coefficient of roughness
61Éolienne — Pour les articles homonymes, voir Éolienne (homonymie). Une éolienne est un dispositif qui transforme l énergie cinétique du vent en énergie mécanique puis, éventuellement, en énergie électrique. Les éoliennes produisant de l électricité sont… …
62lake — lake1 /layk/, n. 1. a body of fresh or salt water of considerable size, surrounded by land. 2. any similar body or pool of other liquid, as oil. 3. (go) jump in the lake, (used as an exclamation of dismissal or impatience.) [bef. 1000; ME lak(e) …
63Lake — /layk/, n. Simon, 1866 1945, U.S. engineer and naval architect. * * * I Relatively large body of slow moving or standing water that occupies an inland basin. Lakes are most abundant in high northern latitudes and in mountain regions, particularly …
64electrochemical reaction — ▪ chemistry Introduction any process either caused or accompanied by the passage of an electric current and involving in most cases the transfer of electrons between two substances one a solid and the other a liquid. Under ordinary… …
65Manning N — after Robert Manning. A formula of river velocity: v = (R0.67 x S0.5) / n where R is hydraulic radius, S is channel slope and n is Manning roughness coefficient …
66Manning equation — An equation used to compute the velocity of uniform flow in open channel: V=1.486/n R2/3 S1/2, where V is the mean velocity of flow (in cfs units), R is the hydraulic radius in feet, S is the slope of the channel or sine of the slope angle,… …
