A series of seven studies of the quality and quantity of low flows in a 35.5-mile reach of the Colorado River upstream from Colorado City, TX, were made from February 1975 to March 1978 to delineate areas of saline inflow. Salt-load trend studies for three long-term continuous streamflow and daily water-quality stations show that the salinity of the flow upstream from Ira (mile 826.3) increased significantly after 1963, but decreased significantly after 1970. The low-flow and salt-load trend studies indicate that part of the salinity in the flow of the Colorado River has resulted from the inflow of oil-field brine; but preponderant evidence indicates that the major part of the salinity is of natural origin. Neither the ban on open-pit disposal nor pumping of saline ground water has significantly reduced the salinity of flow downstream from Cuthbert (mile 810.6). (USGS).
Additional publication details
USGS Numbered Series
Source areas of salinity and trends of salt loads in streamflow in the upper Colorado River, Texas