This wonderful laminated map from the Texas Water Development Board not only shows the major rivers of Texas and their basins, but also includes reserviors, major aquifers, major cities and counties .  An excellent resource for anyone wanting to understand Texas hydrology.

Click HERE for a detail view of this map.

Don't need the printed map?  Click HERE to download the PDF file FREE! (if it opens in an Adobe Reader (Acrobat) window, click the "Save a copy" icon or click File->Save a copy; Or, you can just right-click on the link and choose "Save target as..").