Formulas Flashcards by J Shane

Q

hydrologic equation

A

inflow = outflow +/- changes in storage

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Q

evapotranspiration

A

Et = Si + Ir + Pr - Sf - De

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Q

latent heat of vaporization

A

Hv = 597.3-0.564T

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Q

work

A

W = Force x distance

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Q

Force

A

force = mass x acceleration

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Q

weight

A

weight = mass x gravity

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Q

density

A

density = mass/volume

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Q

specific weight

A

y = weight/volume
y = density x gravity

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Q

Pressure

A

P = Force / Area

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Q

Porosity

A

100 Vv/V

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Q

total porosity

A

100 [1-(Pb/Pd)]

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Q

uniformity coefficient

A

Cu = d60/d10

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Q

discharge

A

Q = -KA [(ha-hb)/L]

or

Q= -KA [dh/dl]

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Q

specific discharge

A

q = Q/A

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Q

darcy’s coefficient

A

K = -L^3/T / L^2 (L/L) = L/T

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Q

darcy

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A

(1cP)(1cm^3/s) / 1cm^2 / (1atm/1cm)

Q

transmissivity

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A

T = bK

Q

total stress

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A

Qt = P + Qe