  We study the effect of noise on the transport of a quantum state from a
closed loop of $n-$sites with one of the sites as a sink. Using a discrete-time
quantum walk dynamics, we demonstrate that the transport efficiency can be
enhanced with noise when the number of sites in the loop is small and reduced
when the number of sites in the loop grows. By using the concept of measurement
induced disturbance we identify the regimes in which genuine quantum effects
are responsible for the enhanced transport.
