Non-stationary flow solution for water levels in open channels for TOXSWA

J.H.J. van Opheusden, J. Molenaar, W.H.J. Beltman, P.I. Adriaanse

Research output: Book/ReportReportProfessional


We study non-stationary flow in open discharge channels. A model is derived from basic principles, conservation of mass and momentum, which is solved numerically for the cross sectional area and discharge as a function of time and position along the channel. The model describes the effect of external inflow from fields adjacent to the channel. Several scenarios are calculated, both for very slowly, and more rapidly flowing water courses.
Original languageEnglish
Place of PublicationWageningen
Number of pages41
Publication statusPublished - 2011

Publication series

ISSN (Print)1566-7197


  • ditches
  • water pollution
  • surface water
  • pesticides
  • models


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