Sound the Alarm!

The Barton Springs segment of the Edwards Aquifer has been declared in the Alarm Drought stage. According to the Chronicle:

"One of the drought indicators, Barton Springs, is flowing with 31 cubic feet of water per second, much less than the average 53 CFS, said BSEACD hydrogeologist Brian Hunt. Spring flows and levels in monitor wells briefly increased after rains in early May, but they have been steadily dropping since then. Currently, groundwater users, such as the cities of Buda and Kyle for example, are required to reduce usage by 20%. That could mean lawn-watering schedules or outright bans, said Hunt. Area sprawl development isn't necessarily to blame, he said, but likely exacerbates the situation. If dry conditions continue, the aquifer could reach critical stage by late summer, triggering 30% usage reductions and even lead to crackdowns on chronic water-wasters. The district is urging people to be water-wise at all times. Find more information at their Web site,http://www.bseacd.org/."

I find the timing of this announcement personally interesting based on a conversation I had with a co-worker this week. Their main point was "Who really cares if AMD puts their development within the recharge zone? It's not like that development can block recharging the entire aquifer!" Well, here's the reason why it matters. Recharge zones are typically geographically small areas where the water from the surface starts making it's way down to the aquifer. As this generalized cross-section shows, water, for the most part, doesn't make it's way down from the contributing or artesian zones. To further complicate things, different parts of the aquifer are replenished from different recharge zones (there are usually geologic features that direct water into one zone or the other). So while the Edwards aquifer may be getting recharged down in San Antonio, that usually doesn't do Barton Springs a whole lotta good.

So enter AMD and it's 850,000+ sq. ft development planted directly on top of the recharge zone. As this map shows, the recharge area for the Barton Springs area is relatively small (bisect Hays county and go north to where the aquifer zones stop and that is basically the Barton Springs Segment of the aquifer). So now add the huge AMD complex, the impermeable cover that is associated with it (roads, parking lots) and the infrastructure that will also be needed (water pipes, underground cabling, etc). The impermeable cover will collect particulate and chemical pollution from the cars/trucks riding/parking on it. When it rains, this pollution will be picked up and accelerated into the Barton Springs recharge zone and straight into Barton Springs pool (and don't tell me about the catchments they will be putting in place. No catchment can provide 100% filtration). So we will all get to swim in the eventual gasoline/oil/diesel/chemical mixture that along with low inflows/outflows to the aquifer, we'll see a rapidly degenerative effect on the quality of the water. And, I might mention, that's only if there is a Barton Springs pool left because of the reduction of water collection within the zone that the AMD and eventual future developments will provide.

So sound the alarm, I say! We need to make sure our elected officials know that Barton Springs has entered into drought stage. I hope that the rains will come this summer and replenish the stores but outside of a stray hurricane, I think we're in for another long, hot summer.