A groundwater level survey and reconnaissance of the hydrologic conditions in the South Coast aquifer in the Santa Isabel area of southern Puerto Rico was conducted during March 31 to April 17, 2014. The field survey included groundwater level measurements at 55 wells and instantaneous streamflow measurements at 15 locations in streams and irrigation canals. A potentiometric surface map of the alluvial aquifer provides an indication of the directions of groundwater flow. The objective of the field survey was to delineate the potentiometric surface of the study area defined as the South Coast aquifer between the Río Descalabrado to the west and the Río Jueyes to the east of the town of Santa Isabel. Instantaneous streamflow measurements were made at selected sites along the Río Coamo, Río Descalabrado, Río Cañas, and the Canal de Juana Díaz to evaluate groundwater and surface-water interactions during the synoptic survey. Potentiometric contours are based on water-level measurements collected at wells during the dry season from March 31 to April 17, 2014. Measured values of the potentiometric surface ranged from -22.80 feet to 185.4 feet above mean sea level. The results of the study indicate a cone of depression in the aquifer near the center of the study area, where the potentiometric surface is below mean sea level.

These data contain groundwater level measurements at 55 locations, used in construction of the potentiometric map of the South Coast aquifer in the Santa Isabel area of southern Puerto Rico during March 31 to April 17, 2014. Measured values of the potentiometric surface ranged from -22.8 feet to 185.4 feet above mean sea level.

These data contain groundwater level measurements at 55 locations, used in construction of the potentiometric map of the South Coast aquifer in the Santa Isabel area of southern Puerto Rico during March 31 to April 17, 2014. Measured values of the potentiometric surface ranged from -22.8 feet to 185.4 feet above mean sea level.

These data contain the estimated locations of potentiometric contours of the South Coast aquifer in the Santa Isabel area of southern Puerto Rico during March 31 to April 17, 2014.

These data contain instantaneous streamflow measurements at 15 locations in streams and irrigation canals used in construction of the potentiometric map of the South Coast aquifer in the Santa Isabel area of southern Puerto Rico during March 31 to April 17, 2014.

This data set represents the extent of the South coast aquifer in Puerto Rico.

This data set represents the extent of the South coast aquifer in Puerto Rico.

These data contain locations of 11 irrigation ponds used in construction of the potentiometric map of the South Coast aquifer in the Santa Isabel area of southern Puerto Rico during March 31 to April 17, 2014.santa

The U.S. Geological Survey, in cooperation with the City of South Padre Island, Texas, collected base line hydrodynamic (tidal water level and current velocity) data for a near-shore area of the Laguna Madre near South Padre Island from August 18, 2021, to April 27, 2022. The data included in this data release are presented in a comma-separated values (csv) file format.

The U.S. Geological Survey, in cooperation with the City of South Padre Island, Texas, collected base line hydrodynamic (tidal water level and current velocity) data for a near-shore area of the Laguna Madre near South Padre Island from August 18, 2021, to April 27, 2022. The data included in this data release are presented in a comma-separated values (csv) file format.