8/8/2023 0 Comments Customs find hidden waterPage has worked in the region for many years and collects data about geologic formations and faults to determine how they affect surface water and groundwater flow.Ī three-dimensional (3D) geologic model developed by the USGS was one of several techniques used to understand how water flows in the Santa Cruz Basin. After Nelson had explained his dilemma, Page shared results of his studies in the area. Nelson then collaborated with geologist William Page of the U.S. “Although that was reassuring,” said Nelson, “I was reluctant to consider the findings more than preliminary until I could get field data on whether the rocks in the area would actually let water through to lower levels.” The model produced results closer to the actual conditions. He used a water simulation program and entered data that included the possibility of aquifers deeper than 150 feet beneath the surface. Keith Nelson, a hydrologist at the Arizona Department of Water Resources (ADWR) in Phoenix, worked to find the answer. The aquifers that provide much of the groundwater to the city of Nogales and the surrounding communities are collectively called “the microbasins.” The microbasins are narrow, and scientists originally thought they were shallow-100–150 feet below the surface-because solid bedrock is close to the surface and water cannot pass through it easily.Ĭould water be leaking beneath the shallow aquifers, making more water available? Groundwater in aquifers can be brought to the surface by natural springs or wells. During the rainy season in southern Arizona, water seeps into the ground and is stored in big, underground bathtubs called aquifers.
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