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Stream Channel Stability
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Book Synopsis Stream Reach Inventory and Channel Stability Evaluation by : United States. Forest Service. Northern Region
Download or read book Stream Reach Inventory and Channel Stability Evaluation written by United States. Forest Service. Northern Region and published by . This book was released on 1975 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : E. H. Grissinger
Download or read book Stream Channel Stability written by E. H. Grissinger and published by . This book was released on 1981 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This process-oriented study was organized to investigate three complementary aspects of channel stability including: (a) the nature of channel failure processes; (b) the influences of valley-fill depositional units on these processes; and (c) the properties and distributions of the valley-fill units. The study included the near-surface geologic investigation, investigation of the late-Quaternary valley-fill deposits, and channel morphometric investigations. The properties and distributions of the valley-fill units directly and indirectly influence the nature of channel failure processes. Although gravity-induced failure is the most frequent form of present-day bank instability, the type of gravity failure is dependent upon the properties of the valley-fill units. Both depositional and weathering properties influence the type of failure. The valley-fill units indirectly influence bank stability through their control of groundwater movement and the development of unusually large seepage forces at point-locations along the channels. Bed instability has primarily resulted from upstream migration of knickpoints and the rate of knickpoint migration has been affected by (valley-fill) unit controls. Present drainage systems in the study area are immature; channel morphometry has not adjusted at this time to the new flow regime resultant from cultural and natural changes.
Book Synopsis Stream Channel Stability by : E. H. Grissinger
Download or read book Stream Channel Stability written by E. H. Grissinger and published by . This book was released on 1981 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : W. C. Little
Download or read book Stream Channel Stability written by W. C. Little and published by . This book was released on 1981 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : Colin R. Thorne
Download or read book Stream Channel Stability written by Colin R. Thorne and published by . This book was released on 1981 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : W. C. Little
Download or read book Stream Channel Stability written by W. C. Little and published by . This book was released on 1981 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessing Stream Channel Stability Thresholds by : Darren S. Olsen
Download or read book Assessing Stream Channel Stability Thresholds written by Darren S. Olsen and published by . This book was released on 1993 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : E. H. Seely
Download or read book Stream Channel Stability written by E. H. Seely and published by . This book was released on 1981 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : Deva K. Borah
Download or read book Stream Channel Stability written by Deva K. Borah and published by . This book was released on 1981 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : D. G. DeCoursey
Download or read book Stream Channel Stability written by D. G. DeCoursey and published by . This book was released on 1981 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : Carlos V. Alonso
Download or read book Stream Channel Stability written by Carlos V. Alonso and published by . This book was released on 1981 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to develop a better understanding of the stochastic structure of the instantaneous boundary shear processes in open channel flows. This report presents new measurements of some stochastic properties of boundary shear stress taken at points spaced over half the wetted perimeter of a smooth open channel, under conditions of essentially constant aspect ratio and Reynolds number. The instantaneous boundary shear stress was measured with hot-film sensors driven by constant-temperature anemometers. The anemometer signals were digitized and analyzed in a high speed computer. The effects of position along the wetted perimeter on the statistical moments and the probabilistic distribution of the instantaneous boundary shear stress are discussed. (Author).
Book Synopsis Stream Channel Stability by : Joe C. Willis
Download or read book Stream Channel Stability written by Joe C. Willis and published by . This book was released on 1981 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a stable alluvial channel, no net erosion or deposition of sediment occurs on the average. The sediment supply rate from upstream is balanced by capacity of the flow to transport the bed material. Any successful channel design must maintain this equilibrium or establish it for channel reaches that are not stable. Design relationships between the bed material transport capacity and the hydraulic variables of flow are based primarily on data from relatively small test channels. Reliable data for equilibrium transport of bed material by flows over about twenty cfs are not adequate to insure that data from small flumes can be extrapolated to prototype designs. An investigation was conducted in the 250-ft long test channel at the USDA Sedimentation Laboratory to obtain additional data on equilibrium transport by flows up to 150 cfs. Data on the transport rates, flow friction factors, and statistical properties of the bed forms were obtained. The results are presented as basic variable correlations with the controlled variables of the experiments, depth and discharge, along with attempts to generalize the relationships by similitude principles. (Author).
