2012-2013 Well Readings

This historical data table for 2012 includes all available daily high water levels for well J-27. In February 2012, repairs were made to J-27 that resulted in the well being connected only to the Edwards Aquifer instead of a combination of aquifers. After the repairs were made to J-27, it was noted that adjacent pumping wells cause interference with the J-27 water level measurements when those adjacent wells are operating. As a result of the interference (water level draw-down), measurements from J-27 are artificially low when the adjacent wells are operating. If the adjacent wells are not turned off for at least one hour during a 24-hour period, representative water levels from J-27 are not available for that day. On this table, daily high values that are noticeably lower relative to the previous day are due to interference (water level draw-down) from the adjacent wells.

This graph indicates 2012 actual daily high water level measurements from a nearby (1.7 miles northeast) Edwards Aquifer monitoring well that are used to calculate the imputed J-27 daily high water level. This calculation is used to estimate the J-27 water level when actual J-27 measurements are not representative do to interference (water level draw-down) from adjacent pumping wells.

It is important to note that these imputed values are only used to construct comprehensive historic data tables. Imputed water level data are not used to trigger Edwards Aquifer Critical Period (drought) restrictions for Uvalde County. Well J-27 is the official Edwards Aquifer monitoring well for Uvalde County and actual J-27 readings, with the adjacent wells turned off, are used when area water levels are near Critical Period trigger values.

Click for larger image.