Abstract: Apparatus for modeling the sediment transport characteristics of a selected ection of a river or the like includes an elevated inclined platform adapted to receive an insert representing a scaled model of the section of river to be studied and a water source for delivering water containing a simulated sediment to the model. As the water flows over the model, the sediment is transported so as to simulate the sedimentary characteristics of the modeled portion of the river. The apparatus is provided with a function generator which allows the water to be delivered to the model in accordance with a specified hydrograph and is also provided with a sliding digital micrometer survey system which allows accurate surveys to be taken at selected increments along the model. Method for modeling the sediment transport characteristics of a river is also described.