Book Synopsis Stream Channel Stability by : William Campbell Little
Download or read book Stream Channel Stability written by William Campbell Little and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Channel Stability by : L. D. Meyer
Download or read book Stream Channel Stability written by L. D. Meyer and published by . This book was released on 1981 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Well over half the sediment lost from many watersheds originates as eroded soil from their uplands and bottomlands. Such erosion occurs over such a large area that it often goes unnoticed in comparison to the more spectacular losses from stream channels and gullies, yet it may be an even greater sediment source. Upland erosion is sometimes noticeable when rilling occurs at serious rates, but the 'unseen' interrill erosion, caused primarily by raindrop impact on land between rills and gullies, may also produce great quantities of sediment. This research was conducted to study interrill erosion rates for the major soils and land uses in Goodwin Creek Watershed by applying hundreds of simulated rainstorms on many different soils and cropping conditions. The transport of sediment was studied for various conditions that are typical of intensively cropped land to evaluate how much sediment would be carried from the sources to the major stream systems. The capacity of runoff to transport sediment was affected most by the steepness of the runoff flow channel. Steepnesses exceeding 1% could transport large quantities of sediment. Transport capacity also increased rapidly as flow rate increased and as sediment size decreased. This research confirms that Goodwin Creek Watershed soils are very erodible and that the resulting sediment is readily transported.
Book Synopsis Stability of Relocated Stream Channels by : James Coble Brice
Download or read book Stability of Relocated Stream Channels written by James Coble Brice and published by . This book was released on 1981 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data gathered to document the stability of streams at 103 sites in different regions of the United States where stream channels were relocated for the purposes of highway construction indicate varied responses. In comparison with prior stream stability, bank erosion of the relocated channel was the same at 45 sites, better at 28 sites, and worse at 14 sites. Channel degradation, mostly minor, was discerned at 17 sites. Length of relocation contributed significantly to channel stability only at sites where its value exceeded 250 channel widths; below 100 channel widths, the effects were dominated by other factors. Among the factors identified as critical to the stability of relocated channels are: growth of vegetation on banks (40 sites); bank revetment (33 sites); and stability of prior channel (19 sites). Factors identified as critical to instability are: bends in the channel (21 sites); erodibility of bed-bank materials (16 sites); and instability of prior channel (8 sites).
Book Synopsis Stream Channel Stability by : A. J. Bowie
Download or read book Stream Channel Stability written by A. J. Bowie and published by . This book was released on 1981 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since effective streambank protection measures are costly to install, a determined effort should be made to use vegetation because it is the most readily available material and is relatively inexpensive to obtain. Vegetation greatly reduces the hydraulic forces on the bank and provides other esthetic and environmental advantages over other methods of stabilization. This report describes a series of streambank vegetative studies located on the channels of Johnson, Goodwin and Peters Creek in Panola County near Batesville, Mississippi. On Johnson Creek, there are four sites; two of them use vegetation in conjunction with bank shaping and structural materials, the other two sites use vegetation in conjunction with structural devices without bank shaping. The site of Goodwin Creek uses vegetation in conjunction with bank shaping--with and without structural materials. The Peters Creek sites use woody vegetation in conjunction with structural devices without bank shaping. Criteria used in the design of the combined vegetative and structural projects are presented along with a detailed description of the project sites. Since these type studies require several years to evaluate, only preliminary results are presented and many of them are based on previous experience.
Book Synopsis Assessing Stream Channel Stability at Bridges in Physiographic Regions by : Peggy A. Johnson
Download or read book Assessing Stream Channel Stability at Bridges in Physiographic Regions written by Peggy A. Johnson and published by . This book was released on 2006 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
