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Colorado River Water Conservation District <br />Hydro - Climate Studies and Predictions <br />• Southern Oscillation Index (SOI) for similar periods as 1\IEI. <br />• Atlantic Multi- decadal Oscillation (AMO) for similar periods as MEI <br />Deliverables: <br />• Defined quantitative relationships between the NCI's and <br />basin average precipitation for Oct -Dec, Oct-Mar, Apr Jun <br />and Jul -Sep. This data will be provided in a 11\I1crosoft Excel <br />format. <br />• Defined quantitative relationships between the NCI's and <br />the basin volume Apr -Sept. runoff in these basins. This data <br />will be provided in a I\ficrosoft Excel format. <br />• Defined quantitative relationships between the NCI's and <br />the timing of runoff of the Apr -Sept. volumes in these <br />basins. This data will be provided in a 1\Iicrosoft Excel <br />format. The timing aspect is anticipated to be described on a <br />monthly basis. <br />• A written report outlining the results and a preliminary <br />`guideline' for usage. In addition a presentation of the <br />results, preferably to be presented at the June 2007 CWCB <br />board meeting. <br />CWCB will assist in procuring naturalized flows from some of these basins to be <br />coordinated with HDR. <br />Demand: Relate the average basin temperature and number of days with high <br />temperatures > 90F* (for select stations) for April to September, the monthly basin <br />precipitation values, and number of days per month with > 0.10" precipitation* for <br />(for select stations) in April to September within the basin to the following hydro - <br />climate indices. These relationships will be calculated for the Dolores -San Juan, Rio <br />Grande and Arkansas basins: <br />• Multivariate ENSO Index (1NIEI) for the periods of Jul /Sep through Oct /Dec <br />three -month averages and five -month averages <br />• Pacific Decadal Oscillation (PDO) for similar periods as MEI, <br />• North Atlantic Oscillation (NAO) for similar periods as MEI, <br />• Southern Oscillation Index (SOI) for similar periods as AIEI, <br />• Atlantic Multi- decadal Oscillation (AMO) for similar periods as MEI <br />Deliverables: <br />• Defined quantitative relationships between the NCI's and <br />the basin average monthly precipitation and monthly days <br />with > 0.10" precipitation (at select stations). This data will <br />be provided in a 1\ficrosoft Excel format. <br />• Defined quantitative relationships between the NCI's and <br />basin average monthly temperatures and number of days <br />with highs > 90F (at select stations). This data will be <br />provided in a NIicrosoft Excel format. <br />HDR Page 2 <br />