where Q is aquifer storage, m2; t is
time, d.
(3) The duration of the graph of Q is defined as residence time
(RT , d) (Siergieiev et al., 2015).
(4) The ratio of return time to infiltration time
(t R/t F) is defined
according to the graph of Q . (t F, d)
refers to the time required for Q to rise from zero to its
maximum, while (t R, d) refers to the time
required for Q to decrease from its maximum to zero (Siergieiev
et al., 2015).