Sediment entrainment in river ice

I know many of you are asking “Does the river ice play any role in the sedimentary processes on the Yukon River?”. And I have to answer “duh!”.  Here are some pictures I took earlier in the year shortly after the freeze up.  Before the river was completely covered with ice there were enormous chunks floating around.   These pictures show a huge slab of ice with the soil that was underneath it frozen to it.  I estimate that in this slab there is about half of a cubic yard of sediment.  In the spring when the river ice breaks up it will flow out to the sea and drop the sediment as it melts adding to the Yukon delta.  Multiply the soil on this slab by a few ten thousand and you a significant depositional event.