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Section S S index 741-749 of 1376 terms
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specific absorption—Same as specific capacity.
specific attenuation—See attenuation coefficient.
specific capacity—The ratio of discharge into a recharge well to the rise of head at equilibrium.
specific conductance—Measurement of the ability of soil water to conduct electricity, usually expressed in units of siemens per meter or millimhos per centimeter. Specific conductance is related to the concentration of ions in the water and is used to estimate the concentration of dissolved solids in the water.
specific discharge—1. In surface water hydrology, discharge per unit area of an upstream watershed.2. In open channel flow, discharge per unit width of channel. 3. In groundwater, the volumetric flow rate per unit area of a porous media, also known as flow velocity or specific flux; if computed using Darcy's law, known as Darcy's flux.
specific energy—In hydrology, the total energy per unit weight of fluid, at any cross section of a channel, measured above the channel bottom. The equation for specific energy, E, is where y is the depth of flow, v is the average velocity, and g is the gravitational attraction.
specific enthalpy—See enthalpy.
specific entropy—See entropy.
specific flux—Same as specific discharge.
specific gravity—The ratio of the density of a substance to the density of water, usually determined at 4°C.
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