Sparse Snowpack Worsens California Drought Crisis
March 6, 2014---"It
could be pretty grim," says California's chief of snow surveys, looking
toward the summer months. During one of the worst
droughts in
centuries, state officials are concerned. The snowy stockpile of water
in the Sierra Mountains is the state's real reservoir, supplying about a
third of the water used by farms and cities when it melts each spring
and early summer. National Geographic followed California’s top snow
surveyor on a recent snow inspection, and he's sounding the alarm.
Transcript
Frank Gehrke
Chief of Snow Surveys, California Dept. of Water Resources
“This is a pretty stunning example of how little snow we’ve had this season.
We’ve got a patch here and a few patches up in the trees, but in a normal year, we’re
at about 6,000 feet in the Sierra’s, mid-February, we should, first of all be on skis,
and not walking , and there should be 3-4 feet of now at this location.
We’re looking at basically, virtually a dry watershed at this point.”
“We depend upon the snow pack to act as a gigantic reservoir, that in ordinary
years, accumulates during the fall and winter and then gradually melts off in
the spring and summer, and replenishes the water that we’ve taken out of the
constructed reservoirs.
“The dilemma that we’re facing this year is with such a sparse snow pack and lack of
precipitation throughout the season already, our reservoir storage is already about
three-quarters of what it should be. “
Rich Preston
Park Superintendent
Folsom Lake State Recreation Area
“Normally we would be under water here. And the top of the lake would be at the
top of that point behind us.
“The lake is very important for not only providing water for the local communities
around, but it also provides habitat for the fisheries downstream and helps balance
the salinity in the San Joaquin Delta. “
Frank Gehrke
“The concept of an atmospheric river is where you have an Arctic or cold air mass
that entrains or brings moisture up from the tropics. And if you look on a satellite or
radar depiction, it’s as though there was a massive river directed at the West Coast.
And it can bring phenomenal amounts of precipitation in a very short period of
time.”
Mike Anderson
State Climatologist
California State Climate Office
“In November and December, 2012, we had a couple large atmospheric river events
and had us on to a strong start to the water year. With the new year of 2013, that
stopped. And we proceeded to have the driest calendar year in 120 years.”
Lynn Ingram
Professor, Earth and Planetary Science
University of California, Berkeley
“Climate is extremely variable. So we have prolonged drought over a decade or
several decades, and in some cases over a century. And it alternates with periods of
when it’s much wetter, and we have big floods. Because we see a recurring pattern
of droughts, over the last few thousand years, we can predict that they probably will
recur again, and we may even have entered one.”
Frank Gehrke
“The lack of snow pack as we move through the season, is going to create real
problems come the summer and the hot weather when we’re coming into this year
with a soil moisture deficit. And as we don’t accumulate, don’t replace that, then this
coming summer it could be pretty grim.”