Assertion: delta's channel | /r/HasProperty | figure
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text: Over timescales much longer than the avulsion period, an “active channel set” emerged, consisting of 4 to 5 channels that were periodically revisited by flow (Figures 3a and 4c), providing the first experimental confirmation of numerical predictions [Jerolmack and Paola , 2007]. Statistics of channel migration were demonstrably nonrandom (Figure S4) and showed a strong tendency for flow to reoccupy abandoned channels (Figures 3 and 4).