Physical parameters (13): conservation of mass

G = rmixt . w. S = constant

mass flux: G (kg/s)

w: velocity (m/s); S: area (m2); r: magma density (kg/m3)

Volcanological implications:

vent: rmixt3 ; w3;  S3

base of conduit: rmixt2 ; w2;  S2

top of magma reservoir: rmixt1 ; w1;  S1

rmixt3 . w3. S3 = rmixt2 . w2. S2  = rmixt1 . w1. S1