Department of Water Resources

Ezra David Romero / Valley Public Radio

A new map released by NASA earlier this year shows that large portions of California are sinking. The worst of it is in the San Joaquin Valley. One of the main reasons is the over pumping of groundwater, especially in the last five years of drought.

All that sinking and all the snow melting in the Sierra has Central Valley water managers like Dustin Fuller worried.

Andrew Nixon / Capital Public Radio

After five years of drought there’s so much snow in the Sierra Nevada that state water officials are preparing for a massive runoff year. But the traditional way of calculating the snowpack has a huge margin of error and as Valley Public Radio’s Ezra David Romero reports a new way to measure it could greatly decrease that inconsistency.  

Every winter and spring a network of snow surveyors manually tally how much snow is in the Sierra Nevada. They do this by measuring snow depth in the same spots every year.