Download or read book A Wetting front Model of Soil Water Dynamics written by Roger Burnham Clapp and published by . This book was released on 1982 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Water Dynamics written by Arthur W. Warrick and published by Oxford University Press, USA. This book was released on 2003 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Symbols and Abbreviations. 1. The Soil System. 2. Soil Water Flow. 3. Saturated Flow. 4. One-Dimensional Absorption. 5. One-Dimensional Infiltration and Vertical Flow. 6. Multidimensional Water Flow in Variably Saturated Soils. 7. Solute and Contaminant Transport. References. Index.
Download or read book A Methodology for Predicting Near Surface Soil Moisture written by George M. Hornberger and published by . This book was released on 1984 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive model of soil-water dynamics, a 'wetting front' model, was developed and tested. The model represents a variety of flow processes including infiltration, redistribution, drainage and evaporation. The accuracy of the model was tested by comparison with results from a finite difference solution of the Richards equation and was found to be a reasonable representation. The model was used to investigate the extent to which observed spatial variability in soil moisture may be due to soil heterogeneity. Results suggest that in excess of 50% of observed variance in soil moisture may be attributable to soil heterogeneity. The relationships among soil hydraulic parameters, the specification of which is necessary for any physically-based model including the wetting-front model, and soil physical characteristics were investigated using multivariate statistical methods. Statistical properties of the parameters in each soil textural class have been tabulated. (Author).
Download or read book Climate Change and Terrestrial Ecosystem Modeling written by Gordon Bonan and published by Cambridge University Press. This book was released on 2019-02-21 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an essential introduction to modeling terrestrial ecosystems in Earth system models for graduate students and researchers.
Download or read book The Upscaling of One dimensional Unsaturated Soil Water Flow Model Under Infiltration and Evapotranspiration Boundary Conditions written by Sang Dan Kim and published by . This book was released on 2003 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rainfall Infiltration Modeling written by Renato Morbidelli and published by MDPI. This book was released on 2020-12-02 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rainfall infiltration is an important component of the hydrologic cycle and plays a crucial role in the formation of surface runoff, providing subsurface water that governs the water supply for agriculture, the transport of pollutants through the vadose zone, and the recharge of aquifers. The spatiotemporal evolution of the infiltration rate under natural conditions cannot currently be deduced by direct measurements at any scale of interest. Therefore, the use of infiltration modeling is of fundamental importance in applied hydrology and allows this process to be described through measurable quantities. In spite of the continuous development of infiltration modeling in recent decades, the estimation of infiltration at different spatial scales, i.e., from the local to watershed scales, remains a complex problem because of the natural spatial variability of both soil hydraulic characteristics and rainfall. For many years, research activity has been limited to the development of local or point infiltration models for vertically homogeneous soils with flat surfaces. Recent scientific literature has extended infiltration modeling to many other involved elements whose representation, however, still represents an open problem. In this context, this volume attempts to make a contribution to the modeling of point infiltration into vertically non-uniform soils or soils modified by human activities, infiltration over horizontal heterogeneous areas, infiltration into soil surfaces with significant slopes, interaction between the infiltration process and the groundwater system, and infiltration due to irrigation and the surface water–groundwater dynamics.
