A computer program written in BASIC calculates net changes in stream channel cross-sections. Calculations are based on dividing the channel cross-section into discrete regions of scour and ff1. Internal boundaries of these regions (along the x-axis of the crosssection) are determined by the location of vertical depth measurements taken at two distinct times. The right and left boundaries of the cross-section can be specified so that scour or fill can be calculated for any portion of the profile desired.(KEY TERMS: computer program, BASIC, cross-section, stream channel, channel morphology.)
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