We got the tour of the North Appalachian Experimental watershed in Coshocton, Ohio last Monday. Watersheds are monitored for the complete hydrologic cycle. Below are pictures of the H-weir (blue) that measures surface runoff and the lysimeter that weighs and calculates the infiltration of water into the ground. We were lead beneath the ground via an old concrete stairwell to view the lysimeter.
The experimental watershed is broken into various plots of different landuse, % clay, slope, and other attributes. Below are clumps of no-till soil compared with tilled soil. The no-till soil has many long burrows from worms.
This is a plastic cast of one of the burrows made in the no till soil.
Because the water cycle and landuse are monitored, we will be able to determine much about the controls on the carbon cycle in response to landuse and other conditions.