ARCHIVED CONTENT: In December 2020, the CZO program was succeeded by the Critical Zone Collaborative Network (CZ Net) ×

Calhoun Experimental Forest and Eco-hydrology Experiments

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Three historic Calhoun experimental catchments are being re- and up-instrumented based on precipitation and runoff gauging from the 1940s to 1960s. The catchments were severely eroded and gullied and have been reforested over the last half century. The archived hydrologic records were stored in the Coweeta Hydrologic Laboratory data vault since 1962. Contemporary hydrologic responses of the catchments will be compared with those that are historic. The three experimental catchments reside within the much larger Holcombe's Branch, a tributary of the Tyger River. The Holcombe's Branch basin will be used to examine the erosion's interactions with soil carbon gains and losses.

134 - 157 m   Elev

16 °C   Temp

1250 mm   Precip

Parent Field Area:
Calhoun Critical Zone Observatory ▲

A soon-to-be upgraded watershed research site at the Calhoun CZO in the Southeast Piedmont.


unconsolidated materials, igneous-felsic intrusive, meta-igneous

Soil Order


Land Use

agricultural land, forest land

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