A decade of geomorphic and hydraulic response to the La Valle Dam Project, Baraboo River, Wisconsin

We investigate stream response to the La Valle Dam removal and channel reconstruction by estimat- ing channel hydraulic parameter values and changes in sedimentation within the reservoir. The designed channel reconstruction after the dam removal included placement of a riffle structure at the former dam site. Stream surveys undertaken in 1984 by Federal Emergency Management Agency and in 2001 by Doyle et al. were supple- mented with surveys in 2009 and 2011 to study the effects of the instream structure. We created a model in HEC- RAS IV and surface maps in Surfer© using the 1984, 2009, and 2011 surveys. The HEC-RAS IV model for 2009 channel conditions indicates that the riffle structure decreases upstream channel shear stress and [...]