Swale Sizing Calculator

Calculate swale dimensions for surface water drainage.

Surface area measurement (length × width for rectangles).
acres
Value expressed as parts per 100.
%
Enter the design storm value for this calculation.
in/hour

Results

Top Width:
Calculated top width based on your inputs.
-ft
Swale Depth:
Calculated swale depth based on your inputs.
-inches
Flow Capacity:
Maximum amount that can be handled.
-cubic ft/sec
Reference: Industry Standards.