EFFECTS OF OVERBANK FLOW IN FLOOD COMPUTATIONS

The derivation and application of unsteady free surface flow equations are presented which describe floods in rivers where dynamic effects are considered in both the main channel as well as berm or overbank sections of the flood plain. Literature to date considers overbank portions of a river significant only for purposes of storage. Such an assumption is not always justified. The equations are used to describe flood conditions that occurred in 1970 in the Bicol River Basin in South Luzon, Philippines. The dynamic effects of the low in the berms is determined by comparing the computed river stages and discharges considering conditions with and without the dynamic effects of the berm flow. /Author/

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Tingsanchali, T
  • Ackernann, N L
• Publication Date: 1976-7

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 1013-25
• Serial:
  • Journal of the Hydraulics Division
  • Volume: 102
  • Issue Number: HY7
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Berms; Calculation; Dynamics; Equations; Flood plains; Floods; Flow; Free surface; Stream channels; Streamflow; Streams; Water
• Uncontrolled Terms: Computation; Stream channels
• Old TRIS Terms: Discharge
• Subject Areas: Highways; Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00139584
• Record Type: Publication
• Report/Paper Numbers: ASCE #1226
• Files: TRIS
• Created Date: Oct 6 1976 12:00AM