040, USA Search for other works by this author on: GSW Google Scholar Thomas Gerber; Thomas Gerber 11Nicholas School of the Environment, Duke University, P.O. Box 90227, Durham, North Carolina 27708, USA *Current address: ChevronTexaco Energy Technology Company, 1500 Louisiana St., Bellaire, Texas 77002, USA. Search for other works by this author on: GSW Google Scholar David Twichell; David Twichell 44U.S. Geological Survey, 384 Woods Hole Road, Quissett Campus, Woods Hole, Massachusetts 02543-1598, USA Search for other works by this author on: GSW Google Scholar Ronald Ferrari; Ronald Ferrari 55Bureau of Reclamation, P.O. Box 25007, Denver, Colorado 80225, USA Search for other works by this author on: GSW Google Scholar Charles Nittrouer; Charles Nittrouer 66School of Oceanography, University of Washington, P.O. Box 357940, Seattle, Washington 98195-7940, USA Search for other works by this author on: GSW Google Scholar Jonathan Beaudoin; Jonathan Beaudoin 22Ocean Mapping Group, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick E3B 5A3, Canada Search for other works by this author on: GSW Google Scholar Jesse Granet; Jesse Granet 33National Park Service, Glen Canyon NRA, P.O. Box 1507, Page, Arizona 86040, USA Search for other works by this author on: GSW Google Scholar John Crockett John Crockett 66School of Oceanography, University of Washington, P.O. Box 357940, Seattle, Washington 98195-7940, USA †Current address: San Diego State University Research Foundation, 5250 Campanile Dr., San Diego, California 92182, USA. Search for other works by this author on: GSW Google Scholar Geology (2008) 36 (11): 843–846. https://doi.org/10.1130/G24733A.1 Article history received: 11 Jan 2008 rev-recd: 08 Jul 2008 accepted: 19 Jul 2008 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Lincoln Pratson, John Hughes-Clarke, Mark Anderson, Thomas Gerber, David Twichell, Ronald Ferrari, Charles Nittrouer, Jonathan Beaudoin, Jesse Granet, John Crockett; Timing and patterns of basin infilling as documented in Lake Powell during a drought. Geology 2008;; 36 (11): 843–846. doi: https://doi.org/10.1130/G24733A.1 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 SocietyGeology Search Advanced Search Abstract Between 1999 and 2005, drought in the western United States led to a >44 m fall in the level of Lake Powell (Arizona-Utah), the nation's second-largest reservoir. River discharges to the reservoir were halved, yet the rivers still incised the tops of deltas left exposed along the rim of the reservoir by the lake-level fall. Erosion of the deltas enriched the rivers in sediment such that upon entering the reservoir they discharged plunging subaqueous gravity flows, one of which was imaged acoustically. Repeat bathymetric surveys of the reservoir show that the gravity flows overtopped rockfalls and formed small subaqueous fans, locally raising sediment accumulation rates 10–100-fold. The timing of deep-basin deposition differed regionally across the reservoir with respect to lake-level change. Total mass of sediment transferred from the lake perimeter to its bottom equates to ~22 yr of river input. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.