The Highland Lakes Watershed could supply up to 21% less water during a severe drought than the Lower Colorado River Authority currently estimates, according to a new study released by the Central Texas Water Coalition that found less rainfall is reaching Lakes Travis and Buchanan despite relatively steady precipitation.
The background: Nine of the 10 years with the lowest amounts of water flowing into the Highland Lakes have occurred since 2006, while only three of the watershed's lowest rainfall years occurring in that same period, according to the study.
Although rainfall over the watershed has been steady for more than 100 years, the land is still sending less of each year's rain to Lake Buchanan and Lake Travis.