TM 5-818-5/AFM 88-5, Chap 6/NAVFAC P-418
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)
B-4
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