Current Lake and River Conditions

Guadalupe River @ Spring Branch

  • Streamflow: 80.3 cfs
  • Gage height: 2.27 ft
USGS

Guadalupe River @ Sattler

  • Streamflow: 78.4 cfs
  • Gage height: 4.33 ft
USGS

Guadalupe River @ New Braunfels

  • Streamflow: 124 cfs
  • Gage height: 1.83 ft
USGS

Streamflow is measured in cubic feet per second (ft³/s or cfs). A measurement used to describe the flow rate of water in rivers, streams, and other waterways. It represents the volume of water that passes a specific point in the river each second.

Imagine a river as a pipe. If you were to slice a tiny piece of that pipe perpendicular to the flow and measure the amount of water passing through that slice in one second, you’d get the flow rate in cubic feet per second.

For example, if a river has a flow rate of 100 cubic feet per second (or ft³/s), it means that 100 cubic feet of water pass a particular point in the river every second. A basketball is a great example of an object that is one cubic foot. So in this same example, imagine 100 basketballs passing a specific point in one second. This measurement is crucial for understanding the behavior and characteristics of rivers, especially for activities like water supply management, flood forecasting, and recreational activities like kayaking or rafting.

Canyon Lake – 886.37ft

Lake levels in Texas are typically measured relative to a reference point known as “sea level.” Sea level is a standard measurement used worldwide as a reference point for elevations and depths. In Texas, the elevation of a lake’s surface is often measured in feet above or below sea level.

To measure the elevation of a lake’s surface relative to sea level, surveyors use specialized equipment like GPS receivers or leveling instruments to determine the lake’s elevation at a specific point. This measurement is then compared to the elevation of sea level, which is a constant value determined by global measurements.

For example, if a lake in Texas has an elevation of 500 feet above sea level, it means that the surface of the lake is 500 feet higher than the average level of the world’s oceans. And if a month later the same lake had a measurement of 505 feet, that means the level of the lake went up 5 feet in that time.

Measuring lake levels relative to sea level is important for various reasons, such as assessing flood risk, managing water resources, and understanding the impact of changes in precipitation and evaporation on lake levels over time.