Some suggestions of experiments that might throw light on the use of non-local treatments in landscape models Vaughan R. Voller, University of Minnesota Due in a significantly large part to previous STRESS meetings there is a keen current interest in modeling landscapes that use non-local treatments to account for transport. Whereas such models have been very successful in explaining observed landscape forms in both erosional and depositional environments there are still some critical open questions. Two questions of particular interest: How can the parameters that determine the extent and direction of non-locality be associated with measurable attributes of the landscape? How can non-local effects be untangled and distinguished from non-linear effects? In this presentation we will report on recent activity in our group to identify simple experimental systems, which in conjunction with simple “toy” models might provide (i) clear evidence of the presence of non-locality in landscapes and (ii) information on how such nonlocality can be quantified.