Middle Guadalupe

Watershed Hydrology

The Middle Guadalupe Watershed (HUC 12100202) encompasses approximately 1,682 square miles in central Texas. The hydrology of the watershed is characterized by a mix of perennial and intermittent streams, with the Guadalupe River being the primary channel. The area receives an average of 33 inches of precipitation annually, with about 17% of that falling as snowpack. Surface water in the watershed is primarily used for irrigation and recreation, with several reservoirs including Canyon Lake and Lake Dunlap. Water quality in these reservoirs is monitored for constituents including nutrients, bacteria, and dissolved oxygen. Interesting climatic facts include the fact that the Middle Guadalupe Watershed is located in a region that experiences a significant number of flash floods, with heavy rainfall events causing significant damage to infrastructure and property. Additionally, the area has experienced a warming trend over the past century, with an increase in average temperature of about 1.5 degrees Fahrenheit since 1900.


Surface Flows

Middle Guadalupe Watershed

Snowpack Depths

Middle Guadalupe Watershed

Dams & Reservoirs

Middle Guadalupe Watershed

Groundwater Levels

Middle Guadalupe Watershed

Middle Guadalupe Rivers

Rivers of the Watershed