In the summer of 2015, Lina was at the Engineering Research Center at Colorado State University, Colorodo, USA, conducting a flume experiment to model semi-alluvial streams. A flume is a small model of a stream that can be used to conduct experiments on streams to see what happens if we change the slope, the water flows, or sediment size. A flume is also beneficial when we want to see how a channel forms over a long period of time. Lina modeled a typical semi-alluvial stream in northern Sweden with large boulders, cobbles, and gravel and relatively low slopes (2 & 5%) for such coarse sediment.
Looking upstream at bankfull flow
Bird’s eye view of the flume with low flows. Note the coarse sediment, representing boulders and cobbles