ACTIVE FLOOD HAZARD MITIGATION. II: OMNIDIRECTIONAL WAVE CONTROL

Active mitigation of unimodal flood waves is achieved by selective boundary flow withdrawal. This is shown to create omnidirectional depression waves that can reduce the impact of hazardous flood waves in wide rivers, harbors, and reservoirs. Boundary outflow is induced by a deliberate levee breach or through an emergency side channel spillway generating disturbances that reflect on the banks of the channel, further complicating the wave pattern. An adjoint sensitivity method based on the two-dimensional shallow-water equations is presented to aid in the mitigation of an extreme flooding event by identifying optimal locations and times for the selective withdrawal of flood waters. The efficiency of the method allows adaptive flood control to proceed in real time. It is shown that wave reflections from solid boundaries create a complex pattern of sensitivity waves and multiple options for control. The adjoint sensitivity results become less accurate as the magnitude and duration of the perturbation become large. However, the adjoint sensitivities provide reliable information for identifying optimal locations and times for a selective withdrawal of large magnitude and a fair indication of the spatial dependence of the objective function sensitivity to large changes in flow.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8672558
• Supplemental Notes:
  • The research leading to this paper was funded by the National Science Foundation (Grant No. BCS-9220663) and the University of California Water Resources Center (Grant No. W-908).
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Sanders, Brett F
  • Katopodes, N D
• Publication Date: 1999-10

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1071-83
• Serial:
  • Journal of Hydraulic Engineering
  • Volume: 125
  • Issue Number: 10
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9429
  • Serial URL: https://ascelibrary.org/journal/jhend8

Subject/Index Terms

• TRT Terms: Adaptive control; Channel flow; Channels (Waterways); Flood plains; Flood protection; Flood routing; Harbors; Levees; Mathematical models; Perturbation theory; Real time control; Reservoirs; Rivers; Sensitivity analysis; Spillways; Waves
• Subject Areas: Highways; Hydraulics and Hydrology; Marine Transportation; Terminals and Facilities; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00770132
• Record Type: Publication
• Contract Numbers: NOOO14-94-1-0752, BCS-9220663, W-908
• Files: TRIS
• Created Date: Oct 10 1999 12:00AM