Download or read book Water Flow In Soils written by Tsuyoshi Miyazaki and published by CRC Press. This book was released on 2005-07-28 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of a bestseller, Water Flow in Soils bridges the fields of soil physics-where descriptions of water flow tend to be microscopic- and hydrology - where they tend to be macroscopic. Unlike other physics laden texts, this work conveys the fundamental concepts of water flow in soils with clear and essentially nonmathematical explanation
Download or read book Unsaturated Flow in Hydrologic Modeling written by H.J. Morel-Seytoux and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume certainly is a Conference Proceedings, the Proceedings of the NATO Advanced Research Workshop (ARW) on "Unsaturated Flow in Hydrologic Modeling" held at "Les Villages du Soleil" near ArIes, France from June 13 to 17, 1988. Let me therefore acknowledge properly, at the very beginning, the gratitude of all the participants to the NATO Science Committee for its generous support and worthwhile goal of bringing together scientists of many countries to communicate and share their experiences. Particular thanks are extended to the director of the program, Dr. Luis Vega da Cunha for his interest and understanding. On the other hand this volume is also, and probably more so, a Textbook that fills a gap in the field of unsaturated flow. Many treatises on the subject present the theory in its different aspects. Hardly any explain in details how the different pieces can be put together to address realistic problems at the basin scale. The various invited contributions to the ARW were structured in a subject progression much as chapters are organized in a book. The intent of the ARW was to assess the current state of knowledge in "Unsaturated Flow" and its use in "Hydrologic Modeling Practice". In a sense the interest in fundamentals of unsaturated flow in this ARW was not just for the sake of knowledge but also and primarily for the sake of action. Can such fundamental knowledge be utilized for better management of the water resource? was the basic question.
Download or read book Research in Progress Between and written by United States. Army Research Office and published by . This book was released on 1978 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulation of Ecological and Environmental Models written by Miguel F. Acevedo and published by CRC Press. This book was released on 2016-04-19 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given the importance of interdisciplinary work in sustainability, Simulation of Ecological and Environmental Models introduces the theory and practice of modeling and simulation as applied in a variety of disciplines that deal with earth systems, the environment, ecology, and human-nature interactions. Based on the author's many years of teaching g
Download or read book Recharge of Phreatic Aquifers in Semi Arid Areas written by Ian Simmers and published by Routledge. This book was released on 2017-10-19 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater use is of fundamental importance to meet the rapidly expanding urban, industrial and agricultural water requirements in (semi) arid areas. Quantifying the current rate of groundwater recharge and define its variability in space and time are thus prerequesites for efficient groundwater resource managment in these regions, where such resources are often the key to economic development. Attention focuses on recharge of phreatic aquifers, often the most readily-available and affordable source of water in (semi) arid regions. These aquifers are also the most susceptible to contamination, with the recharge rate determining their level of vulnerability. (Semi) arid zone recharge can be highly variable, the greater the aridity, the smaller and potentially more variable the natural flux. Its determination is an iterative process, involving progressive data collection and resource evaluation; there is also a need to use more than one technique to verify results. Direct, localised and indirect recharge mechanisms from a spectrum of known sources are addressed in the framework of recharge from precipitation, intermittant flow and permanent water bodies. The approach taken for each of these reflects the nature and current understanding of the processes involved. The volume also reviews current recharge estimation challenges, outlines recent developments and offers guidance for potential solutions.
Download or read book Microirrigation for Crop Production written by James E. Ayars and published by Elsevier. This book was released on 2023-11-01 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microirrigation for Crop Production: Design, Operation, and Management, Second Edition, Volume Thirteen is the latest release in this go-to foundational resource for the basics of engineering and the science of the design and operation of micoirrigation systems. This new edition includes novel methods for measurement and estimation of evapotranspiration, resource-efficient microirrigation design and operation, advanced irrigation scheduling methods and tools, novel methods and technology of microirrigation automation, monitoring and control, updates in crop salinity tolerance and leaching practices, variable rate irrigation, updates on the use of biological effluents and chemicals and pesticides to include safety and regulatory concerns.The revised book will provide an understanding on the basic science needed to comprehend systems design, operation, management, maintenance, monitoring and performance evaluation. Presents a detailed explanation and examples of systems design, operation, and management specific to the latest types of microirrigation systems, as well as sample irrigation schedules Assesses the proper use of irrigation technology and its effects to increase efficiency and crop productivity Includes illustrations of design options and charts of systems typologies
Download or read book Coupled Dynamics in Soil written by Yijian Zeng and published by Springer Science & Business Media. This book was released on 2012-12-14 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: In arid and semi-arid areas, the main contributions to land surface processes are precipitation, surface evaporation and surface energy balancing. In the close-to-surface layer and root-zone layer, vapor flux is the dominant flux controlling these processes - process which, in turn, influence the local climate pattern and the local ecosystem. The work reported in this thesis attempts to understand how the soil airflow affects the vapor transport during evaporation processes, by using a two-phase heat and mass transfer model. The necessity of including the airflow mechanism in land surface process studies is discussed and highlighted.
