No, I skimmed it and moved on to the original calculations on
groundwater recharge rates. I am not a hydrologist, but I found the
stuff interesting. From my browser history:
<
https://ca.water.usgs.gov/data/drought/groundwater.html>
<
https://earthzine.org/2016/02/23/recharging-californias-diminishing-aquifers/>
<
http://www.wcc.nrcs.usda.gov/ftpref/wntsc/H&H/NEHhydrology/ch10.pdf>
I tried to estimate how many inches of rain, over some percentage of
the state, it would take to produce 11 trillion gallons (33,700,00
acre-ft) of groundwater recharge, and gave up as I was making far too
many assumptions and bad guesses.
>And what is the conclusions of California? I think they are totally
>false. Why? Because the recharge rates they are quoting are STEADY
>STATE. This means that if farmers were to draw water ONLY from
>the aquifers as they did in the drought period it would require
>some 3 years of NORMAL rain to recharge.
>
>But since water is much cheaper from water services using full
>reservoirs this is not a proper view.
So, you expect farmers to dump all the water conservation equipment
and procedures and return to the bad old days of over-irrigating and
water loss by evaporation? It's possible, but probably unlikely. The
state will not slack off on water use controls until the dry well
tests show an increase in water table levels and a reduction in salt
water incursion. That will take several years.
>The NASA paper makes the rather surprising statement that California's
>aquifers hold no more water than 1 1/2 times the total water held
>in California's largest reservoir. And that amount has so far
>been exceeded several times over.
What page? I couldn't find that statement.
California's largest reservoir is Lake Shasta.
<
https://en.wikipedia.org/wiki/List_of_largest_reservoirs_of_California>
which holds 4,552,000 acre-ft or 5.6 km^3. I'm not sure if the
underground aquifer includes those that were recently discovered.
"Large Aquifers Discovered Under California's Drought-Stricken Central
Valley"
<
https://weather.com/science/environment/news/california-aquifers-discovered>
"Stanford researchers show that there are about 2,700 cubic
kilometers of accessible fresh or brackish water locked in
the Central Valley’s deep underground aquifers. That’s
almost triple the 1,020 cubic kilometers of freshwater that
had been previously estimated."
That would be 482 times the largest reservoir discovered, and 182
times the pre-discovery aquifer estimate. Something is obviously
wrong here.