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Posted

NSIAP 
On 4/19, Lake Travis was 41.6% full at 457k acre-feet.
On 6/19, Lake Travis was 44.3% full at 486k acre-feet.
Today, Lake Travis is 89.2% full at 979k acre-feet.

Lake Travis has added 160 billion gallons of water in the past 30 days.  170 billion since April.

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Posted (edited)

In this article from 2024, an LCRA spokesman claims that wind and evaporation is roughly equal to the consumption in the city of Austin.  1" every 5-6 days.  That was when the lake was at around 42%, which would mean a surface area of around 10k acres. 

So, 10k acre-inches per 5 days -> 833 acre-feet per 5 days -> 5000 acre-feet per month or 60k acre-feet per year.  This is around 1629 million gallons per month lost by evaporation and the same consumed by the city of Austin.

This LCRA link shows that Austin uses 140k acre-feet, so perhaps the 1" number at 10k acres (from the original article) is inaccurate.

This PDF Link (cut-paste below) shows that City of Austin pulls 60k acre-feet per year from the highland lakes (confirms the original link) and another 100k acre-feet are pulled from Lake Austin and other rivers.

Cedar Park, Leander, and TC WCD are pulling about 37k acre-feet from the highland lakes.

Thanks for asking, as I would not have gone down this temporary rabbit hole :)

 

 image.thumb.png.b85c6602f35eee208c09522b4181836b.png

Edited by boilerhorn
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Posted
In this article from 2024, an LCRA spokesman claims that wind and evaporation is roughly equal to the consumption in the city of Austin.  1" every 5-6 days.  That was when the lake was at around 42%, which would mean a surface area of around 10k acres. 
So, 10k acre-inches per 5 days -> 833 acre-feet per 5 days -> 5000 acre-feet per month or 60k acre-feet per year.  This is around 1629 million gallons per month lost by evaporation and the same consumed by the city of Austin.
This LCRA link shows that Austin uses 140k acre-feet, so perhaps the 1" number at 10k acres (from the original article) is inaccurate.
This PDF Link (cut-paste below) shows that City of Austin pulls 60k acre-feet per year from the highland lakes (confirms the original link) and another 100k acre-feet are pulled from Lake Austin and other rivers.
Cedar Park, Leander, and TC WCD are pulling about 37k acre-feet from the highland lakes.
Thanks for asking, as I would not have gone down this temporary rabbit hole
 
 image.thumb.png.b85c6602f35eee208c09522b4181836b.png

Whatever lol

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