U.S. Geological Survey researchers said photos show erosion is occurring as water releases from Glen
Canyon Dam vary to meet peak power demands and interstate water-sharing agreements, the Arizona Daily Sun reported Wednesday.
Sand in the Colorado River is believed to be linked to the creation of backwaters that could help
promote the survival of some fish species, the newspaper said. Boaters use beaches for camping. Grand
Canyon Superintendent Steve Martin has proposed more regular floods to improve the canyon's ecosystem