This may affect GC flows on the weekends through August. Here's the summary:
...low, steady flows of water from Glen Canyon Dam over the weekend gives the eggs that bugs lay on rocks, wood or cattails just below the water’s surface a better chance of survival. Otherwise, they might dry out and die within an hour.
“It’s a powerful reminder that flows really matter, that just a couple days a week of steady flow can illicit massive emergence,” said Kennedy, a research ecologist with the U.S. Geological Survey.
Full article here:
Changes were made to water flow out of the Glen Canyon Dam. And that led to more bugs in the Colorado River.
It's good to know they're looking after the bottom of the food chain in the Grand Canyon.
I strongly support helping the ecosystem down there, however, it's worth pointing out there's nothing remotely natural about a low flow (or clear, cold water) down there at this time of year. Late in the summer and through the rest of the year would be more appropriate for this experiment. The fact they're using low flows for bugs during what was once the peak of spring runoff indicates that the managing agencies have given up trying to mimic the natural system. Without Glen Canyon Dam the flow today (6/5/19) would be a muddy 30,000 cfs and rising steadily to about 60,000+ over the next month. The flow may even top 90,000 cfs this year with the snowpack we have.