Re:Burma Shave Ads? Any idea what causes them?
Ad men.
Berm can be man made as has been pointed out.. they sometimes run along hiways, and act as sound barriers, or as Mav pointed out are used for defences.
Shore berm are natural creations of sand, wave and wind. and they are defence barriers. they are the backbones, as it were, of barrier island, and barrier islands protect the main portion of the shore line.
Flood devistate places like the hamptons and wildwood, but rarely the main portion of Long Island or NJ. Berms, 10 to 20 feet higher that normal high tide, they are protections against storm surges too.
A storm doesn't actually have to come on shore to do damage. a big storm at sea, with strong winds, can push water, the way a push broom might. when combined with high tides, you can have a wall of water, not a tidal wave, but a slow, relentless surge of water.. berms help limit the damage the surge can do.
While we have our feet wet.. can some one explain to me again, (i promise this time i'll master it!) the rule of 12?
it is about the normal volume of water that moves with each hour of a tide.. when i first heard it, i final understood why sailors in days past, "sailed with the tide".
