California surpassed its all-time snowpack record: California's statewide Sierra Nevada snowpack on April 3 tied with 1952 for the highest on record, reaching 237% of average. Our live data tracker, updated daily, shows where California stands on water:
in the Sierra Nevada and other northern mountain ranges. To satisfy human demands, we have transformed the state’s natural water systems to transport water hundreds of miles from its source.The federal government built the Central Valley Project, which primarily conveys water from Northern California to irrigate crops in the San Joaquin Valley., which snakes down the Central Valley for more than 400 miles. Much of the water in the state aqueduct moves downhill by gravity.
Prolonged drought conditions make it more difficult for rain to seep into the ground, as the ground tends to be harder and not as porous as it would be with more moisture.When rain falls as snow, it freezes and creates a water reserve for warmer times of the year. This water, when it melts, washes back into waterways and into the ground, supporting our water needs when rain isn't in the forecast.
Historically most snow has fallen by April 1, so scientists compare the snow water content from that day to the same day in previous years to access how likely the state will be to satisfy water requests. Like all water data in California, these measurements are very spiky and hard to understand. But we can compare each stream to its past measurements.The State Water Project doles it out based on a system dating back to the Gold Rush.
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