Download or read book Soil Freeze thaw Effects on Bank Erodibility and Stability written by Lawrence W. Gatto and published by . This book was released on 1995 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Freeze thaw Effects on Bank Erosion and Stability written by Lawrence W. Gatto and published by . This book was released on 1995 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Freeze Thaw Effects on Bank Erosion and Stability Connecticut River Field Site Norfolk Vermont written by and published by . This book was released on 2005 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bank recession resulting from surficial erosion and mass failure is a consequence of hydraulic forces and geotechnical processes. One important set of geotechnical processes in regions where seasonal frost forms is soil freeze-thaw (FT) cycling and associated ground-ice growth and melt. In cold regions soil FT processes usually cause more bank recession annually than other processes. The magnitude of FT effects is variable, depending on soil type, water content, and freezing rate. The banks along the Connecticut River at Norwich, Vermont are unstable and receding in certain locations. A 40-m-long segment of unstable east-facing bank was selected for intensive monitoring along with nearby north- and south-facing bank locations. This technical note documents our field observations, measurements, and analysis encompassing three years of monitoring. Our data acquisition equipment, focusing on FT processes, was installed in November through December 2002, and data collection continued through July 2005. The primary purposes of the field program were to evaluate: 1) the depth and duration of soil FT, and the effect of orientation and soil moisture on these parameters, 2) the effects of FT on soil strength and erosional processes, 3) the timing and depth of any slope failures of the east-facing bank, and 4) the hypothesis of soil FT as a primary contributor to slope failure. Results indicate that bank orientation and soil moisture can have dramatic effects on the depth, extent, and duration of soil freezing. FT of the monitored banks generally affected the soil to a depth of 0.75 m below the surface. The shallow nature of the bank erosion at this site is consistent with FT weakening of near surface soils. Subsequent rainfall and runoff are then able to readily move these sediments down slope causing progressive bank recession.
Download or read book Soil Freeeze thaw Effects on Bank Erodibility and Stability written by Lawrence W Gatto and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cold Regions Engineering Inclusion of Freeze Thaw Induced Soil and Bank Erosion in CoE Planning Engineering O M and Model Development written by and published by . This book was released on 2004 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil freeze thaw (FT) processes directly affect soil erodibility and bank-failure susceptibility (Fig. 1) (Gatto et al. 2001, Simon et al. 2000) and thus have substantial impact on shoreline or bank evolution, system-wide sediment management, reservoir infilling, levee stability, and sediment-bound contaminant transport within watersheds. This technical note outlines how FT cycling affects overland soil erosion and bank failure. In so doing, it alerts Corps planners, designers, O & M personnel, and water-resources modelers to the importance of knowing the magnitude of these effects on sediment detachment, failure, and transport in such cold-climate, navigable systems as the Mississippi, Illinois, Ohio, Missouri, Susquehanna, Delaware, Columbia, and Sacramento Rivers, and the Great Lakes and their connecting channels.
Download or read book Cold Regions Engineering written by Lawrence W. Gatto and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structure Function and Management Implications of Fluvial Sedimentary Systems written by Fiona J. Dyer and published by . This book was released on 2002 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency of freeze thaw cycles bulk density and saturation effects on soil surface shear and aggregate stability in resisting water erosion written by S. N. Asare and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survey of River Ice Influences on Channel Bathymetry Along the Fort Peck Reach of the Missouri River Winter 1998 1999 written by and published by . This book was released on 2002 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravel Bed Rivers written by Michael Church and published by John Wiley & Sons. This book was released on 2012-02-10 with total page 605 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gravel-Bed Rivers: Processes, Tools, Environments presents a definitive review of current knowledge of gravel-bed rivers, derived from the 7th International Gravel-bed Rivers Workshop, the 5-yearly meeting of the world’s leading authorities in the field. Each chapter in the book has been specifically commissioned to represent areas in which recent progress has been made in the field. The topics covered also represent a coherent progression through the principal areas of the subject (hydraulics; sediment transport; river morphology; tools and methods; applications of science). Definitive review of the current knowledge of gravel-bed rivers Coverage of both fundamental and applied topics Edited by leading academics with contributions from key researchers Thoroughly edited for quality and consistency to provide coherent and logical progression through the principal areas of the subject.
