Water survey helicopters scheduled to fly over the Central Coast
You may see low-flying helicopters over the Central Coast. Do not be alarmed, the California Department of Water Resources will be using helicopters to do a survey of groundwater basins. They will be doing electromagnetic surveys to support drought response. During the surveys, a low-flying helicopter tows a large hoop with scientific equipment approximately 100 feet above the ground. The schedule and map of where the surveys can be found here. … Survey data creates an image of the subsurface down to a depth of about 1,000 feet below the ground surface and provides information about large-scale aquifer structures and geology.