| OCR Text |
Show Lake: An Initial Estimate of Nutrient Inflow," " Effects , of Animal Stockyards on the Pollution of Utah Valley Streams," and " The Summer Pattern of the pH of Utah Lake," ll+ 3 which were written by members of the Departments of Chemistry and Zoology at Brigham Young University. The Water Research Laboratory at Utah State University is in the process of completing the development of a hybrid computer model of the Upper Jordan River Basin under a contract with the Bureau of Reclamation ( Contract No. 1^- 06-^ 00- 53^, " Developing Hybrid Models for the Upper Jordan River Drainage"). The computer model will make possible the determination of various yields and outflows of the system under different operation criteria, and the water quality of Utah Lake as affected by various methods of satisfying demands. The effects of diking Utah Lake can be analyzed with this model. A more accurate estimate of the effects of the Bonneville Unit operation on the water quality and quantity in Utah Lake will be possible when the Brigham Young and Utah State University studies are complete. Considerable effort is also being expended by the State of Utah with assistance from EPA in the ongoing Jordan River- Utah Lake Water Quality Management study. The purpose of the study is to pinpoint all water pollution sources in the Jordan River and Utah Lake drainage basins and to establish a comprehensive plan to implement the recommendations determined by the study. The Bureau of Reclamation is providing basic data input to the study and a Bureau representative serves on the study advisory board. The study and plan are scheduled for completion in January of 19TI+. Importation of good quality Bonneville Unit water to the Sevier River would offer an excellent opportunity to dilute the dissolved salt concentration of the river water. Table C- 29 shows that the impact on the Sevier River would be a substantial improvement to water quality at Sevier Bridge Reservoir. The increase in the dissolved solids concentration of Duchesne River during periods of spring runoff in May and June would have an insignificant effect upon the quality of Green River water since the Green River would be at peak flow at that time. The Bureau of Reclamation's estimate of the Unit impact on water of the Colorado River would be an increase of the average concentration of dissolved solids below Hoover Dam by about 10 mg/ 1, as compared to ik mg/ 1 estimated by the Environmental Protection Agency. This increase would compare with a present average salinity in the Colorado River below Hoover Dam of 7^ 5 mg/ 1. The reason the above two increases vary is that EPA based their estimate on unadjusted historical flow in the river. As explained in the 398 |
