Partial abstract: "This report reviews the scope of a research effort initiated in 1974 at the U.S. Army Engineer Waterways Experiment Station with the objectives of (a) assessing the state of the art in geophysical cavity detection and delineation methodology and (b) developing new methods and improving or adapting old methods for application to cavity detection and delineation." This report discusses the geography, topography, site drilling tests, magnetic and microgravimetric surveys, and other information about the Medfor Cave site in Florida.

Abstract: The Pinellas County landfill site is on a flat, coastal area characterized by a nearsurface water table. Part of the site is subject to tidal flooding; altitudes within the study area range from 8 to 12 feet above sea level. Three geohydrologic units underlie the landfill site. In descending order, these are: a surficial aquifer about 19 feet thick composed of sand and shell, a confining bed about 35 feet thick composed of marl and clay, and the Floridan aquifer composed of limestone. Landfill operations have not altered surface-water quality. Although leachate movement downward into the Floridan _aquifer is not indicated, vertical movement through the confining bed is about 0.005 foot per year. The rate of lateral movement of ground-water away from the site is about 1.2 feet per year; . however, the rate of movement along the boundary from the oldest section of the landfill through the surficial aquifer is about 20 feet per year. Peaks in concentration of selected chemical parameters and flow-rate analysis of water from trenches indicate the possibility of intermittent release of leachate from the landfill.

From introduction: The purpose of this report is (1) to describe the geology, hydrology, and quality of water of Manatee County and (2) to evaluate the availability of surface and ground water for development. The report provides Manatee County, the Southwest Florida Water Management District, and the Florida Department of Natural Resources with a data base and an evaluation of the water resources of the area so that water-quality and water-resource problems and water-management and regulatory needs can be adequately defined and documented.

From introduction: The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers, conducted a 1-year study to determine the effects of proposed deepening of the navigation channel on the surficial aquifer. A specific objective was to determine the degree of interconnection that exists current between the limestone adjacent to the river and the limestone in the riverbed that is to be dredged.

Map showing biological resources (birds, habitats, reefs, fishes, etc.) in the Arcadia region of the Florida coastline. Scale 1:100,000.

Map showing various hydrologic and climatologic aspects (rainfall, measurement stations, hurricane inundation zones, etc.) in the Arcadia region of the Florida coastline. Scale 1:100,000.

Map showing mineral resources (oil, gas, sand, clay, etc.) in the Arcadia region of the Florida coastline. Scale 1:100,000.

Map showing various sites and features (recreation sites, land use, landfills, historic sites, transportation, etc.) in the Arcadia region of the Florida coastline. Scale 1:100,000.

Map showing various kinds of soils and landforms in the Arcadia region of the Florida coastline. Scale 1:100,000.

Map showing various hydrologic and climatologic aspects (rainfall, measurement stations, hurricane inundation zones, etc.) in the Cape Sable region of the Florida coastline. Scale 1:100,000.

Map showing mineral resources (oil, gas, sand, clay, etc.) in the Cape Sable region of the Florida coastline. Scale 1:100,000.

Map showing various sites and features (recreation sites, land use, landfills, historic sites, transportation, etc.) in the Cape Sable region of the Florida coastline. Scale 1:100,000.

Map showing various kinds of soils and landforms in the Cape Sable region of the Florida coastline. Scale 1:100,000.

Map showing biological resources (birds, habitats, reefs, fishes, etc.) in the Charlotte Harbor region of the Florida coastline. Scale 1:100,000.

Map showing various hydrologic and climatologic aspects (rainfall, measurement stations, hurricane inundation zones, etc.) in the Charlotte Harbor region of the Florida coastline. Scale 1:100,000.

Map showing mineral resources (oil, gas, sand, clay, etc.) in the Charlotte Harbor region of the Florida coastline. Scale 1:100,000.

Map showing various sites and features (recreation sites, land use, landfills, historic sites, transportation, etc.) in the Charlotte Harbor region of the Florida coastline. Scale 1:100,000.

Map showing various kinds of soils and landforms in the Charlotte Harbor region of the Florida coastline. Scale 1:100,000.

From purpose and scope: The U.S. Geological Survey, in cooperation with Lee County, conducted an investigation of the river in 1976-79. This investigation was planned to provide a broader base if information than heretofore available on the freshwater resources of the Caloosahatchee River basin, and in particular to provide information on water-quality conditions with emphasis on nutrients and algal growth. In addition to data collected during 1976-79, some earlier data collected by the U.S. Geological Survey were included to evaluate annual variation and trends.

This report presents survey results designed to find chloride concentrations in the Floridan aquifer, the main source of freshwater for southwest Florida. It contains maps, graphs, and tables.

From introduction: The study is part of a continuing cooperative program with the Southwest Florida Water Management District to define and describe characteristics of the aquifer. Aquifer characteristics determined from the study will provide data necessary for regulatory agencies to more efficiently manage water supply and development. The study area includes 10 counties and parts of 6 other counties within the District.

"Duval County in northeastern Florida and adjacent to the Atlantic Ocean contains approximately 840 square miles of which approximately 80 square miles are covered by water. The county is drained by three major rivers, the St. Johns, Nassau, and St. Marys. In addition, the coastal areas are drained by numerous small streams that empty into the Intracoastal Waterway or the Atlantic Ocean."

Map showing biological resources (birds, habitats, reefs, fishes, etc.) in the Dry Tortugas region of the Florida coastline. Scale 1:100,000.

Map showing various hydrologic and climatologic aspects (rainfall, measurement stations, hurricane inundation zones, etc.) in the Dry Tortugas region of the Florida coastline. Scale 1:100,000.