Correcting Transit Time Distributions in Coarse MODFLOW-MODPATH Models

Research output: Contribution to journalArticlepeer-review


In low to medium resolution MODFLOW models, the area occupied by sink cells often far exceeds the surface area of the streams they represent. As a result, MODPATH will calculate inaccurate particle traces and transit times. A frequency distribution of transit times for a watershed will also be in error. Such a distribution is used to assess the long-term impact of nonpoint source pollution on surface waters and wells. Although the inaccuracies for individual particles can only be avoided by increased model grid resolution or other advanced modeling techniques, the frequency distribution can be improved by scaling the particle transit times by an adjustment factor during post-processing.

Original languageEnglish (US)
Pages (from-to)474-478
Number of pages5
Issue number3
StatePublished - May 2013
Externally publishedYes

ASJC Scopus subject areas

  • Water Science and Technology
  • Computers in Earth Sciences


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