# Volume of Water

Written by Jerry Ratzlaff on . Posted in Geotechnical Engineering

## Volume of water formulas

 $$\large{ V_w = k \; i \; A_c \; t }$$ $$\large{ V_w = k \; A_c \; t \; \frac{ h_l }{ L } }$$ $$\large{ V_w = \frac{ S \; e \; V_t }{ 1 \;+\; e } }$$

### Where:

 Units English Metric $$\large{ V_w }$$ = volume of water $$\large{ft^3}$$ $$\large{m^3}$$ $$\large{ A_c }$$ = area cross-section $$\large{ft^2}$$ $$\large{m^2}$$ $$\large{ S }$$ = degree of saturation $$\large{dimensionless}$$ $$\large{ t }$$ = duration of time for collection of water $$\large{sec}$$ $$\large{s}$$ $$\large{ h_l }$$ = head loss $$\large{ft}$$ $$\large{m}$$ $$\large{ i }$$ = hydraulic gradient $$\large{dimensionless}$$ $$\large{ L }$$ = length of the sample $$\large{ft}$$ $$\large{m}$$ $$\large{ k }$$ = permeability coefficient $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$\large{ V_t }$$ = total volume of soil $$\large{ft^3}$$ $$\large{m^3}$$ $$\large{ e }$$ = void ratio $$\large{dimensionless}$$ 