An effective conceptual approach to determining the consequences of land-use changes on flood flows, stages, and damage involves partitioning the watershed land surface into floodland and nonfloodland areas. A hydrologic-hydraulic-flood damage model consisting of a combination of continuous process and steady-state computer programs is presented as a potentially effective analytic tool. The model is used to assess the impact of seven combinations of floodland and nonfloodland development on a 136-sq mile (352-sq km) urbanizing watershed in southeastern Wisconsin. Under conditions of complete urganization of the presently undeveloped floodland and nonfloodland areas in the watershed the 100-yr flood discharge may be expected to increase, relative to existing conditions, by a median factor of 1.0; the predicted median increase in 100-yr flood stages is 4.5 ft (1.4-m); and average annual flood damage for four flood-prone reaches may be expected to increase by factors of 2.4 to 8.5. /Author/

  • Supplemental Notes:
    • This paper was presented at the ASCE Hydraulics Division Specialty Conference, LaFayette, Indiana, August 4-7, 1976.
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Authors:
    • Walesh, S G
    • Videkovich, R M
  • Publication Date: 1978-2

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 141-155
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00174398
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 13553 Proceeding
  • Files: TRIS
  • Created Date: Jun 14 1978 12:00AM