Author: Andrew W. ClevengerPublisher:
ISBN:
Category : Contaminated sediments
Languages : en
Pages : 248
Book Description
Importance of Sediment Size Class Information for Modeling Particle Bound Contaminant Transport During Floods
Author: Andrew W. ClevengerPublisher:
ISBN:
Category : Contaminated sediments
Languages : en
Pages : 248
Book Description
Sediment and Contaminant Transport in Surface Waters
Author: Wilbert LickPublisher: CRC Press
ISBN: 1420059882
Category : Science
Languages : en
Pages : 416
Book Description
Contaminated bottom sediments and their negative impacts on water quality are a major problem in surface waters throughout the United States as well as in many other parts of the world. Even after elimination of the primary contaminant sources, these bottom sediments will be a main source of contaminants for many years to come. In order to determin
Bioavailability of Contaminants in Soils and Sediments
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309086256
Category : Technology & Engineering
Languages : en
Pages : 433
Book Description
Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. The concept of bioavailability has recently piqued the interest of the hazardous waste industry as an important consideration in deciding how much waste to clean up. The rationale is that if contaminants in soil and sediment are not bioavailable, then more contaminant mass can be left in place without creating additional risk. A new NRC report notes that the potential for the consideration of bioavailability to influence decision-making is greatest where certain chemical, environmental, and regulatory factors align. The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. Finally, the intimate link between bioavailability and bioremediation is explored. The report concludes with suggestions for moving bioavailability forward in the regulatory arena for both soil and sediment cleanup.
Sediment Dynamics and Pollutant Mobility in Rivers
Author: Bernd WestrichPublisher: Springer Science & Business Media
ISBN: 3540347852
Category : Science
Languages : en
Pages : 463
Book Description
This is the first interdisciplinary book on the mobilization of nutrients and pollutants in the water phase due to hydrodynamic processes. Coverage includes the formation of aggregates in turbulent water; flocks and biofilms from organic reactions; and the formation of new surfaces for re-adsorption of dissolved pollutants. The book gathers papers resulting from an International Symposium on Sediment Dynamics and Pollutant Mobility in River Basins in Hamburg, Germany, March, 2006.
Mathematical Model SERATRA, for Sediment-contaminant Transport in Rivers and Its Application to Pesticide Transport in Four Mile and Wolf Creeks in Iowa
Author: Yasuo OnishiPublisher:
ISBN:
Category : Pesticides
Languages : en
Pages : 74
Book Description
Modeling Remobilization of Sediment-bound Contaminants in Sediments and Their Fate and Transport in Overlying Waters
Author: Byunggi HwangThe Effects of Grain Size Heterogeneity on Sediment Transport Modeling
Author: Ross Steven WickhamPublisher:
ISBN:
Category : Sediment transport
Languages : en
Pages :
Book Description
Sediment Classification Methods Compendium
Author: United States. Environmental Protection Agency. Sediment Oversight Technical CommitteePublisher:
ISBN:
Category : Environmental protection
Languages : en
Pages : 234
Book Description
This document is a compendium of scientifically valid and accepted methods that can be used to assess sediment quality and predict ecological impacts...the intent here is to provide the most useful overall measures or predictors of ecological impacts currently in use rather than procedures that may have limited application outside of a particular regulatory framework... parag The information provided in the compendium on the relative strengths and weaknesses of the different assessment methods can provide assistance in selecting the appropriate methods.
Characterizing Sediment Transport in Two Watersheds Using CCHE1D Sediment Transport Model
Author: Kezhen (Jenny) WangPublisher:
ISBN: 9780438629462
Category :
Languages : en
Pages :
Book Description
Sediment is usually considered an integral part of water quality in river systems. Understanding sediment transport mechanisms is crucial for studying the fate and transport of sediment-facilitated contaminants. In order to understand sediment transport processes, a channel network model, CCHE1D, was first applied for a sensitivity analysis on simulation parameters and options at the Goodwin Creek watershed, Mississippi. The sensitivity analysis evaluated Manning's roughness coefficient, bed sediment class distribution, bankerosion and different sediment transport capacity formulas by comparing hydrology and sediment results with original data from model developers. A simulation model of the Cache Creek watershed, California was then developed to study the streamflow, and to estimate downstream sediment yield in the main channel between Rumsey and Yolo. A nonlinear relation between flow discharge and sediment yield was obtained by the sensitivity analysis, which also showed that different sediment size class had different sensitivity level towards simulation parameters and options. The sensitivity analysis results suggested that having sufficient and detailed sediment data, even in a short period of time, could be beneficial for obtaining accurate sediment yield estimation downstream. The simulation model at Cache Creek watershed was calibrated for hydrology with r2 value of 0.78; Nash-Coefficient of 0.78 and sediment yield with r2 value of 0.70; Nash-Coefficient of 0.70. It was then validated for hydrology with r2 value of 0.95; Nash-Coefficient of 0.93 and sediment yield with r2 value of 0.59; Nash-Coefficient of 0.57. The model was then applied to reconstruct 10-year suspended sediment data at Yolo based on available hydrology data and limited short-term sediment data. The results can be useful for studies at Cache Creek Settling Basin, which are important for controlling sediment entrapment and preventing spread of mercury contamination to San Francisco Bay-Delta area.
Managing Wastewater in Coastal Urban Areas
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309048265
Category : Science
Languages : en
Pages : 497
Book Description
Close to one-half of all Americans live in coastal counties. The resulting flood of wastewater, stormwater, and pollutants discharged into coastal waters is a major concern. This book offers a well-delineated approach to integrated coastal management beginning with wastewater and stormwater control. The committee presents an overview of current management practices and problems. The core of the volume is a detailed model for integrated coastal management, offering basic principles and methods, a direction for moving from general concerns to day-to-day activities, specific steps from goal setting through monitoring performance, and a base of scientific and technical information. Success stories from the Chesapeake and Santa Monica bays are included. The volume discusses potential barriers to integrated coastal management and how they may be overcome and suggests steps for introducing this concept into current programs and legislation. This practical volume will be important to anyone concerned about management of coastal waters: policymakers, resource and municipal managers, environmental professionals, concerned community groups, and researchers, as well as faculty and students in environmental studies.