Volume of sump storage

Volume of surface water runoff

Velocity at center of concentric rings of equal area in measuring flow with a Pitot tube

Volume of water drained in specific yield test

Penetration of a drainage well, slot, or cutoff wall in a homogeneous isotropic aquifer, penetration of a

between water table in a cofferdammed area and base of the sheet piling or cutoff wall, or size of

flume in the measurement of flow with a Parshall flume

Effective depth of penetration of a drainage slot or well into aquifer

Exponential integral termed a "well function"

Length of a drainage slot, distance from center line of excavation to sheet pile or cutoff wall, or distance

along axis of a discharge pipe to a point in the stream in jet-flow measurement

Distance from drainage slot to a specific line, actual vertical dimension in an anisotropic stratum, or dis-

tance perpendicular to the axis of a discharge pipe to a point in the stream in jet-flow measurement

Transformed vertical dimension in an anisotropic stratum

Depth of soil stabilized by electroosmosis, or height of crest above bottom of approach channel in weir-

flow measurement

Gamma function for determining G

Unit weight of water

Change in piezometric head for a particular seepage length; drawdown; artesian head above bottom of

slope or excavation

Maximum head landward from a line of wells above head at wells

Head midway between wells above that at a well

Change in drawdown during pump test between two different pumping rates

Pressure differential

Drawdown in feet per cycle of (log) time-drawdown curve in pump test

Residual drawdown in feet per cycle of (log) t'/t"

Submerged unit weight of soil

Uplift factor for artesian wells or wellpoints

Midpoint uplift factor for artesian wells or wellpoints

Extra-length coefficient for flow to a partially penetrating drainage slot

Absolute viscosity of air

Absolute viscosity of water

Specific resistance to electrolyte

Geometric shape factor (dimensionless)

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