The study investigates the use of computer-aided analysis of LANDSAT multispectral data in estimating percentage of imperviousness and associated land uses need in urban hydrologic modeling. An interactive computer was used to delineate seven land use classifications in the 132-sq mi (342-sq km) Maryland portion of the Anacostia River Basin from LANDSAT data. The land-use distributions compared favorably with those of an earlier study which obtained the same information through analysis of aerial photographs having a scale of 1:4800. The LANDSAT data were used to estimate the basin imperviousness as 25.1% while the aerial photographic study had given 23.5%. Comparisons between the photographic and LANDSAT imperviousness estimates are made for subareas within the Anacostia Basin as small as 0.14 sq mi (0.36 sq km). Approximately 94 man-days were required to complete the land-use analysis using the aerial photographs while less than 4 man-days were required to accomplish similar tasks using the LANDSAT data.

  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Authors:
    • Ragan, R M
    • Jackson, T J
  • Publication Date: 1975-12

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 1469-75
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129058
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11790 Proceeding
  • Files: TRIS
  • Created Date: Mar 10 1976 12:00AM