Author: John Charles WallisPublisher:
ISBN:
Category : Alluvium
Languages : en
Pages : 278
Book Description
Evidences of climatic change from fluvial geomorphology and alluvial soils of the Colorado River, Texas
Author: John Charles WallisPublisher:
ISBN:
Category : Alluvium
Languages : en
Pages : 278
Book Description
The Colorado River Basin and Climatic Change
Author: Linda L. NashPublisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 140
Book Description
Late Quaternary Geomorphic Evolution of the Colorado River, Bastrop and Fayette Counties, Texas
Author: Robert Michael LooneyPublisher:
ISBN:
Category : Colorado River (Colo.-Mexico)
Languages : en
Pages : 0
Book Description
Ancient and modern flood plain and channel morphology was mapped in the late Quaternary alluvial valley of the Colorado River between Utley and La Grange, Texas. The analysis of N.A.S.A.-generated color aerial infrared photography, SKYLAB remote sensing imagery, and aerial panchromatic photography revealed nine assemblages of fluvial channel patterns. The paleochannels occur on multiple flood plain and terrace levels and are associated with deposits with variable textures, sedimentary structures, and lithologic composition. Quantitative geomorphic analysis showed that bankfull width for the late Quaternary Colorado River varied from 450 m to 200 m, meander wavelength from 575 m to 1730 m, and sinuosity from 1.3 to 3.6. The channel adjustments from low sinuosity to high sinuosity streams was accompanied by a decrease in meander wavelength and bankfull width. Sedimentological analyses show corresponding changes in grain size from sand and gravel to sand and silt transporting streams. The nine channel assemblages of the Colorado River reflect changes in runoff and sediment load characteristics from upstream catchment areas. These runoff and sediment load changes correlate with an alternating arid-humid climate in central Texas during the late Quaternary. The resulting hypothesis is that channel 7 is pre-Wisconsinan; channels 6, 6A, and 6B are Wisconsinan; channel 5 is a dry period at the beginning of the Holocene; channel 4 is a humid Holocene phase; and channel 3 to the modern channel are the most recent Holocene fluctuations. Sedimentary structures and paleo-hydrologic implications indicate that channels 7 and 6 were laid down by broad, shallow braided streams, Channels 6A and 5 were either braided or coarse meander belt fluvial systems. The small channel width, meander wavelength, and low sinuosity indicates that channels 6B and 4 operated as fine grained meander belt fluvial systems. Channels 3 and 2 are similar to the modern Colorado River which is a bed-load (high bed-load/discharge ratio) stream transporting coarse sand and pebble-to-cobble gravel
Colorado River Basin and Climatic Change
Author: United States Environmental Protection Agency (EPA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722708207
Category :
Languages : en
Pages : 134
Book Description
Colorado River Basin and Climatic Change: The Sensitivity of Streamflow and Water Supply to Variations in Temperature and Precipitation
Development of the Lower Colorado River of Texas
Author: Lower Colorado River AuthorityPublisher:
ISBN:
Category : Colorado River (Tex.)
Languages : en
Pages : 46
Book Description
Hydrogeology of the Colorado River alluvial aquifer between Austin and Smithville, Texas
Author: Barry J. HibbsPublisher:
ISBN:
Category : Alluvium
Languages : en
Pages : 222
Book Description
Effects of Climate Change on the Hydrology and Water Resource of the Colorado River Basin
Author: Niklas Smith ChristensenPublisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 92
Book Description
Climatic Variability and the Impact of Possible Future Climatic Changes on Water Supply and Use
Author: John A. DracupPublisher:
ISBN:
Category : Colorado River Watershed (Colo.-Mexico)
Languages : en
Pages : 70
Book Description
Assessing the Hydrologic Impact of Climate Change on a Continental-scale Watershed
Author: Erik Vincent MasThe Effects of Climate Change on the Hydrology and Water Resources of the Colorado River Basin
Author: Niklas S. ChristensenPublisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 363
Book Description