Download or read book Influence of Soil Structure and Root Water Uptake on Flow in the Unsaturated Zone written by Anna Kuhlmann and published by . This book was released on 2012 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Soil Structure on Saturated Water Flow written by P. J. C. Walker and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Saturated Flow and Soil Structure written by Heiko Diestel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil and water pollution have a serious impact on the environment, and soil scientists and hydrologists need fundamental help for the estimation of the consequences. The experiments described in this volume deal with the quantification of the morphology of interaggregate voids and of the flow through such voids as well as around impermeable inclusions. The diagrams given in the appendix can be used as references for such measurements. This work is put into the context of the international literature on the subject. An index and a glossary complete the volume. The subject of this work is of great interest to hydrologists and soil scientists working on the estimation of the consequences of soil and water pollution.
Download or read book Applications of Soil Physics written by Daniel Hillel and published by Elsevier. This book was released on 2012-12-02 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of Soil Physics deals with the applications of soil physics and covers topics ranging from infiltration and surface runoff to groundwater drainage, evaporation from bare-surface soils, and uptake of soil moisture by plants. Water balance and energy balance in the field are also discussed, along with tillage and soil structure management. The development and extension of Penman's evaporation formula is also described. This book is comprised of 14 chapters and begins with a systematic description of the field-water cycle and its management, with emphasis on infiltration and runoff; redistribution and drainage; evaporation and transpiration; and irrigation and tillage. Subsequent chapters focus on transpiration from plant canopies; freezing phenomena in soils; scaling and similitude of soil-water phenomena; spatial variability of soil physical properties; and movement of solutes during infiltration into homogeneous soil. Concepts of soil-water availability to plants are considered, together with principles of irrigation management and the advantages and limitations of drip irrigation. This monograph is intended for upper-level undergraduate and graduate students of the environmental, engineering, and agronomic sciences.
Download or read book Current Research in Nonlinear Analysis written by Themistocles M. Rassias and published by Springer. This book was released on 2018-06-18 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current research and applications in nonlinear analysis influenced by Haim Brezis and Louis Nirenberg are presented in this book by leading mathematicians. Each contribution aims to broaden reader’s understanding of theories, methods, and techniques utilized to solve significant problems. Topics include: Sobolev Spaces Maximal monotone operators A theorem of Brezis-Nirenberg Operator-norm convergence of the Trotter product formula Elliptic operators with infinitely many variables Pseudo-and quasiconvexities for nonsmooth function Anisotropic surface measures Eulerian and Lagrangian variables Multiple periodic solutions of Lagrangian systems Porous medium equation Nondiscrete Lassonde-Revalski principle Graduate students and researchers in mathematics, physics, engineering, and economics will find this book a useful reference for new techniques and research areas. Haim Brezis and Louis Nirenberg’s fundamental research in nonlinear functional analysis and nonlinear partial differential equations along with their years of teaching and training students have had a notable impact in the field.
Download or read book Soil and Water written by Daniel Hillel and published by Elsevier. This book was released on 2012-12-02 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil and Water: Physical Principles and Processes describes the physical principles governing the soil-water system and particularly the sequence of processes constituting the cycle of water in the field. Organized into two parts, with a total of 11 chapters, this book first discusses the basic physical properties of both soil and water. Some chapters deal with the state of water in soil and flow of water in saturated and unsaturated soil. The second part focuses on the aspects of field water cycle, starting from the entry of water into soil to the redistribution of soil moisture. It also describes the groundwater drainage, evaporation from bare-surface soils, uptake of soil water by plants, and the water and energy balance in the field. This work is meant for students and professional workers in soil physics and other related disciplines who need or might be interested in a fundamental and up-to-date exposition of soil physics.
Download or read book Soil Water Root Processes written by Stephen H. Anderson and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid advances in tomography and imaging techniques and their successful application in soil and plant science are changing our sciences today. Many more articles using imaging and tomography are being published currently compared to 20 years ago. Soil–Water–Root Processes: Advances in Tomography and Imaging is a unique assemblage of contributions exploring applications of imaging and tomography systems in soil science—it provides an updated collection of X-ray computed tomography, synchrotron microtomography, neutron imaging, magnetic resonance imaging, geophysical imaging tools, and other tomography techniques for evaluating soils and roots. Exciting new procedures and applications have been developed, with the promise to propel forward our understanding of soil and plant properties and processes.
Download or read book Soil Physics with Python written by Marco Bittelli and published by . This book was released on 2015 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: This innovative study presents concepts and problems in soil physics, and provides solutions using original computer programs. It provides a close examination of physical environments of soil, including an analysis of the movement of heat, water and gases. The authors employ the programminglanguage Python, which is now widely used for numerical problem solving in the sciences. In contrast to the majority of the literature on soil physics, this text focuses on solving, not deriving, differential equations for transport. Using numerical procedures to solve differential equations allowsthe solution of quite difficult problems with fairly simple mathematical tools. Numerical methods convert differential into algebraic equations, which can be solved using conventional methods of linear algebra. Each chapter introduces a soil physics concept, and proceeds to develop computer programsto solve the equations and illustrate the points made in the discussion.Problems at the end of each chapter help the reader practise using the concepts introduced. The text is suitable for advanced undergraduates, graduates and researchers of soil physics. It employs an open source philosophy where computer code is presented, explained and discussed, and provides thereader with a full understanding of the solutions. Once mastered, the code can be adapted and expanded for the user's own models, fostering further developments. The Python tools provide a simple syntax, Object Oriented Programming techniques, powerful mathematical and numerical tools, and a userfriendly environment.
