whoop de doo n.— «On the second day, we encountered 29 km of whoop-de-doos. For those unfamiliar with dirt bike vernacular, picture the harshest mogul run you’ve ever seen, lay it out horizontally, throw in some sand and you have whoops...
stringer sand n.— «After drilling to 14,280 feet, we reached what is known as a stringer sand as well as a drilling break. A stringer sand is one that has evidence of oil in the sand. A “drilling break” is defined as...
schmutzdecke n.— «This type of filter works because of a biological microbe named schmutzdecke. It grows on top of the sand and its job is to eat organisms in the water. It can take up to two weeks to form so any water before that is not...
schmutzdecke n. a naturally occurring gelatinous layer of living biological matter on a sand-based water filter, for which it provides additional filtration. Editorial Note: Occasionally spelled in English as “schmutzedecke” or...
schmutzdecke n.— «This system, introduced into the U.S. in 1872, uses low water flow rates (0.05 gpm/sq ft) and relies on the formation of a “schmutzdecke” (a fine, mud-like layer) in the top surface of the fine sand (specific...
schmutzdecke n.— «Periodically the top layer of sand (approximately 25 to 100m deep) needs to be removed from the slow sand filters together with the associated biological accumulation (“schmutzdecke”) for cleaning...