G'day,
I've seen councils using bales of hay held in place with pickets
to slow and filter water in floodways.Seems to last for a while. If you have
a lot of bare and eroded ground you try sowing some lucern or wheat seed for
a quick cover.You will loose a lot to the birds at first but just resow over
a period of weeks and you will get a good cover. In the long run you will
need things like Lomandra reed to establish. It's tough as nails and handles
extremes of weather and both wet and dry conditions. Councils are using it
in roundabouts and such, where it seems to survive anything. If you look in
local creek beds it's starting to flower and will soon have heaps of seed
soon, which looks a bit like small rice grains in a orange to red fruit.
Otherwise any local native nursery should have tube stock available at about
$2 each.

China
Wingham
NSW