Tuesday, January 7, 2020

2019 Aquifer Status Review

No Drought
Lovelady well height: 495 ft-msl (158 ft-Depth to Water)
Barton Springs approximately: 46 cfs (10-day average)

FY 2019 began with a status of Stage II Alarm Drought declared by the Board on July 12th, 2018. An average of 13 inches of rain in September to October provided much needed recharge to the Edwards and Trinity aquifers. These rains revived aquifer water levels and Barton Springs flow, elevating to above Stage II Alarm drought warning levels. The Board subsequently updated the drought status from Stage II Alarm Drought to NO Drought on October 11th, 2018. The calendar year ended with some of the wettest December weather ever recorded. By New Year’s Eve, six inches of rain had fallen in Austin and the Hill Country for the month of December, more than two times the average. January 2019 provided about 3 additional inches, exceeding its historical average of 1.9 inches.
A combined 14 inches of spring rain fell in May and June 2019 providing even more recharge. Barton Springs flow quickly responded to the fall 2018 rains and additional spring 2019 rains to maintain an average daily spring flow of 100cfs throughout FY 2019. On June 14th, 2019, water level measurements in the Lovelady monitor well had risen to surpass the 3rd highest peak recorded in 2003 (536.0 ft-msl or 117.4 ft-dtw). 
Summer came with a drying trend. Below-average rainfall initiated a rapid decline at the Lovelady well beginning July 15th. This decrease has continued through a dry fall season and is projected through the winter.

To summarize, the Austin/Hill Country area has received an average 27 inches of rainfall in 2019, producing significant recharge for local aquifers. However, official forecasts point toward drier and milder-than-normal conditions across Central Texas, which will likely result in further declines as 2020 gets underway. We hope spring will bring its usual upward swing of recharge to keep our aquifers well-supplied. 


No comments: