Furrow Hydraulics With Two Dimensional Infiltration
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Furrow Hydraulics With Two Dimensional Infiltration
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Author : Behroz Mostafazadehfard
language : en
Publisher:
Release Date : 1985
Furrow Hydraulics With Two Dimensional Infiltration written by Behroz Mostafazadehfard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Dissertations, Academic categories.
Computer Simulation To Control Environmental Impact Of Water And Nitrate Leaching In Furrow Irrigated Fields
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Author : Syed Navaid Raja
language : en
Publisher:
Release Date : 1994
Computer Simulation To Control Environmental Impact Of Water And Nitrate Leaching In Furrow Irrigated Fields written by Syed Navaid Raja and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Nitrates categories.
Nitrate contamination in ground and surface waters is of great concern to environmentalists. A two-dimensional model of water and solute movement in soils was used to test the usefulness and relative advantages of a two-dimensional model over a one dimensional model for analysis of deep percolation and nitrate leaching in furrow irrigation. The predictive ability of the model was evaluated using data collected in a series of preliminary field studies. Two methods were used to calibrate the model. First, the cumulative infiltration simulated by the model was compared with an infiltration curve derived from field data. Secondly, soil water potential data were used to compare the observed movement of a wetted front in the soil profile. The calibration results closely followed the two dimensional flow pattern in furrow irrigation. The model was used both in a one-dimensional mode and a two-dimensional mode. Comparison of one-dimensional and two-dimensional models was accomplished using the two-dimensional model, with uniform infiltration across the surface boundary to represent the one-dimensional case, and with infiltration only across the furrow surface for the two-dimensional case. Evaluation of water and nitrate leaching was observed for alternate furrow irrigation as well as every-furrow irrigation with three different furrow spacings; 76, 86, and 102 cm. These results showed that the one-dimensional model always under estimates the leaching amount in comparison to the two-dimensional model. In some cases the one-dimensional model predicted no leaching of water and nitrate below the root zone though leaching was predicted by the two-dimensional model. Evaluation of alternate and every furrow irrigation with different furrow spacing indicated that the leaching amount increased rapidly with the increase of furrow spacing. Under furrow irrigation, attempts to irrigate the soil profile to a level less than, but close to, field capacity will result in leaching. Therefore different irrigation management is needed to minimize leaching. Additionally, the model suggests that the sealing layer which forms in the bottom of the furrow drastically reduced the infiltration rate because of the very low saturated hydraulic conductivity in that area. Sealing layer had a significant effect on the performance of SWMS_2D model, and made the model unusable where high input volume were required.
Two Dimensional Infiltration Equations
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Author : Shan-hsin Chiang
language : en
Publisher:
Release Date : 1985
Two Dimensional Infiltration Equations written by Shan-hsin Chiang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Irrigation categories.
Effect Of Hydraulics On Furrow Infiltration
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Author : Behzad Izadi
language : en
Publisher:
Release Date : 1984
Effect Of Hydraulics On Furrow Infiltration written by Behzad Izadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Kinematic Wave Modeling In Water Resources
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Author : Vijay P. Singh
language : en
Publisher: John Wiley & Sons
Release Date : 1997-10-28
Kinematic Wave Modeling In Water Resources written by Vijay P. Singh and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-10-28 with Technology & Engineering categories.
Kinematic wave (KW) modeling methods are gaining wide acceptance as fast and accurate methods for handling a wide range of water modeling problems. This book provides a through reference to the application of KW methods to such problems as the spatial representation of watersheds, overland flow routing, and channel flow routing.
Applications Of Furrow And Micro Irrigation In Arid And Semi Arid Regions
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Author : Megh R. Goyal
language : en
Publisher: CRC Press
Release Date : 2015-06-18
Applications Of Furrow And Micro Irrigation In Arid And Semi Arid Regions written by Megh R. Goyal and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-18 with Nature categories.
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,
Evaluation Of Irrigation Methods For Salinity Control In Grand Valley
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Author : Robert G. Evans
language : en
Publisher:
Release Date : 1978
Evaluation Of Irrigation Methods For Salinity Control In Grand Valley written by Robert G. Evans and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Irrigation categories.
Sustainability Of Irrigated Agriculture
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Author : L.S. Pereira
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Sustainability Of Irrigated Agriculture written by L.S. Pereira and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Technology & Engineering categories.
Irrigated agriculture and the use of water resources in agriculture face the challenges of sustainable development. Research has advanced our knowledge of water use by crops, soil-water-solutes interactions, and the engineering and managerial tools needed to mobilize, convey, distribute, control and apply water for agricultural production. However, the achievements booked in user practice have revealed the need for new developments in the areas of resource conservation, control of environmental and health impacts, modernisation of technologies and management, economic viability and the social acceptance of changes. The contributions to Sustainability of Irrigated Agriculture cover most of the relevant disciplines. Besides its multidisciplinarity, the different origins, experience, backgrounds and practices of the authors provide a wide, in-depth analysis of the various aspects of water resource utilization in agriculture. The papers review scientific, technical and managerial aspects, highlighting the main problems, issues and future developments. The book covers the different aspects of sustainability, including environmental, technical, economic, institutional and social ones. Advances in irrigation science and engineering are dealt with, both on- and off-farm. Special attention is paid to the different components of water quality management, to the transfer of technology, and to capacity building.
Advances In Infiltration
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Author :
language : en
Publisher:
Release Date : 1983
Advances In Infiltration written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Technology & Engineering categories.
Environmental Soil Physics
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Author : Daniel Hillel
language : en
Publisher: Elsevier
Release Date : 1998-09-09
Environmental Soil Physics written by Daniel Hillel and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-09-09 with Science categories.
Environmental Soil Physics is a completely updated and modified edition of the Daniel Hillels previous, successful books, Introduction to Soil Physics and Fundamentals of Soil Physics. Hillel is a Pulitzer Prize-winning author, one of the true leaders in the field of environmental sciences. The new version includes a chapter and problems on computational techniques, addresses current environmental concerns and trends. Updates and expands the scope of Hillel's prior works, Fundamentals of Soil Physics (1980)and Applications of Soil Physics (1980) Explores the wide range of interactions among the phases in the soil and the dynamic interconnections of the soil with the subterranean and atmospheric domains Draws attention to historical and contemporary issues concerning the human management of soil and water resources Directs readers toward solution of practical problems in terrestrial ecology, field-scale hydrology, agronomy, and civil engineering Incorporates contributions by leading scientists in the areas of spatial variability, soil remediation, and the inclusion of land-surface processes in global climate models