Download or read book The role of sediment water interaction in the riverine transport of pesticides written by W A. House and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pesticides in Stream Sediment and Aquatic Biota written by Lisa H. Nowell and published by CRC Press. This book was released on 2019-06-12 with total page 953 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 20 years after the ban of DDT and other organochlorine pesticides, pesticides continue to be detected in air, rain, soil, surface water, bed sediment, and aquatic and terrestrial biota throughout the world. Recent research suggests that low levels of some of these pesticides may have the potential to affect the development, reproduction,
Download or read book Nutrients Suspended Sediment and Pesticides in Waters of the Red River of the North Basin Minnesota North Dakota and South Dakota 1970 90 written by Lan H. Tornes and published by . This book was released on 1994 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Source sediment controls on the riverine transport of pesticides written by W A. House and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interactions between Sediments and Water written by Brian Kronvang and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on sediments as a pollutant in natural freshwater and marine habitats, and as a vector for the transfer of chemicals such as nutrients and contaminants. Sediment-water research is carried out all over the world within a variety of disciplines. The selected papers cover three main topics relating to assessment and/or restoration of disturbed watersheds, sediment-water linkages in terrestrial and aquatic environments and evaluation of sediment and ecological changes in marine and freshwater habitats. Innovative research in both developed and less developed countries is included. Both fundamental research, insight into applied research and system management are covered. The volume will also appeal to readers involved in sediment geochemistry and dynamics, aquatic habitats, water quality, aquatic ecology, river morphology, restoration techniques and catchment management.
Download or read book Sediment Water Interactions written by B.T. Hart and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers appearing in this volume reflect the current attention in sediment/water science to five main topics of investigation: Sediment dynamics in estuaries, coastal waters, lakes, reservoirs and rivers; Sediment-associated biological processes; Contaminant accumulation, distribution and geochemistry; Fluxes from sediments; and Element cycling. Contributors address sediment/water interactions related to both fresh and salt water conditions.
Download or read book Mathematical Model SERATRA for Sediment contaminant Transport in Rivers and Its Application to Pesticide Transport in Four Mile and Wolf Creeks in Iowa written by Yasuo Onishi and published by . This book was released on 1982 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Agrochemical Transport in California s Surface Water and Retention by Vegetated Filter Strips written by Huajin Chen and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last century, use of pesticides and fertilizers has enabled a tremendous increase in agriculture productivity worldwide. At the same time, documentation of contamination and adverse effects of agrochemical residues in the environment and aquatic ecosystem grows. A mechanistic and quantitative understanding of pesticide fate and transport in agricultural fields and watersheds is essential for informed decisions on regional water quality management. This study focuses on modeling agrochemical transport in California’s surface water and the pesticide removal efficacy of Vegetated Filter Strips (VFS’s). First, two newly-released, widely-used, field-scale numerical models, the Root Zone Water Quality Model (RZWQM) and the Pesticide Root Zone Model (PRZM), were compared and evaluated in terms of their abilities to predict sediment and pesticide runoff from two alfalfa fields in Davis, California. A composite metric (based on R2, NSE, d, and PBIAS) was developed and employed to ensure robust, comprehensive assessment of model performance. The RZWQM and PRZM models predicted surface water runoff reasonably well (absolute percent bias 31%) after adjusting important hydrologic parameters but with a consistent underestimation bias (-89% ≤ percent bias ≤ -36%) for sediment yield. Chlorpyrifos losses were simulated with reasonable accuracy especially for field A (absolute percent bias ≤ 22%), whereas diuron losses were underestimated to a great extent (-98% ≤ percent bias ≤ -65%) by both models. Based on this study, both RZWQM and PRZM performed well in predicting runoff that carried moderately adsorbed pesticides on an event basis, although the more physically based RZWQM is recommended when field-measured soil hydraulic properties are available. Next, to quantify VFS efficacy in reducing pesticide runoff, a meta-regression model was developed based on hydrologic responses of VFS’s, incoming pollutant characteristics, and interactions within and between these two factor groups (Q2 = 0.83). In cross-validation analysis, the developed model (Q2 = 0.81) outperformed the existing pesticide retention module of VFSMOD (Q2 = 0.72) by explicitly accounting for interaction effects