The article presents the main results of substantiating the materials used when conducting experimental studies of channel processes in a river. the channel of which is composed of easily eroded soils. It is substantiated that the Amudarya sand cannot be modeled on a geometric scale since the model deposits are too small (powder) and lose the property of loose bodies. In such cases. https://thebrickes.shop/product-category/countertop-microwave/