As the stream flows it disturbs the stream-bed and becomes cloudy. If it is a calm stream, it picks up less sediment from the bed. If it is un-calm it collects a great deal of sediment and becomes thick with particles of kamma. If it is completely calm, it doesn’t pick up kamma but actually starts dropping sediment back onto the bed.
Eventually the stream becomes a river, or perhaps flows into a flood-plain or seperates into many smaller trickles. Whichever course it takes, it ceases to be. It is no longer a stream.
Now, if it was full of sediment, full of kamma, that kamma flows into the river. In this way, the kamma of the stream creates the quality of the river.
The stream is reborn as a river, or a flood-plain, or a trickle. nothing of the stream remains, but it’s kamma, it’s sediment, no resides in the river, in the flood-plain, or the trickle.
If there is a lot of sediment, the river is very cloudy. If less, it is clearer.
Now. If the stream is completely calm with no movement whatever, then all of the sediment, all of the kamma, has settled upon the bed. There is no flowing anymore. The flow has ceased. The cycle of samsara has been ceased. The stream now simply evaporates. The stream has escaped the confines of the channel.