Abstract: The basic field data for time-of-travel measurements on six streams in Ohio are presented. In general, additional data on stream cross sections, tributary inflows, and chemical analyses for mainstream and tributary flows are given.

From introduction: This investigation deals specifically with the glacial-outwash aquifer in the Great Miami River basin of southwestern Ohio are documented by analyses of water from 98 sampling sites.

Abstract: A time-of-travel study was made on a 106-mile reach of the Tuscarawas River to determine average velocity and dispersion into five subreaches, and a fluorescent dye used as a tracer material. At about the 50-percent flow-duration level, time-of-travel of peak concentration was 137 hours.

From abstract: Water-quality reconnaissance by the U.S. Geological Survey and Ohio Environmental Protection Agency, to evaluate the status of Ohio's lakes and reservoirs was begun in 1975 with studies of 17 lakes. Spring and summer data collections for each lake included: profile measurements of temperature, dissolved oxygen, pH, and specific conductance; field and laboratory analyses of physical, biological, chemical (nutrient), and organic characteristics; concentrations of major and minor chemical constituents from composites of the water column; and physical and chemical data from major inflows.