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This report reviews more than 35 TMDL models and procedures for estimating the maximum amount of a pollutant that a water body can receive and still meet applicable water quality standards.
"MOP 150 provides detailed descriptions of several watershed and receiving water quality models used in total maximum daily load (TMDL) analysis and modeling, highlighting recent advancements in TMDL development and implementation"--
Prepared by the Total Maximum Daily Load Analysis and Modeling Task Committee and sponsored by the Watershed Management Technical Committee of the Watershed Council of the Environmental and Water Resources Institute of ASCETotal Maximum Daily Load Development and Implementation: Models, Methods, and Resources, MOP 150, describes the state of the practice and provides guidance to practitioners in selecting analytical tools and models in the development of a total maximum daily load (TMDL) and its implementation plan. The MOP includes detailed descriptions of a variety of watershed and receiving water quality models that can be used, highlighting recent advances in TMDL analysis and modeling.This Manual of Practice includes the following topics:Watershed models;Receiving water models;Integrated modeling systems and linked models;Simple models and methods;Critical condition determination for TMDL modeling;Model data, geographic information systems, and remote sensing;Model calibration and validation;Model uncertainty analysis and margin of safety;USEPA TMDL report archive and report search tool;Model selection and applications for TMDL development; andModeling for TMDL implementation.MOP 150 serves as a reference and resource for those engaged in the practice of TMDL analysis and modeling, including engineers, water quality professionals, regulators, and other water resource and watershed managers charged with development and implementation of TMDLs.
"This manual contains overview information on treatment technologies, installation practices, and past performance."--Introduction.
MOP 150 provides detailed descriptions of several watershed and receiving water quality models used in total maximum daily load (TMDL) analysis and modeling, highlighting recent advancements in TMDL development and implementation.
New York City's municipal water supply system provides about 1 billion gallons of drinking water a day to over 8.5 million people in New York City and about 1 million people living in nearby Westchester, Putnam, Ulster, and Orange counties. The combined water supply system includes 19 reservoirs and three controlled lakes with a total storage capacity of approximately 580 billion gallons. The city's Watershed Protection Program is intended to maintain and enhance the high quality of these surface water sources. Review of the New York City Watershed Protection Program assesses the efficacy and future of New York City's watershed management activities. The report identifies program areas that may require future change or action, including continued efforts to address turbidity and responding to changes in reservoir water quality as a result of climate change.
The rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.