| OCR Text |
Show Maximum and minimum daily flow - Average flow for a 30- day period that was selected from the 41- year period of record which would resemble the maximum or minimum flow for a 30- day period in the future. Because maximum and minimum instantaneous flows cannot be precisely predicted, these short- period averages give the best indication of the magnitude of flows to be expected. Average Daily flow - The average flow of the entire period of record for the month as indicated in the table. For the purposes of convenient discussion, average figures have been used in the text. However, to obtain a complete view of expected flow conditions, maximum and minimum flows should also be studied. Intercepting the high flows of the spring runoff would decrease the rate of bank cutting and meandering of the streams below the diversion structures. In turn, this would result in a reduction of the silt load carried to the lower Duchesne River and the Green River. Despite the collection of a great deal of hydrological data, it is not possible to accurately and precisely predict the exact amounts of water that would be available immediately downstream from Unit structures. The only way to obtain completely accurate data is to assess the situation after construction. It is planned to monitor operation at each diversion and where possible reduce the adverse effects on fisheries through reasonable and controlled regulation of flow. At present, Water Hollow Diversion Dam is in operation but is not being studied. However, only about 50 percent of the available water is being diverted until an evaluation can be made. An evaluation would also be accomplished below Soldier Creek Dam prior to initiation of the proposed storage schedule. In years of short water supply, irrigation shortages in Bonneville and Uinta Basins would be shared, equally resulting in reduced diversions into Strawberry Aqueduct. During drought periods, natural flows would tend to prevail and most of the flow would be bypassed to the streams along the Aqueduct. ( a) Duchesne River There are no direct Unit diversions from the river until Knight Diversion Dam which is located 42 miles 297 |
