Abstract

Mono Basin is a closed hydrologic unit and is highly sensitive to anticipated changes in temperature and precipitation related to global warming. Available water in the basin is limited and intensely managed. Cottonwood Creek and Bridgeport Creek drain the northern non-Sierra portion of the Mono Basin, and while these watersheds contribute relatively little of the total runoff into Mono Lake, their hydroclimatic conditions are representative of the majority of the Mono Basin drainage area. The hydrologic balance for these watersheds is modeled and selected climate change scenarios are simulated to determine the magnitude of change in water surplus resulting from altered temperature of ±1° and ±2° C and precipitation changes of ±10% and ±20%. Changes in modeled water surplus expressed as a percentage of existing conditions range between 154% and 35% for Cottonwood Creek and 174% and 20% for Bridgeport Creek. Both watersheds display a greater response to a given change in precipitation than to a change in t...

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