Download or read book Water Resources Management and Sustainability written by Mohsen Sherif and published by Springer Nature. This book was released on 2023-03-15 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book will be of interest to researchers and practitioners in the field of hydrology, environmental engineering, agricultural engineering, earth sciences, and watershed and range sciences, as well as to those engaged in water resources planning, development and management in arid and semi-arid areas. Given the lack of literature on arid regions, this book not only provides an assessment of water resource management in arid regions but also addresses solutions, and it can also be an outstanding textbook on water resources management and sustainability for arid regions. This volume in the Water Science and Technology Library includes selected papers that have been presented and discussed during the International Water Resources Management and Sustainability: Solutions for Arid Regions, 22–-24 March 2022, Dubai, United Arab Emirates. The conference was organized by the National Water and Energy Center, UAE University, in collaboration with the South Australian Goyder Institute for Water Research, and the Department for Environment and Water, Government of South Australia. The conference attracted a large number of nationally and internationally well-known experts who have been at the forefront of water resources management and sustainability in arid and semi-arid regions. More than 55 countries, covering the five continents, were represented. The conference was designed to facilitate and encourage new perspectives on how science and innovative technologies can transform water management and sustainability in arid and semi-arid regions around the world. It addressed current challenges and priorities in water management and provided a forum to share knowledge, experiences, research, and discoveries.
Download or read book Overland Flow Dynamics and Solute Transport written by Vyacheslav G. Rumynin and published by Springer. This book was released on 2015-10-29 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides essential background knowledge on a wide range of hydrological processes governing contaminant transport from soil to surface water across a range of scales, from hillslope to watershed. The mathematical description of these processes is based on both well-known and unique analytical solutions of different initial and boundary problems (primarily using methods from the kinematic wave theory and the reservoir/lumped-parameter concept), supported by numerical modelling studies. Some research topics, in particular several case studies, are illustrated by monitoring and experimental data analysis to show the importance of the research’s applications in environmental practice and environmental education. Specific results concern the recognition of: (a) the effect of transient rainfall–runoff–infiltration partitioning on the chemical response of drainage areas to excess precipitation under certain field conditions related to the soil, hillslope characteristics, and contaminant properties; (b) soil erosion as a key factor that enhances the potential of adsorbed chemical transport in runoff; and (c) common tendencies in radionuclide behaviour in the near-surface environment contaminated by radioactive fallout from the Chernobyl (1986), Fukushima (2011) and the less known Kyshtym (1957) accidents, as well as from nuclear weapon tests in the atmosphere since 1952. The book’s goal is to provide a conceptual foundation enabling readers to apply scientific knowledge to solve practical problems in environmental hydrology and radiology. More specifically, the book presents the state-of-the-art approaches that scientists and natural resources experts need in order to significantly improve the prediction of changes in the soil–water system chemistry due to human activities.
Download or read book Soil Water Models written by R. DeJong and published by Research Branch, Agriculture Canada. This book was released on 1984 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applications of Furrow and Micro Irrigation in Arid and Semi Arid Regions written by Megh R. Goyal and published by CRC Press. This book was released on 2015-06-18 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of Furrow and Micro Irrigation in Arid and Semi-Arid Regions, the fifth volume in the Research Advances in Sustainable Micro Irrigation series, addresses the ever-challenging need for irrigation systems in arid and semi-arid regions of the world, areas that are suffering from severe water shortages. These areas, such as Egypt, Tunisia,
