Detrainment-limited gravity-current runout
= Detrainment-limited gravity-current runout
If a finite-volume <gravity current> loses or dilutes the scalar that supplies its <reduced gravity>, its front can approach a finite <runout length of a gravity current>. A box model couples the scalar balance to a <gravity-current front condition>; eliminating time then gives the front position directly as a function of the remaining scalar concentration.