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Figure 21. Relationship between the September- November. AMO vs. the Apr. - Sept. naturalized <br />stream flow for the Arkansas River at Pueblo Reservoir. <br />SEP -NOV AMO vs. Naturalized Flow (KAF) of Arkansas River from <br />Headwaters to Pueblo Reservoir (Apr -Sep) (KAF) <br />AAA& <br />Q <br />P <br />n <br />� a <br />LL <br />' <br />7 <br />i CIO <br />-0.50 -0.40 -0.30 -0.20 -0.10 0.00 0.10 0.20 0.30 0.40 0.50 0.60 <br />SEP -NOV AMO Value <br />F - Single Seasonal Runoff Timing <br />There is insufficient data to exam runoff timing for the Arkansas River as daily flow data <br />is not calculated by the State of Colorado or the U.S. Bureau of Reclamation, to the best <br />of our knowledge. Therefore this task for the Arkansas River basin was not performed. <br />G — Bi- seasonal HCI Relationships <br />October to March Precipitation: <br />Upper Arkansas: <br />In the far upper reaches of the Arkansas the PDO and the AMO were the most <br />notable factors that held some value in multi - seasonal wintertime precipitation. Negative <br />PDO years tend for wetter weather as does positive AMO values (note: that is opposite of <br />many of the basins described in this report.). <br />Middle Arkansas: <br />In the middle reach of the Upper Arkansas the PDO and the MEI were the most <br />notable factors that held some value in multi - seasonal wintertime precipitation. Negative <br />PDO years tend for wetter weather as does positive MEI values (i.e. La Nina leans <br />towards wet weather) <br />31 <br />