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Analysis Of Flow And Water Quality Components In Drainage Channels In Tile Drained Watersheds
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Book Synopsis Analysis of Flow and Water Quality Components in Drainage Channels in Tile Drained Watersheds by :
Download or read book Analysis of Flow and Water Quality Components in Drainage Channels in Tile Drained Watersheds written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantifying Base Flow to Drainage Channel in a Tile-drained Watershed by : Kristopher Shawn Lander
Download or read book Quantifying Base Flow to Drainage Channel in a Tile-drained Watershed written by Kristopher Shawn Lander and published by . This book was released on 2001 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-resources Investigations Report by :
Download or read book Water-resources Investigations Report written by and published by . This book was released on 2002 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1973 with total page 1562 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluations of the Environmental Effects of Controlled Tile Drainage on Watershed and River Using the Improved SWAT and the QUAL2Kw Under Current and Future Climate Regimes by : Zhenyang Que
Download or read book Evaluations of the Environmental Effects of Controlled Tile Drainage on Watershed and River Using the Improved SWAT and the QUAL2Kw Under Current and Future Climate Regimes written by Zhenyang Que and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In agriculture-dominated areas, water pollution resulting from nutrients migrating from farms to water bodies is a major concern. The migration is further exacerbated by traditional tile drain known as Uncontrolled Tile Drainage (UCTD), which removes excess water from areas to keep the water table low enough for crops to grow. UCTD, commonly used in Ontario, Canada, is believed to contribute to water quality issues, whereas Controlled Tile Drainage (CTD) is an alternative technique in which a structure controls the outlets of the drains so that water only leaves a field when the water table level exceeds a desired threshold. Considered as a Best Management Practice (BMP), CTD has been documented as an efficient practice preventing nutrients from migrating out of agricultural fields. This thesis aims to improve our understanding of the environmental benefits of replacing UCTD with CTD. Three significant contributions were achieved. The first contribution of the thesis is the improvements of the algorithm for calculating nitrates in tile flows in the Soil and Water Assessment Tool (SWAT) model. Researchers have simulated CTD by dynamically changing tile depth to mimic the operation of outlet structure gates, but it has been demonstrated that doing so results in inaccuracies, and so the algorithm in the model has been improved subsequently. The current author proposed and tested a new algorithm for calculating nitrates in tile flows that better represents the dynamics of water and nutrients in soil layers for the SWAT model. A model for the South Nation watershed, located in Ontario, Canada, was then developed and successfully calibrated using the improved SWAT model. The second contribution was the extension of the SWAT model to simulate riverine hydraulic and water quality processes by coupling it with the QUAL2Kw model. In this thesis, a procedure is developed to couple the SWAT model and the QUAL2Kw model to enable continuous simulations of 13 water quality parameters in the South Nation River system. The coupled model was calibrated and verified at various observed locations along the river during the five seasons of growth from 2006 to 2010. The simulation results suggested that CTD also improved the water quality of the river by lowering biologically available N levels of NO2--N, and NO3--N, thereby impeding phytoplankton growth in the river. The third contribution is the verification of the benefits of replacing UCTD with CTD in the future climates. The confirmation was done using the SWAT model alone, and then the coupled SWAT/QUAL2K models, using a matrix of climate change experiments performed with several Global Climate Models and Regional Climate Models. The results suggest that nutrient loading from the watershed will increase in the 2021-2050 period compared to the 1985-2006 period. Thus, pollution from agricultural fields will worsen with the current UCTD approach, while the results also show that CTD would perform effectively and stably in future climate scenarios and could counterbalance the effects of climate change on water quality. To the author's knowledge, this study is the first attempt to date to assess the environmental effects of CTD on a watershed and river by coupling the SWAT and QUAL2Kw models. The findings expand the current scope of knowledge on the environmental effects of CTD on watersheds and rivers under current and future climate change regimes. Long periods of continuous simulation and a matrix of climate change scenarios also make this study stand out from other studies. It laid a foundation for future investigations.
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relation of Environmental Characteristics to the Composition of Aquatic Assemblages Along a Gradient of Urban Land Use in New Jersey, 1996-98 by : Jonathan G. Kennen
Download or read book Relation of Environmental Characteristics to the Composition of Aquatic Assemblages Along a Gradient of Urban Land Use in New Jersey, 1996-98 written by Jonathan G. Kennen and published by . This book was released on 2002 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1975 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydraulic Research in the United States and Canada by : United States. National Bureau of Standards
Download or read book Hydraulic Research in the United States and Canada written by United States. National Bureau of Standards and published by . This book was released on 1972 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water Resources Research Catalog by :
Download or read book Water Resources Research Catalog written by and published by . This book was released on 1970 with total page 1860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydraulic Research in the United States and Canada, 1972 by : Gershon Kulin
Download or read book Hydraulic Research in the United States and Canada, 1972 written by Gershon Kulin and published by . This book was released on 1974 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water Resources Research Catalog by : United States. Office of Water Research and Technology
Download or read book Water Resources Research Catalog written by United States. Office of Water Research and Technology and published by . This book was released on 1972 with total page 1590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with vol. 9, only new and continuing but modified projects are listed. Vols. 8- should be kept as a record of continuing but unchanged projects.
Book Synopsis Root Zone Water Quality Model by : Lajpat Ahuja
Download or read book Root Zone Water Quality Model written by Lajpat Ahuja and published by Water Resources Publication. This book was released on 2000 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication comes with computer software and presents a comprehensive simulation model designed to predict the hydrologic response, including potential for surface and groundwater contamination, of alternative crop-management systems. It simulates crop development and the movement of water, nutrients and pesticides over and through the root zone for a representative unit area of an agricultural field over multiple years. The model allows simulation of a wide spectrum of management practices and scenarios with special features such as the rapid transport of surface-applied chemicals through macropores to deeper depths and the preferential transport of chemicals within the soil matrix via mobile-immobile zones. The transfer of surface-applied chemicals (pesticides in particular) to runoff water is also an important component.
Book Synopsis Journal of Soil and Water Conservation by :
Download or read book Journal of Soil and Water Conservation written by and published by . This book was released on 2008 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vol. 25, no. 1 contains the society's Lincoln Chapter's Resource conservation glossary.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Watershed Management for Potable Water Supply by : National Research Council
Download or read book Watershed Management for Potable Water Supply written by National Research Council and published by National Academies Press. This book was released on 2000-02-17 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1997, New York City adopted a mammoth watershed agreement to protect its drinking water and avoid filtration of its large upstate surface water supply. Shortly thereafter, the NRC began an analysis of the agreement's scientific validity. The resulting book finds New York City's watershed agreement to be a good template for proactive watershed management that, if properly implemented, will maintain high water quality. However, it cautions that the agreement is not a guarantee of permanent filtration avoidance because of changing regulations, uncertainties regarding pollution sources, advances in treatment technologies, and natural variations in watershed conditions. The book recommends that New York City place its highest priority on pathogenic microorganisms in the watershed and direct its resources toward improving methods for detecting pathogens, understanding pathogen transport and fate, and demonstrating that best management practices will remove pathogens. Other recommendations, which are broadly applicable to surface water supplies across the country, target buffer zones, stormwater management, water quality monitoring, and effluent trading.