Download or read book Spatial Distribution and Water Uptake of Roots in Structured Growth Media written by Mariana Amato and published by . This book was released on 1991 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Effects of Irrigation Management on Soil Salinity and Crop Transpiration at the Field Level written by S.M.P. Smets and published by IWMI. This book was released on 1996 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Three dimensional Solute Transport Modeling in Coupled Soil and Plant Root Systems written by Natalie Schröder and published by Forschungszentrum Jülich. This book was released on 2014-03-21 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling Crop weed Interactions written by Martin J. Kropff and published by Int. Rice Res. Inst.. This book was released on 1993 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: General introduction; Empirical models for crop-weed competition; Eco-physiological models for crop-weed competition; Mechanisms of competition for light; Mechanisms of competition for water; Mechanisms of competition for nitrogen; Eco-physiological characterization of the species; Understanding crop-weed interaction in field situation; The impact of environmental and genetic factors; Practical applications.
Download or read book Current Perspective on Irrigation and Drainage written by Surendra Nath Kulshreshtha and published by BoD – Books on Demand. This book was released on 2017-03-01 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was designed to be a comprehensive review of selected topics related to irrigation and drainage. Readers will find themes such as salinity control, decision support systems, subsurface drainage, irrigation scheduling in nurseries, irrigation with municipal wastewater, and sustainable drainage systems. These topics and pursuant discussions are expected to be very fruitful in the continuing debate on global food security.
Download or read book Unsaturated zone Modeling written by R.A. Feddes and published by Springer Science & Business Media. This book was released on 2004-10-11 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mankind has manipulated the quantity and quality of soil water for millennia. Food production was massively increased through fertilization, irrigation and drainage. But malpractice also caused degradation of immense areas of once fertile land, rendering it totally unproductive for many generations. In populated areas, the pollutant load ever more often exceeds the soil’s capacity for buffering and retention, and large volumes of potable groundwater have been polluted or are threatened to be polluted in the foreseeable future. In the past decades, the role of soil water in climate patterns has been recognized but not yet fully understood. The soil-science community responded to this diversity of issues by developing numerical models to simulate the behavior of water and solutes in soils. These models helped improve our understanding of unsaturated-zone processes and develop sustainable land-management practices. Aimed at professional soil scientists, soil-water modelers, irrigation engineers etc., this book discusses our progress in soil-water modeling. Top scientists present case studies, overviews and analyses of strengths, weaknesses, opportunities and threats related to soil-water modeling. The contributions cover a wide range of spatial scales, and discuss fundamental aspects of unsaturated-zone modeling as well as issues related to the application of models to real-world problems.
Download or read book Three dimensional Modelling of Soil plant Interactions written by Tom Schröder and published by Forschungszentrum Jülich. This book was released on 2009 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Root Water Uptake written by Parikshit Verma and published by . This book was released on 2013 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Root water uptake by plants mediates the exchange of water, carbon and energy between land surface and atmosphere and is important in hydrological, climatological, agricultural and ecological studies. Field measurements show that root water uptake could be significantly affected by root water compensation and hydraulic redistribution. We thus use a root water uptake model able to describe these two mechanisms and show their importance when vegetation is growing in shallow water-table environments or duplex soils. The model is based on the Richards equation for the water-flow in soils, with a term for root water uptake being a function of the water potential difference between root xylem and the soil. We describe the flow in the xylem using the Darcy's equation.The model is used in three studies aimed at highlighting the role that root water compensation and hydraulic redistribution might have on the overall root water uptake. In the first study, the model in one dimension is applied to a site near Sydney, Australia, to investigate how native trees growing on duplex soils are able to sustain transpiration rate despite long periods with little or no rain. The model was able to reproduce sap-flux data and the pattern of soil, root and leaf water potential for several months. Scenarios with different root depths showed that trees were able to adjust their water-uptake rates from different soil layers based on soil moisture availability; thus, root water compensation appears to be a key mechanism to maintain sustained transpiration rates. In a second study we investigated the contribution of root water compensation and hydraulic redistribution to root water uptake in shallow water-table environments. We compared the results of our model with a more commonly used root water uptake model. In the third study, we extended the 1D-model to two dimensions, thereby being able to simulate horizontal hydraulic redistribution and the interaction between species with different root systems. In the 2D-model, the roots were assumed to be a continuum in soil and the root systems were described in terms of xylem conductivity fields. Scenarios are presented to show that the 2D-model is able to reproduce observed flow patterns through roots in parts of the soil with different degrees of moisture. The studies presented in this thesis show the further development and use of a modeling approach that is gaining increasing interest in the recent literature. These studies present a realistic description of the role that root water compensation and hydraulic redistribution play in plant water use. The 2D-model introduces a representation of the root system that allows for modelling vertical (hydraulic lift) and horizontal hydraulic redistribution of water in soil, and an efficient description of the interaction between species with different root systems.
