Riverbank
Brahmaputra Riverbank Restoration
A scoured reach of the Brahmaputra system where the toe had been undercut and the bank was failing in blocks. The bank was cut back to a stable designed slope, a non-woven geotextile filter laid with full overlap, and a sand-filled geo-bag revetment placed on the slope with a launching apron at the toe sized against the anticipated scour.
The apron is the part that matters. It is built to fall — as the bed scours, the bags roll down and armour the hole instead of leaving the revetment hanging.