Thermal image of stream and bank with concrete structure

Detailed Description
Thermal image of Little Lehigh Creek (blue, cool), stream bank (yellow, warm), and concrete intake structure (white, hot) for Li'l-Le-Hi Trout Nursery, Allentown, Pennsylvania. Areas of cooler water in the stream may indicate locations of groundwater inflow. (Jeffrey Cole, USGS; Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government)
Sources/Usage
Public Domain.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government