and the categorical effect of pesticide adsorption properties. Based on the 181 data points studied, infiltration had a leading and positive influence on pesticide retention, followed by sedimentation and interactions between the two. Interactions between infiltration and pesticide adsorption properties were prominent, and the clay content of incoming sediment was negatively associated with pesticide retention. Next, we applied the Soil and Water Assessment Tool (SWAT) to watershed-scale simulation of pesticide fate and transport in the agriculturally intensive San Joaquin River watershed. This watershed is a major contributor to elevated pesticide levels in the downstream Sacramento-San Joaquin Delta where a biological weed control plan is under development. The Sequential Uncertainty Fitting version 2 algorithm was employed to perform calibration and uncertainty analyses. A combination of performance measures and standardized performance evaluation criteria was applied to evaluate model performance, and prediction uncertainty was quantified using the 95% Prediction Uncertainty band (95PPU). Results showed that streamflow simulation was at least “satisfactory” at most stations, with more than 50% of the observed data bracketed by the 95PPU. Sediment simulation was rated as at least “satisfactory” based on two performance measures, and diuron simulation was judged as “good” by all performance measures. The 95PPU of sediment and diuron bracketed about 40% and 30% of the observed data, respectively. Results also showed that the majority ( 70%) of agricultural diuron was transported during winter months, when direct exposure of biocontrol agents to diuron runoff is limited. Finally, the SWAT model together with the Sequential Uncertainty Fitting version 2 algorithm were applied to model riverine nitrate-nitrogen loads in the San Joaquin River watershed, where part of the area is poorly drained. We found that the new tile drainage routine in SWAT significantly improved nitrate load simulations. Nitrate simulations were rated as at least “satisfactory” for all the monitoring stations based on R2 and PBIAS. The P-factor was more than 0.5 and the average R-factor was about 1.2, indicating that a balance was reached between uncertainty measures and the strength of calibration. The major sources of uncertainty include the lack of information regarding the timing and magnitude of fertilizer and manure applications. The SWAT simulation indicated that 40% of riverine nitrate loads in the San Joaquin River watershed came from tile drainage nitrate. The San Joaquin River plays an important role in supplying nitrogen to the Delta by exporting 3,150 tons of nitrate-nitrogen annually. In summary, results from this dissertation indicate that: (1) preferential flow through macropore is an important transport pathway in undisturbed soil and mechanistic hydrologic models should be used to account for such field conditions; (2) interactions among hydrological and pesticide adsorption processes have significant effects on VFS pesticide retention; and (3) dominant hydrologic processes and associated parameter sensitivity vary spatially, and therefore it is important to perform rigorous multi-site calibration when simulating pollutant transport across large watersheds. The study not only facilitates a deeper understanding of hydrologic processes occurring in croplands, VFS’s, and agricultural watersheds, but also serves as a foundation for the continued research on calibration, evaluation, and uncertainty analysis of spatially distributed, physically based hydrologic models.
Download or read book Sediments and Toxic Substances written by Wolfgang Calmano and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: In modern sediment research on contaminants five aspects are discussed which, in an overlapping succession, also reflect develop ment of knowledge on particle-associated pollutants during the past twenty-five years: (1) identification of sources and their distribution; (2) evaluation of solid/solution relations; (3) study of transfer mecha nisms to biological systems; (4) assessment of environment impact; and (5) selection and further development of remedial measures, in par ticular, of dredged materials. Scientific research and practical develop ment are still expanding in all these individual aspects. Similar to other waste materials, management of contaminated sed iments requires a holistic approach. This means that assessment of biogeochemical reactions, interfacial processes and transfer mecha nisms as well as the prognosis of long-term borderline conditions, in particular of capacity-controlling properties, should be an integrated part of the wider management scheme, i.e., the analytical and experi mental parameters should always be related to potential remediation options for a specific sediment problem. The underlying coordinated project, which was funded by the German Federal Ministry for Science and Technology (now the Federal Ministry for Education, Science, Research and Technology) provided excellent opportunities for multidisciplinary effort, bringing together biologists, chemists, engineers, geologists and other researchers. During its active phase, the group attracted much interest nationally and internationally. The group members highly appreciate the manifold contacts and invitations during the past five years.
