Sure that can work large scale, say you're limited to a 2 acre plot, you going to reduce your capacity on said land by 30% just so you can store more water in said.. channel or are you going to raise just 5% with...sand bags followed by a hugalkulture method to encourage root and vegetative growth to make a more natural solid wall. Soldiers are not designed to be thinkers... especially the Army. That would be Navy/Airforce/Spaceforce... My wife was in the army, national guard as well. She would also agree with my assessment. Although lol she isnt a uhh "fancy name for a ditch digger". Her MOS was MP.
@GothCookie Welcome to the playing field.