Filters: Tags: Aggradation (X)
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Categories: Publication;
Types: Citation;
Tags: Aggradation,
Aggrading rivers,
Channel improvement,
Channeling,
Ecological effects,
The style and degree of channel narrowing in aggrading reaches downstream from large dams is dependent upon the dominant geomorphic processes of the affected river, the magnitude of streamflow regulation, and the post-dam sediment transport regime. We measured different magnitudes of channel adjustment on the Green River downstream from Flaming Gorge Dam, UT, USA, that are related to these three factors. Bankfull channel width decreased by an average of about 20% in the study area. In reaches with abundant debris fans and eddy deposited sand bars, the amount of channel narrowing was proportional to the decrease in specific stream power. The fan?eddy-dominated reach with the greatest decrease in stream power narrowed...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Geomorphology,
aggradation,
channel adjustment,
dams,
floodplains
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Catchments,
Climate change,
Computer simulation,
EE 444 Water Resources; EE 483 Soil Mechanics and Foundation,
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Alluvial Deposits,
Avulsion,
Channel Morphology,
Channels,
Categories: Publication;
Types: Citation;
Tags: *Arizona,
*Avalanches,
*Dry climates,
*Geologic history,
*Lakes,
Flood processes no longer actively increase the planform area of terraces. Instead, lateral erosion decreases the area. However, infrequent extreme floods continue episodic aggradation of terraces surfaces. We quantify this type of evolution of terraces by an extreme flood in May 1978 on Powder River in southeastern Montana. Within an 89-km study reach of the river, we (1) determine a sediment budget for each geomorphic feature, (2) interpret the stratigraphy of the newly deposited sediment, and (3) discuss the essential role of vegetation in the depositional processes. Peak flood discharge was about 930 m3 s− 1, which lasted about eight days. During this time, the flood transported 8.2 million tons of sediment...
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Coarsening-upward sequences,
Extreme fl
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Alluvium,
British Isles, North Yorkshire,
Catchment Areas,
Climatic Changes,
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Alluvial Deposits,
Alluvial fans,
Catchment Areas,
Dating,
Flood processes no longer actively increase the planform area of terraces. Instead, lateral erosion decreases the area. However, infrequent extreme floods continue episodic aggradation of terraces surfaces. We quantify this type of evolution of terraces by an extreme flood in May 1978 on Powder River in southeastern Montana. Within an 89-km study reach of the river, we (1) determine a sediment budget for each geomorphic feature, (2) interpret the stratigraphy of the newly deposited sediment, and (3) discuss the essential role of vegetation in the depositional processes. Peak flood discharge was about 930 m3 s− 1, which lasted about eight days. During this time, the flood transported 8.2 million tons of sediment...
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Coarsening-upward sequences,
Extreme fl
Categories: Publication;
Types: Citation;
Tags: Accretion,
Aggradation,
Climatic Changes,
Geologic History,
Geological Terraces,
Categories: Publication;
Types: Citation;
Tags: Accretion,
Aggradation,
Agriculture,
Alluvial deposits,
Carbon radioisotopes,
Categories: Publication;
Types: Citation;
Tags: Aerial photography,
Aggradation,
Channel flow,
Channel morphology,
Channels,
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Climate change,
Denudation,
Discharge (fluid mechanics),
EE 444 Water Resources; EE 444.1 Surface Water; EE 483.1 Soi,
Categories: Publication;
Types: Citation;
Tags: Antelope Mesa,
Hopi,
Navajo,
SW 0870 Erosion and sedimentation; SW 0810 General; Q2 02263,
USA, Arizona, Colorado Plateau,
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Bank stored water,
Biomass,
Dams,
Discharge (fluid mechanics),
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Alluvial rivers,
Bed level lowering,
Bridges,
Channelization,
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Catchments,
Climate change,
Computer simulation,
EE 444 Water Resources; EE 483 Soil Mechanics and Foundation,
Categories: Publication;
Types: Citation;
Tags: Aggradation,
Alluvial channels,
Bank stabilization,
Channel morphology,
Channeling,
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