For
fractured aquifers, such as the Cretaceous Chalk, autocorrelation
in SGI (Bloomfield & Marchant, 2013) has been inferred
to be primarily
related to autocorrelation in the recharge time series, while in granular
aquifers, such as the Permo–
Triassic sandstones, autocorrelation in
SGI is inferred to be primarily a function of intrinsic
saturated flow and
storage properties of aquife