Author:
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 6
Book Description
Mixing Heights, Wind Speeds, and Potential for Urban Air Pollution Throughout Contiguous United States, Errata
Mixing Heights, Wind Speeds, and Potential for Urban Air Pollution Throughout the Contiguous United States
Author: George C. Holzworth
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 140
Book Description
The mixing-layer height and the average wind speed within the mixing layer were calculated twice for each day of a 5-year record of upper air observations at 62 National Weather Service stations int he contiguous United States. The times of day of these calculations are morning and mid-afternoon. A rough allowance was made for effects of the urban "heat island" on the morning mixing heights. The morning and afternoon times coincide approximately with those of maximum and secondary minimum concentrations of slow-reacting pollutants in cities. These calculations illustrate the typical large diurnal variation in atmospheric dispersion. Twenty charts present seasonal and annual, and morning and afternoon mean mixing heights and wind speeds. A model of some general dispersion features over urban areas is described in which the normalized pollutant concentration averaged over a city is a function of mixing height, wind speed, and city size (distance the wind travels across the city). Frequency values of mixing height by wind speed are used with the model to calculate average normalized concentration frequencies for each weather station. Thirty charts present isopleth analyses of seasonal and annual, and morning and afternoon normalized pollutant concentrations that were exceeded 10, 25, and 50 percent of the time for specified city sizes. The occurrence of episodes during which upper limits on mixing height and wind speed were not exceeded were determined from the daily morning and afternoon values of these parameters. Isopleths of the total number of episode-days for episodes lasting at least 2 days and at least 5 days with various limiting mixing-height and wind-speed values are presented in 20 charts.
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 140
Book Description
The mixing-layer height and the average wind speed within the mixing layer were calculated twice for each day of a 5-year record of upper air observations at 62 National Weather Service stations int he contiguous United States. The times of day of these calculations are morning and mid-afternoon. A rough allowance was made for effects of the urban "heat island" on the morning mixing heights. The morning and afternoon times coincide approximately with those of maximum and secondary minimum concentrations of slow-reacting pollutants in cities. These calculations illustrate the typical large diurnal variation in atmospheric dispersion. Twenty charts present seasonal and annual, and morning and afternoon mean mixing heights and wind speeds. A model of some general dispersion features over urban areas is described in which the normalized pollutant concentration averaged over a city is a function of mixing height, wind speed, and city size (distance the wind travels across the city). Frequency values of mixing height by wind speed are used with the model to calculate average normalized concentration frequencies for each weather station. Thirty charts present isopleth analyses of seasonal and annual, and morning and afternoon normalized pollutant concentrations that were exceeded 10, 25, and 50 percent of the time for specified city sizes. The occurrence of episodes during which upper limits on mixing height and wind speed were not exceeded were determined from the daily morning and afternoon values of these parameters. Isopleths of the total number of episode-days for episodes lasting at least 2 days and at least 5 days with various limiting mixing-height and wind-speed values are presented in 20 charts.
Mixing Heights, Wind Speeds, and Potential for Urban Air Pollution Throughout the Contiguous United States
Author: George C. Holzworth
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 199
Book Description
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 199
Book Description
Ecological Research Series
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1932
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1932
Book Description
Meteorological monitoring guidance for regulatory modeling applications
Author:
Publisher: DIANE Publishing
ISBN: 1428901949
Category : Air quality
Languages : en
Pages : 171
Book Description
Publisher: DIANE Publishing
ISBN: 1428901949
Category : Air quality
Languages : en
Pages : 171
Book Description
Environmental Concerns
Author: Janet L. Burk
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 232
Book Description
1187 numbered entries to literature intended for personnel involved with problems and protection of the environment. Citations arranged under 9 topical chapters, e.g., Air pollution, Solid waste, and Water pollution. Entry gives number, bibliographical information, Superintendent of Documents number, issuing agency, and Monthly Catalog entry number. Includes list of abbreviations for issuing agencies. Author, subject indexes.
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 232
Book Description
1187 numbered entries to literature intended for personnel involved with problems and protection of the environment. Citations arranged under 9 topical chapters, e.g., Air pollution, Solid waste, and Water pollution. Entry gives number, bibliographical information, Superintendent of Documents number, issuing agency, and Monthly Catalog entry number. Includes list of abbreviations for issuing agencies. Author, subject indexes.
Superconducting Super Collider Site Selection
Superconducting Super Collider
Author:
Publisher:
ISBN:
Category : Environmental impact statements
Languages : en
Pages : 856
Book Description
Publisher:
ISBN:
Category : Environmental impact statements
Languages : en
Pages : 856
Book Description
Gravel Roads
Author: Ken Skorseth
Publisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 112
Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Publisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 112
Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.