Download or read book Mechanics of Soil Erosion from Overland Flow Generated by Simulated Rainfall written by Mustafa Kilinc and published by . This book was released on 1973 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of Soil Erosion from Overland Flow Generated by Simulated Rainfall written by Harold Ray Duke and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of Soil Erosion from Overland Flow Generated by Simulated Rainfall written by and published by . This book was released on 1973 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of Soil Erosion by Rainfall and Overland Flow as Influenced by Slope Runoff Rate and Particle Size written by Lawrence Donald Meyer and published by . This book was released on 1964 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Erosion by Overland Flow and Raindrop Splash on Three Mountain Soils written by Eugene E. Farmer and published by . This book was released on 1971 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rainfall Simulation Runoff and Soil Erosion written by Jan de Ploey and published by . This book was released on 1983 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Erosion by Overland Flow with Rainfall written by Raúl Emilio Zapata and published by . This book was released on 1987 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mathematical Modeling of Soil Erosion by Rainfall and Shallow Overland Flow written by Tingting Zheng and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: New analytical and numerical solutions are developed to both the kinematic approximation to the St Venant equations and the Hairsine-Rose (HR) soil erosion model in order to gain a better physical understanding of soil erosion and sediment transport in shallow overland flow. The HR model is unique amongst physically based erosion models in that it is the only one that: considers the entire distribution of the soil s sediment size classes, considers the development of a layer of deposited non-cohesive sediment having different characteristics to the original underlying cohesive soil and considers separately the erosion processes of rainfall detachment, runoff entrainment and gravitational deposition. The method of characteristics and the method of lines were used to develop both the analytical and numerical solutions respectively. These solutions were obtained for boundary and initial conditions typical of those used in laboratory flume experiments along with physically realistic constant and time dependent excess rainfall rates. Depending on the boundary and initial conditions, interesting new solutions of the kinematic wave equation containing expansion waves, travelling shocks as well as solutions which split into an upslope and downslope drying profiles were found. Numerical solutions of the HR model were applied to the experimental flume data of Polyakov and Nearing (2003) obtained under flow conditions which periodically cycled between net erosion and net deposition conditions. While excellent agreement was found with suspended sediment data, the analysis suggested that an additional transport mechanisms, traditionally not included in soil erosion models, was occurring. While the inclusion of bed-load transport improved the ii overall model prediction, it was still not sufficient. Subsequent asymptotic analysis then showed that the interaction of the flow with an evolving bed morphology was in fact far more important than bed load transport. A very interesting finding from this work showed that the traditional criterion of validating sediment transport model based solely on suspended sediment data was not sufficient as reliable predictions could be obtained even when important transport mechanisms were neglected. Experimental plots of sediment discharge or suspended sediment concentration against water discharge in overland flow have been shown to contain significant hysteresis between the falling and rising limbs of the discharge hydrograph. In the final Chapter, the numerical solution developed for the complete system of soil erosion and kinematic flow was used to show that it was possible for the HR model to simulate three of the four hysteresis loops identified in the literature. Counter clock-wise loops, clock-wise loops and figure 8 loops could all be produced as a result of starting with different initial conditions, being mi(x; 0) = 0, mi(x; 0) = pimt and mi(x; 0) = 0:5pimt respectively. This is the first time that these types of hysteresis loops have been produced by any erosion model. The generation of these hysteresis loops are physically explainable in terms of sediment availability and is consistent with data obtained on the field scale.
Download or read book Soil Erosion written by Rorke Bryan and published by Destedt, West Germany : Catena Verlag. This book was released on 1990 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface seal development in relation to rainstorm intensity. Experimental study and modelling of soil surface crusting processes. Fabric analysis of surface crusts developed under simulated rainfall on loess soils, China. Temporal variations in soil erodibility. Modelling erosion by rain-impacted flow. Solute transport and wind action in relation to overlanc flow and water erosion. Initiation of motion of gravels in concentrated overland flow: cohesive forces and probability of entrainment. Inception of sediment transport in shallow overland flow. Knickpoint evolution in rillwash. A one-dimensional model for rill inter-rill interactions. Threshold conditions for thalweg gulliyng with special reference to loess areas. Interpreting the role of soil strenght in erosion processes. Grain size catenas and hillslope evolution. Quantification of soil redistribution in cultivated fields, using Caesium-137, outlook, Saskatchewan. The catastrophic nature of seepage scald formation in southeastern Australia.
