Hydrologic data in Bear Creek Basin and western Jackson County, Oregon, 1976-77

To determine irrigation return flow impacts on Meyer Creek and Griffin Creek, 12 sites were sampled prior to and during the irrigation season. Thirty-three sets of samples, consisting of irrigation inflow and outflow samples on farms, were collected to determine if the use of irrigation water was improving or degrading the water quality. One hundred fifty visits were made to tributaries and Bear Creek to collect and analyze samples to help isolate the source of water-quality problems. Three diel studies were made on six main-stem Bear Creek sites, two during and one after the irrigation season, to help identify main-stem water-quality problems. Rainfall and runoff data from five small basins as well as water-quality data from four of the basins were collected during storm events.