They have been spraying the hyacinth, the roots are dying and the plants are breaking off and floating south. Plus the aquaduct pumps are near capacity for the fires down south creating more current drawing crap off the banks and down the channels.
They had to spray early this year from an increased infestation related to heat and increased nutrients from the large amount of water from the mountains. Most of the clumps of weeds have some sort of debris trapped in them as well, as my prop found out last week.