Download or read book Proceedings of the Rainfall Simulator Workshop written by and published by . This book was released on 1979 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Werkdocumenten van een symposium uit de Verenigde Staten over methoden om natuurlijke regenval na te bootsen in bodemkundige experimenten
Download or read book Rainfall Erosivity in Soil Erosion Processes written by Gianni Bellocchi and published by MDPI. This book was released on 2020-04-21 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers recent international research on the association between aggressive rainfall and soil loss and landscape degradation. Different contributions explore these complex relationships and highlight the importance of the spatial patterns of precipitation intensity on land flow under erosive storms, with the support of observational and modelling data. This is a large and multifaceted area of research of growing importance that outlines the challenge of protecting land from natural hazards. The increase in the number of high temporal resolution rainfall records together with the development of new modelling capabilities has opened up new opportunities for the use of large-scale planning and risk prevention methods. These new perspectives should no longer be considered as an independent research topic, but should, above all, support comprehensive land use planning, which is at the core of environmental decision-making and operations. Textbooks such as this one demonstrate the significance of how hydrological science can enable tangible progress in understanding the complexity of water management and its current and future challenges.
Download or read book Soil Erosion written by British Geomorphological Research Group and published by . This book was released on 1980 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concentrates on the application of erosion principles to erosion control, combining the perspectives of the geomorphologist and agricultural engineer. Covers mechanics and processes of soil erosion, methods of measurement and laboratory and field experimentation, approaches to erosion modelling, and implications of these to practical control. Treats water and wind erosion in depth.
Download or read book Soil Erosion written by Jürgen Schmidt and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accelerated degradation of soils and surface waters produce increasing problems in many parts of the world. Within this context, the book addresses the topic Application of Physically Based Soil Erosion Models in order to present some essential tools for improving land-use strategies and conservation measures. Over the last 20 years, the need for more accurate assessments of soil losses and sediment yields has led to the development of some highly complex, process-based soil erosion models. In 14 papers, specialists from 5 European countries, the USA and Brazil report on practical applications of these models and give insight into the latest developments. This book will help to implement state-of-the-art soil erosion prediction technologies within soil and water conservation planning and assessment. Hence, the book should be of special interest to agricultural and environmental engineers, hydrologists, soil scientists and geoscientists.
Download or read book Hydraulics of Sediment Transport written by Walter Hans Graf and published by Water Resources Publication. This book was released on 1984 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is divided into four parts: Part 1 is entitled "A Short History of Sediment Transport"; Part 2 deals with the "Hydrodynamics of Fluid-Particle Systems"; Part 3 is concerned with the "Sediment Transport in Open Channels"; and Part 4 describes the "Sediment Transport in Closed Pipes." The intent of this book was to make each part as self-contained as possible which has made this an exceptional and successful textbook. The brief introduction preceding each part will help the reader become familiar with the topic. This book has been used successfully both as a classroom textbook and as a reference book by consultants involved with sediment transport.
Download or read book Technical Note written by and published by . This book was released on 1978 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rainfall Simulators written by Roger D. Birk and published by . This book was released on 1979 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling Soil Erosion by Water written by John Boardman and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: TO THE MODEL EVALUATION 1. MODELLING SOIL EROSION BY WATER l 2 John Boardman and David Favis-Mortlock 1 School of Geography and Environmental Change Unit Mansfield Road University of Oxford Oxford OX1 3TB UK 2 Environmental Change Unit University of Oxford 5 South Parks Road Oxford OX1 3UB UK Introduction This volume is the Proceedings of the NATO Advanced Research Workshop 'Global Change: Modelling Soil Erosion by Water', which was held on II-14th September 1995, at the University of Oxford, UK. The meeting was also one of a series organised by the IGBP 1 GCTE Soil Erosion Network, which is a component of GCTE's Land Degradation Task (3.3.2) (Ingram et aI., 1996; Valentin, this volume). One aim of the GCTE Soil Erosion Network is to evaluate the suitability of existing soil erosion models for predicting the possible impacts of global change upon soil erosion. Due to the wide range of erosion models currently, in use or under development, it was decided to evaluate models in the following sequence Favis-Mortlock et al., 1996): • field-scale water erosion models • catchmenr-scale water erosion models • wind erosion models • models with a landscape-scale and larger focus. As part of this strategy, the first stage of the GCTE validation of field-scale erosion models was carried out at the Oxford NATO-ARW. I A list of Acronyms fonns Appendix A.
