THE TRRL EAST AFRICAN FLOOD MODEL

Four years of data from 13 small representative rural catchments in Kenya and Uganda were analysed to develop improved methods of flood estimation for highway bridges and culverts. Due to the short period of record and the very quick response time of the catchments, unit hydrograph techniques were found inappropriate. A technique which made better use of limited data, therefore, had to be developed. Rainfall and runoff data were fitted to a simple three parameter conceptual catchment model. The model was then used to predict the 10 year flood using a 10 year design storm. A simple technique is then developed for predicting the peak flow and base time of design hydrographs for ungauged catchments.(a) /TRRL/

• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Fiddes, D
• Publication Date: 1976

Media Info

• Features: Figures; References; Tables;
• Pagination: 41 p.

Subject/Index Terms

• TRT Terms: Culverts; Data collection; Design storm; Drainage basins; Floods; Flow; Forecasting; Highway bridges; Hydrographs; Hydrologic phenomena; Hydrology; Mathematical models; Rain; Rainfall; Runoff; Rural areas; Surface drainage; Weather forecasting
• Uncontrolled Terms: Parameters
• Geographic Terms: Africa; Kenya; Uganda
• Old TRIS Terms: Highway drainage
• ITRD Terms: 8001: Africa; 6471: Analysis (math); 4318: Catchment area (hydrol); 3360: Culvert; 8655: Data processing; 4323: Discharge (flow); 2569: Flooding; 132: Forecast; 4332: Hydrology; 8055: Kenya; 6473: Mathematical model; 9042: Maximum; 9102: Method; 2507: Rain; 4329: Run off; 328: Rural area; 5414: Time; 8118: Uganda
• Subject Areas: Bridges and other structures; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00138936
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: TRRL LR 706
• Files: ITRD, TRIS
• Created Date: Nov 17 1976 12:00AM