The TRRL hydrograph method is a surface water sewer design method widely used in the United Kingdom, the country for which it was developed. It is simple and economic to apply requiring relatively few input data. For this reason attempts have been made to apply it either in its original form or with various modifications in other countries. In this paper a simple modification is described which has been developed at the Transport and Road Research Laboratory, UK, to enable the method to be applied in East Africa where, unlike the United Kingdom, run-off from unpaved areas can make a significant contribution to peak flows. This simple modification should make the method generally applicable in the tropics when suitable data are available. The method still requires few and simple input data, which is an immense advantage in regions where methods requiring far more information are impracticable. The application of the method is therefore examined to arrive at recommended values for the necessary parameters in parts of the tropics for which experimental verification is not yet available. (TRRL)

Media Info

  • Features: References; Tables;
  • Pagination: p. 243-255

Subject/Index Terms

Filing Info

  • Accession Number: 00324973
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0 7273 2102 1
  • Files: ITRD, TRIS
  • Created Date: May 21 1989 12:00AM