Response of Bed Sediments on the Grade‐Control Structure Management of a Small Piedmont Stream

• DOI: 10.1002/rra.3111
• Publication Date: 2016-11-22T03:26:57Z
• Authors: T. Galia; V. Škarpich
• Keywords: Riprap; Bedform; Sill

Abstract The grain sizes of 53 small lateral and mid‐channel deposits were evaluated on the 2.7 km long channel‐reach a headwater piedmont stream that has been affected by check‐dams bed sills constructions (ca. 14 per km), riprap bank stabilisations removal instream wood. Such interventions have led to loss natural vertically oscillating bedforms, pool‐riffles replaced plane beds. sediment divided based their positions relative grade‐control structures downstream, intermediate upstream types. individual types produced different downstream trends in reflected with respect (GCSs). generally slow coarsening, which may point increased efficiency energy dissipation GCSs under gradual decrease channel slopes. However, they not coarser than other two did indicate any notable grain‐size trend. Despite significant slopes related bankfull shear stresses at lack supply studied longitudinal profile, calibre produce systematic fining. Thus, observed most likely pointed selective scouring fine sediments, was caused presence effects decreasing connectivity. Copyright © 2016 John Wiley & Sons, Ltd.