Characterizing the Fabric of the Urban Environment: A Case Study of Sacramento, California

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Description

To estimate the impact of light-colored surfaces (roofs and pavements) and urban vegetation (trees, grass, shrubs) on meteorology and air quality of a city, it is essential to accurately estimate the fraction of various urban surfaces. In this report, we estimate the fabric of Sacramento by analyzing high-resolution (0.30-m) aerial color photographs of about 65 square km of the urban area. The analysis show that in downtown Sacramento, vegetation as seen from above the canopy covers 30% of the area, whereas roofs cover 23% and paved surface 41%. Under-the-canopy fabric consists of 52% paved surfaces, 26% roofs, and 12% grass. ... continued below

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Medium: P; Size: 54 pages

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Akbari, Hashen; Rose, L. Shea & Taha, Haider December 1, 1999.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 18 times . More information about this report can be viewed below.

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Description

To estimate the impact of light-colored surfaces (roofs and pavements) and urban vegetation (trees, grass, shrubs) on meteorology and air quality of a city, it is essential to accurately estimate the fraction of various urban surfaces. In this report, we estimate the fabric of Sacramento by analyzing high-resolution (0.30-m) aerial color photographs of about 65 square km of the urban area. The analysis show that in downtown Sacramento, vegetation as seen from above the canopy covers 30% of the area, whereas roofs cover 23% and paved surface 41%. Under-the-canopy fabric consists of 52% paved surfaces, 26% roofs, and 12% grass. In the industrial areas, vegetation covers 8-14% of the area, roofs cover 19-23%, and paved surfaces cover 29-44%. The surface-type percentages in the office areas are 21% trees, 16% roofs, and 49% paved surfaces. In commercial areas,vegetation covers 5-20%, roofs 19-20%, paved surfaces 44-68%. Residential areas exhibit a wide range of percentages of surface-types . On average, vegetation covers about 36% of the area, roofs cover about 20%, and paved surfaces about 28%. Trees mostly shade streets, parking lots, grass, and sidewalks. Under the canopy the percentage of paved surfaces is significantly higher. In most non-residential areas, paved surfaces cover 50-70% of the area. In residential areas, on average, paved surfaces cover about 35% of the area. For an area of roughly 800 sq. km, defining most of metropolitan Sacramento, about half is residential. The total roof area is about 150 sq. km and the total paved surfaces (roads, parking areas, sidewalks) is about 310 sq. km. The total vegetated area is about 230 sq. km.

Physical Description

Medium: P; Size: 54 pages

Notes

OSTI as DE00764362

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  • Other Information: PBD: 1 Dec 1999

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  • Report No.: LBNL--44688
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/764362 | External Link
  • Office of Scientific & Technical Information Report Number: 764362
  • Archival Resource Key: ark:/67531/metadc724407

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • December 1, 1999

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • Sept. 21, 2017, 3:19 p.m.

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Akbari, Hashen; Rose, L. Shea & Taha, Haider. Characterizing the Fabric of the Urban Environment: A Case Study of Sacramento, California, report, December 1, 1999; California. (digital.library.unt.edu/ark:/67531/metadc724407/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.