Critical Depth, Trapezoid

Critical depth, trapezoid.
Problem in calculating the critical depth with the formula is that the width (B) is changing with the water depth. So to find the critical depth, you have to look for the lowest H in the excel file
Preconditions: cross section is a trapezoid
Spreadsheet for online calculations.
Sometimes the spreadsheet does not load, this because it is an external website. So don’t worry and try later.
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