The stage (or gage height) of a stream, canal, lake, or other body of water is simply the height of the water surface above some datum. The head of a water meausurement structure can be defined similarly.
user/addons/seo_lite/mod.seo_lite.php, line 206
The stage (or gage height) of a stream, canal, lake, or other body of water is simply the height of the water surface above some datum. The head of a water meausurement structure can be defined similarly.