Opinion: Four strategies for managing California’s crucial watershed
Conditions in the Sacramento-San Joaquin Delta and its watershed are changing as droughts become warmer and more intense. But as ourhighlights, California is not doing a good job of tracking these changes. That’s making it even tougher to manage the water that is available for the benefit of the state’s communities, economy and environment.
But temperatures are rising, as is evaporative demand, or the “thirst of the atmosphere.” This is drying out vegetation and soils, shrinking the snowpack — a key part of seasonal water storage — and reducing available runoff. Upstream use of river water also appears to be rising — possibly a result of thirstier soils and crops — further reducing the amount that reaches the delta.
Get better at tracking water use. In 2021, upstream and in-delta uses accounted for a staggering 100% of the runoff in the basin, leaving depleted reservoirs to meet all other needs. Yet the state lacks timely, precise information on these uses — information that’s essential to managing the water rights system and curtailing these users when supplies are too tight.
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