Yes but it didn't seem to be worth the trouble. For most of the winter I
can run flat out (like now). There are those month or so going into
summer and then again when the rains are just getting going in the fall
where I have to moderate useage.
I have what I call 'summer nozzles' which are smaller that reduce useage
during those times. For the most part I can set the nozzle size to match
the flow. And then maybe turn off the turbine at night and let it refill
when entering the dry season.
I've got several designes and ideas how to build an auto-shut off flapper
for the pond intake, so when it gets too low it stops the flow and lets
the pond refill and then re-opens, but since it's such a small part of
the year it hasn't seemed to be worth the trouble so far.
Consider the motorized blade valves used on RV waste lines as a possible
remote operated valve with good jam resistance.