HOW TO ADD LATERAL STRUCTURE (LEVEE) IN HEC RAS?

Some definitions before adding lateral structure in HEC RAS- 

Centerline: It represents line joining deepest point of the cross-section (i.e. along Thalweg)

Bank line: It separates river and the bank of river

Flow path line: This line represents the center of mass of flowing water

In the channel when drawn at center of mass of water in the channel

Over the left bank when drawn at center of mass of water on LOB

Over the right bank when drawn at center of mass of water on ROB

Flow path line is used to calculate the distance of downstream cross-section of channel, LOB and ROB

Cross-section line: Draw cross-section lines from left to right bank looking in the downstream direction

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