Two-stage Ditch

You are here

Two-stage Ditch

A two-stage ditch is an alternative to the conventional trapezoidal design in which the ditch consists of a small main channel and floodplain benches with vegetation. During flooding, water overflows from the main channel into the floodplain benches where the vegetation slows down the water and uptakes nutrients. Compared to a trapezoidal design, a two-stage ditch reduces erosion, reduces flooding, helps reduce nitrate and phosphorus concentration in the water by plant update. Overall, two-stage ditches have been shown to be a more sustainable and eco-friendly design for drainages ditches.

 

 

More information:

USDA NRCS National Engineering Handbook: Two-Stage Channel Design