EFFECTS OF SEDIMENT ON DRAINAGE-CULVERT SERVICEABILITY

The flow of a drainage culvert can be greatly impaired or completely lost due to the presence of deposited sediments. The total head loss within the culvert due to sediments can be quite significant. A case study is presented that reviews the performance of a highway drainage culvert, which is designed for clear-water flow conditions in an alluvial stream carrying sediments. Culvert capacity, though, is only 20 percent of the presumed design capacity as a result of sediment deposition. This case study reviews design errors and emphasizes the necessity of sediment-transport computations when designing roadway drainage culverts in ephemeral alluvial streams. Adverse effects, such as road and adjacent-property flooding, can result when sediment transport is ignored. The most economic course of action is a complete sediment-transport study before design, rather than continuous maintenance costs after construction.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00681607
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 30 1995 12:00AM