WMOD00274 (2) - Laserfiche WebLink

Home Browse Search

Yampa: A reasonable connection with the SOI and the AMO exists, however, it is less firm than the basins listed immediately above. To potentially improve any outlook would be to cross check the SOI and the Plateau Creek: For this basin, a very robust (relatively speaking) relationship exists with the ENSO (preferably the SOI) and the 2-year average for peak runoff in Plateau Creek. Some connection exists with the AMO as well and cross index connection might be examined to see if improved relationships exist. Table 12. Summary of Apr.-Sept. Multi (2-year) Naturalized Streamflow/HCI Relationships for the Colorado/Gunnison/Yampa-White basins (‘X’ indicates a relatively strong relationship and ’O’ indicates a relatively weak relationship). PDOMEISOINino 3.4 NAOAMO Upper Colo. O Middle Colo. O Eagle OO Roaring Fork OO Gunnison OO UncompaghreOO White Yampa Runoff Timing: An attempt was made to determine what impacts, if any did the HCI potentially have on the timing of the runoff in the basin. For the Colorado River basin, the analysis was confined to the timing of what is commonly called ‘Combined Reservoir Operations’. This operation is tied to the inflows on four main reservoirs, Green Mountain Reservoir on the Blue River branch of the Upper Colorado, Williams Fork Reservoir on the Fraser River branch of the Upper Colorado, Wolford Reservoir on the Muddy Creek branch of the Upper Colorado and Rudei Reservoir on the Roaring Fork River. The primary question was centered around whether there was any ‘predicability’ about the date which a combined 5000 cfs flows into these reservoirs. In summary, there was not a significant tie-in between the date of sustained 5000 cfs and the HCI values that could be reasonably used for planning purposes. It should be noted that the data sample points are limited to only 22 points. This is because of two factors 1) there are only 31 years which detailed naturalized flows are available in the basin available from the State (it should be noted that the State is working on expanding this dataset but, it is time-consuming). 40