Water from the Colorado River reached the sea for the first time in decades this spring, the result of an experimental release of water into the river’s long dried-up delta. Now scientists are evaluating the effect of that flood, and trying to nurse parts of the delta back to life.Water from the Colorado River reached the sea for the first time in decades this spring, the result of an experimental release of water into the river’s long dried-up delta. Now scientists are evaluating the effect of that flood, and trying to nurse parts of the delta back to life.