Thursday, July 17, 2014

AQUIFER? WHAT'S AN AQUIFER?

A pit-a-pat upon the shingles.  A gray haze seeping around the edges of the curtains.  A whispered scent of dampness.  Uncommon stillness.

Rainy mornings.  I miss them.  I miss snuggling deeper under the blankets and allowing the thunder of drops to lull me back to sleep for another minute or another hour.  I miss the refreshing coolness that comes in its wake.  I miss the smell of nature washed clean.

Unlike rain in the Midwest, rain showers in San Antonio are sparse, but when they come, they come in torrents.  They pummel the sun-baked earth for a minute or two and disappear.  The ground barely responds to the slaughter, unable to soak in the sudden onslaught, and so, the rain runs away, into the streets, pooling in spots of least resistance.  There are few storm sewers.  There’s so little rain, it’s not worth the infrastructure investment.  After a particularly strong storm, the water will stand in the streets, until it evaporates or finds a way to escape.  The standing water is dangerous to cars and people.  Residents tend to wait for the water to subside, rather than fight it.



Water is a precious commodity in south Texas.  Faucets and toilets have, by law, low-flow valves to lessen waste.  Water bills are high.  Local ordinances restrict water usage.  We are allowed to sprinkle our lawn once a week, either in the early morning or late at night.  Our day is assigned by the San Antonio Water System (SAWS).

The only exception to the rule is new sod.  When our home’s builder put in the lawn, we were allowed three weeks of daily watering to establish the lawn.  As we didn’t know exactly which day our lawn went in, I counted the three weeks from our move-in date.  SAWS didn’t like that.  The water “police,” in white uniform, showed up at our door, informing us that we could no longer water daily.  How did they know??  What sort of monitoring does this Big Brother organization have in place?  Our water bill for that one month was almost $300.

The weekly watering allowance can be taken away, depending on the aquifer level. 

Aquifer.  I had no idea what that was when I moved to San Antonio.  People bandied the word about as normal and routine.  I nodded pathetically without understanding, until I did my own research.  An aquifer is an underground geologic formation that can store and transfer groundwater.  San Antonio sits on the Edwards Aquifer, which is a karst aquifer.  It is made of porous and permeable rock that has been dissolved over time and stores water in fractures, conduits, and cavities. 

Instead of some muddy river or freshwater spring, San Antonio gets its water from this underground table.  The level is constantly tracked and SAWS imposes rules about usage based on the level.

The rules are necessary, I guess, when rain is rare.  Rain capitulates to days and days of brilliant sunshine.  When I first moved to San Antonio, a former Air Force officer told me that the city averages 350 days of sunshine per year.  That’s why there are three Air Force bases in and around San Antonio; pilots can fly nearly every day of the year.

I’ve been forced into a trade-off – curling up with the latest bestseller on a dark, rain-streaked afternoon or by the pool with margarita in hand.  Hmmmm.  It’s a swap worth making.




(As I was writing this, Mother Nature decided to thumb her nose at me and let loose with an uncharacteristic downpour in the middle of the afternoon.  Just when I thought no one was paying any attention…)

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