Comparative Study of Ground-Water Quality, 1976 and 1996, and Initial Gain-and-Loss Assessment of Boulder Creek, Boulder County, Colorado

摘要

This report presents the water-quality data collected during 1975-77 and 1996 andthe statistically significant differences between the data sets where appropriate. This report also lists the results of analyses for anthropogenic constituents that were not measured during the 1975-77 study. Additionally, this report presents the measured data and calculated results of a streamflow gain-and-loss study in Boulder Creek through the urban corridor of the City of Boulder on October 24, 1996. This part of the study indicates stream segments that were gaining or losing flow volume through a hydrologic connection with the adjacent ground-water system. The gain-and-loss study was undertaken to demonstrate the value of this tool for quantifying ground-water/surface-water interactions.