Calhoun CZO Research Area 4

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One of four historic Calhoun experimental catchments, which were instrumented with precipitation and runoff gauges from the 1940s to 1960s. The catchment was severely eroded and gullied and has been reforested over the last half century. The archived hydrologic records and photographs have been stored in the Coweeta Hydrologic Laboratory data vault since 1962. Contemporary hydrologic responses of the catchments will be compared with the historical data.

0.42 km2   Area

Parent Field Area:
Calhoun Critical Zone Observatory ▲

Remains of the old weir at the historic watershed 1 research site in the Calhoun Experimental Forest.

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Setting & Research
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Data
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  • Setting & Research

    Research area 4 at the Calhoun CZO includes the first of the historical weirs in the Calhoun Experimental Forest, located in an area of eroded abandoned agricultural land known as watershed 1. This weir was instrumented from the 1940s to the 1960s. Complementing this eroded watershed, which is now covered with pine forest, is a nearby watershed that was likely not cultivated and has seen little erosion. This watershed has been covered with mature hardwood forest since at least 1933 (as seen in historic USFS photos).

    Brown and Arthur cleaning mud out of Weir 1 ponding basin, May 2, 1955.

    Contour map of Watershed 1, Calhoun Exp. Forest. Showing check dams and stream diversion works, 1/28/1958.

    Cover Type Map of Watershed 1, Calhoun Exp. Forest showing instrument location, 1/28/1958.


    Gullied land above weir 1. Original caption: View from Camera point A before treatment. Taken on ladder. Lens about 12 feet about ground. RRG [recording rain gage] #9 in left foreground. Soil moisture plot 2 in rear, CEF. Photo: 4/1/1954 by L.J.M.

    Planted loblolly pine coming through the serecia. Camera point A. August 1959, Photo: L.J.M.

    View taken from Camera Point A. Taken from Ladder with lens 12 above ground level. Picture made in 1962 after stablilization with Lespedeza and Loblolly pine. Photo: L.J.M.

    View from Camera point A eight years after treatment and seven years after pines were planted. September 1963. Photo: Douglass.

    Brown and Arthur cleaning mud out of Weir 1 ponding basin, May 2, 1955.

    Contour map of Watershed 1, Calhoun Exp. Forest. Showing check dams and stream diversion works, 1/28/1958.

    Cover Type Map of Watershed 1, Calhoun Exp. Forest showing instrument location, 1/28/1958.

    Gullied land above weir 1. Original caption: View from Camera point A before treatment. Taken on ladder. Lens about 12 feet about ground. RRG [recording rain gage] #9 in left foreground. Soil moisture plot 2 in rear, CEF. Photo: 4/1/1954 by L.J.M.

    Planted loblolly pine coming through the serecia. Camera point A. August 1959, Photo: L.J.M.

    View taken from Camera Point A. Taken from Ladder with lens 12 above ground level. Picture made in 1962 after stablilization with Lespedeza and Loblolly pine. Photo: L.J.M.

    View from Camera point A eight years after treatment and seven years after pines were planted. September 1963. Photo: Douglass.

  • Overview Maps

    CCZO R4

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  • Dynamic Map

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  • Data

    Calhoun CZO - LiDAR - LiDAR Leaf-Off Survey (2016)
    1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

    Calhoun CZO - LiDAR - Hyperspectral and LiDAR Survey (2014)
    1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas    GIS / Remote Sensing    National Center for Airborne Laser Mapping

    Calhoun CZO - Soil Survey - Soil Texture (2014-2015)
    3 components    Calhoun CZO Research Area 3, Calhoun CZO Research Area 4    Soil Science / Pedology    Heine, Paul

    Calhoun CZO - Vegetation - Litterfall (2014-2017)
    1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4, Calhoun CZO Research Area 5    Biology / Ecology    O'Neill, K. P.; Cook, C. W.; Richter, D. deB.

    Calhoun CZO - Vegetation - Leaf Area Index (2014)
    1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun Eco-hydrology Experiments    Biology / Ecology    Cook, Charles W.

    Calhoun CZO - Soil Porosity, Soil Invertebrates (2015-2017)
    2 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Soil Science / Pedology, Biology / Ecology    Z.S. Brecheisen, M.A. Callaham, P.R. Heine, C.W. Cook, D. deB Richter

    Calhoun CZO - Soil Texture - Argillic Horizon (2016-2017)
    1 components    Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4    Soil Science / Pedology    Ryland, Rachel C.

    Calhoun CZO - Soil Texture (2015)
    1 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4    Soil Science / Pedology    Heine, Paul R

    Research areas 1, 4, 7 - Soil Gas (2015-2017)
    2 components    Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7    Biogeochemistry, Soil Science / Pedology    Brecheisen, Z. S.; Cook, C. W.; Richter, D. deB.

  • Partner Organizations