Download or read book Pesticides in Surface Water Bed Sediment and Ground Water Adjacent to Commercial Cranberry Bogs Lac Du Flambeau Reservation Vilas County Wisconsin written by David A. Saad and published by . This book was released on 2005 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Freshwater Interactions written by P.G. Sly and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Second International Sediment/Freshwater Symposium held in Kingston, Ontario, June 15-18, 1981
Download or read book Pesticides in Ground and Surface Water written by Horst Börner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pesticides in ground, surface and drinking water are a hot topic under continuing discussion. This complete and authoritative volume draws together information on all key issues on the fate and behaviour of pesticides in water systems. The scope of the practice-oriented contributions and the eminence of contributing authors make it an important source for researchers and practitioners in the plant protection and crop science field.
Download or read book Pesticides in Drinking Water written by David I. Gustafson and published by Van Nostrand Reinhold Company. This book was released on 1993 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: What are the dangers of pesticide contamination in water supplies? Can the problem be eliminated? Are the available technologies adequate to remedy or alleviate the risks? What government regulations are currently in place, and how effective is the protection they offer? This comprehensive resource provides a collection of all known, up-to-date information regarding the occurrence of pesticides in drinking water. Gustafson furnishes definitive examinations regarding the different types of pesticides in drinking supplies, how they get there, and what is being done to remedy the problem. Bringing together historic data, current trends in scientific thought, regulatory tactics, and future technical strategies, Pesticides in Drinking Water provides an inclusive, single source for understanding how best to monitor and control the problem. The author provides: Case studies for a more detailed, historical perspective A review of current monitoring data Intricate descriptions of accidental spills and misuses of pesticides An explanation of the dangers of leaching and run-off from properly applied chemicals Recent surveys of drinking water quality A look at current industrial and government regulations Examples of the technology utilized to treat pesticides in water supplies An examination of new and safer pesticides This effective reference guide is invaluable for chemists and biologists in the agricultural-chemistry profession, environmental consultants and engineers, farmers, government inspectors, and regulatory managers. Presented in an accurate, technical, but fully accessible style, Pesticides in Drinking Water is also ideal for students, scholars, or any-one concerned about water quality and the environmental hazards of pesticides.
Download or read book A Study of the Physicochemical Dynamics of Pesticide sediment water Interactions Using One dimensional Numerical Diffusion Models written by Dennis Lee Corwin and published by . This book was released on 1984 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pesticides in Surface Waters written by Steven J. Larson and published by CRC Press. This book was released on 2019-04-24 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pesticde use in agriculture and non-agriculture settings has increased dramatically over the last several decades. Concern about adverse effects on the environment and human health has spurred an enormous amount of research into their environmental behavior and fate. Pesticides in Surface Waters presents a comprehensive summary of this research.
Download or read book Riparian Management in Forests of the Continental Eastern United States written by Ellen S. Verry and published by CRC Press. This book was released on 1999-12-06 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: The timing could not be better for addressing riparian area management and the resulting impacts of surface water. The Forest Service leadership team has identified water and watershed management as the issue of the upcoming decade. These factors and more have moved riparian forests to the forefront of environmental management. Riparian Management in Forests of the Continental Eastern United States gives you the tools you need to take on this task. Each day, thousands of natural resource professionals face the problems involved in managing riparian forests. The challenge: fragmented ownership, fragmented ecosystems, and diverse interest groups. The solution requires a multidisciplinary approach, drawing on a complex mix of government agencies, private interests, and local communities as exemplified in the following initiatives: Chesapeake Bay Program "Save the Bay" Inland West Water Strategy New York City Watershed Project The Pacific Habitat Strategy The Anadromous Fish Habitat Riparian Management in Forests of the Continental Eastern United States summarizes the state-of-the-art in the management of forested riparian areas. It serves as a desktop reference for natural resource administrators, educators, and on-the-ground managers from industry, consulting firms, and municipal, state, and federal agencies who routinely face the complex problems of protecting riparian areas. Features
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
