Measuring Ground Water Movement With Radioactive and Chemical Tracers

Abstract

THE direct measurement of ground water movement is often of particular interest to those water supply engineers charged with the responsibility of protecting or developing a ground water basin. In many western states the underflow discharge of intermittent streams often represents a major portion of the water available from a watershed. The early tracer applications of Slichter (1, 2) to ground water velocity measurements, for instance, were largely concerned with such underflow studies in Southern California. Considerable interest