“…It is well known that artificial side channels generally aggrade (e.g., Formann, Habersack, & Schober, ; Riquier, Piégay, Lamouroux, & Vaudor, ; Simons et al, ; Van Denderen, Schielen, Westerhof, Quartel, & Hulscher, ). Within one river branch, side channels aggrade at various rates and with various types of sediment (Riquier, Piégay, & Michalkova, ; Riquier et al, ; Van Denderen et al, ). There is a need for a better understanding of the mechanisms and the processes that result in the aggradation of such side channels.…”