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Framing a new agreement to include specifi … Framing a new agreement to include specific water allocations to parties under a variety of scenarios can ensure resilience of an agreement through uncertain futures. One expert described a “new era” of the Colorado River in which the future hydrology “cannot be reasonably estimated by simply using the available gauge record.” Basin States “acknowledged the potential for impacts due to climate change and increased hydrologic variability” and collaborated on scenario planning in response. The 2007 Interim Guidelines defined specific deliveries to each Basin at stepped storage elevations of the reservoirs. Cognizant of the highly uncertain water supply in the Basin, the Guidelines defined allocations which addressed surplus, normal, and shortage conditions. The Guidelines included further protection from shortage by giving the Secretary of the Interior the authority to take additional necessary actions at critical elevations to avoid Lower Basin shortage as the conditions approach thresholds.age as the conditions approach thresholds. +
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