Download or read book Remote Sensing for Hydrocarbon Exploration written by Andreas Laake and published by Springer Nature. This book was released on 2021-11-03 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides insights into the benefits of using remote sensing data from a geoscientist's perspective, by integrating the data with the understanding of Earth's surface and subsurface. In 3 sections, the book takes a detailed look at what data explorationists use when they explore for hydrocarbon resources, assess different terrain types for planning and hazards and extract present-day geologic analogs for subsurface geologic settings. The book presents the usage of remote sensing data in exploration in a structured way by detecting individual geologic features as building blocks for complex geologic systems. This concept enables readers to build their own workflows for the assessment of complex geologic systems using various combinations of remote sensing data. Section 1 introduces readers to the foundations of remote sensing for exploration, covers various methods of image processing and studies different digital elevation and bathymetry models. Section 2 presents the concept of geomorphology as a means to integrate surface and subsurface data. Different aspects of rendering in 2D and 3D are explained and used for the interpretation and extraction of geologic features that are used in exploration. Section 3 addresses remote sensing for hydrocarbon exploration in detail, from geophysical data acquisition to development and infrastructure planning. The organization of this chapter follows an exploration workflow from regional to local modeling studying basin and petroleum system modeling as well as logistics planning of seismic surveys and near-surface modeling. Aspects of field development and infrastructure planning comprise multi-temporal and dynamic modeling. The section closes with a structured approach to extracting geologic analogs from interpreted remote sensing data. The book will be of interest to professionals and students working in exploration for hydrocarbons and water resources, as well as geoscientists and engineers using remote sensing for infrastructure planning, hazard assessment and dynamic environmental studies.
Download or read book River and Lake Ice Processes Impacts of Freshwater Ice on Aquatic Ecosystems in a Changing Globe written by Karl-Erich Lindenschmidt and published by MDPI. This book was released on 2019-01-11 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "River and Lake Ice Processes—Impacts of Freshwater Ice on Aquatic Ecosystems in a Changing Globe" that was published in Water
Download or read book Final Report to Congress The Streambank Erosion Control Evaluation and Demonstration Act of 1974 Section 32 Public Law 93 251 written by United States. Army. Corps of Engineers and published by . This book was released on 1981 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis and Modelling of River Meandering written by Alessandra Crosato and published by IOS Press. This book was released on 2008 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines the morphological changes of non-tidal meandering rivers at the spatial scale of several meanders. With this purpose, a physics-based mathematical model, MIANDRAS, has been developed for the simulation of the medium-term to long-term evolution of meandering rivers. Application to several real rivers shows that MIANDRAS can properly simulate both equilibrium river bed topography and planimetric changes. Three models of different complexity can be obtained by applying different degrees of simplification to the equations. These models, along with experimental tests and field data, constitute the tools for several analyses. At conditions of initiation of meandering, it is found that river bends can migrate upstream and downstream. This depends on meander wave length and width-to-depth ratio, irrespective of whether the parameters are in the subresonant or the superresonant range.
Download or read book Final Report to Congress written by United States. Army. Corps of Engineers and published by . This book was released on 1981 with total page 1438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying the Effect of a Freezethaw Cycle on Soil Erosion written by and published by . This book was released on 2004 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper we quantitatively tested the hypothesis that soil freeze-thaw(FT) processes significantly increase the potential for upland hillslope erosion during runoff events that follow thaw. We selected a frost-susceptible silt to obtain an upper bound on FT effects, and completed three series of six experiments each to quantify differences in soil erodibility and rill development for bare soil following a single FT cycle. Each series represented a specific soil moisture range: 16-18%, 27-30%, and 37-40% by volume, with nominal flow rates of 0.4, 1.2, and 2.4 L/min and slopes of 8 and 15 . Each experiment used two identical soil bins, one a control (C) to remain unfrozen, the other to be frozen and thawed. Standard soil characterization tests did not detect significant differences between the FT and C bins. Experimental results were closely related to conditions of the experiment, imposing a requirement for minimum differences in soil weight, bulk density, and soil moisture through each series. We measured cross-sectional geometry of an imposed straight rectangular rill before each experiment, sediment load during, and rill cross sections after. Changes in cross section provided detailed measures of erosion at specific locations along the rill, while sediment load from time series runoff samples integrated the rill erosion. Several parameters, including average maximum rill width, average maximum rill depth, rill cross-section depth measures, and sediment load all followed similar trends. Each was greater in the FT than in the C, with values that generally increased with slope and flow. However, soil moisture was the only parameter that affected the FT/C relationship. For example, average sediment load grouped by soil moisture provided FT/C ratios of 2.4, 3.0, and 5.0 for low, mid, and high moisture, respectively. In contrast, a "dry" experiment at 4.4 soil moisture had FT/C of 1.02 for sediment load.
Download or read book Canadian Geotechnical Journal written by National Research Council Canada and published by . This book was released on 1998 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
