The Guadalupe River runs from Kerr County, Texas to San Antonio Bay on the Gulf of Mexico. The river is a popular destination for rafters and canoers. Larger cities along the river include New Braunfels, Kerrville, Seguin, Gonzales, Cuero, and Victoria. The Guadalupe has several dams along its length, the most notable of which forms Canyon Lake northwest of New Braunfels.
We drove down from Austin towards New Braunfels, on a Sunday with 10 cans of beer. Now in the good old state of texas they don’t sell alcohol on Sundays before noon, as most of the texans are still in church and it doesn’t make sense to sell beer before they come out. So we had to wait till all the Texans came out of the church and we could buy 24 more cans to take with us while we floated down the river. That made for about 10 cans for each of us. The place was swarming with people, with roughly ten cans per person who were placing themselves and their ice boxes in tubes, and floating on down the river.
During the course of a 5 hour float, each individual consumes on average five liters of beer. The average number of people in the river that day was 17,000. Doing the math, a total of 85,000 liters of beer was consumed. Assuming 15% body retention, that translates into 72,250 liters of beer that flowed in the river.
The flow of the river was 550 cfm for the day. Which means 33,000 cubic feet of “fluid” flowing through it per hour. Converting it into liters per hour, 934,456 liters per hour. 72,250 liters of that was… Beer…well technically its not exactly beer, having gone through the process of digestion, conversion, and urination, but it sure runs through fast….