university of nebraska carbon sequestration program
Post on 22-Dec-2015
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TRANSCRIPT
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- University of Nebraska Carbon Sequestration Program
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- Soil Moisture Monitoring and Modeling in the Nebraska Carbon Sequestration Project Kenneth G. Hubbard Todd T. Schimelfenig and Cynthia J. Hays University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program Objective To provide continuous measurements of rainfall, irrigation and root-zone soil water for the overall study on carbon sequestration and real-time data for use in irrigation management
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- University of Nebraska Agricultural Research Development Center Ithaca NE 1.Continuous irrigated maize 2.Irrigated maize/soybean rotation 3.Rain fed maize/soybean rotation
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- University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program SYSTEM COMPONENTS Free Wave spread spectrum wireless data transceiver Campbell Scientific datalogger Theta-probe soil moisture sensor Tipping bucket rain gauge
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- University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program www.hprcc.unl.edu/soilm/home.html
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- University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program
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- (Mahmood and Hubbard, 2003) University of Nebraska Carbon Sequestration Program S/t = p + I - ET - R o - D r S = v z, the equivalent depth of water in the soil z = layer depth v = volumetric water content t = time p = precipitation I = irrigation ET = evapotranspiration R o = runoff D r = drainage
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- University of Nebraska Carbon Sequestration Program
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- University of Nebraska Carbon Sequestration Program Conclusions Theta probes should be calibrated for each soil type It is important to include calibration set-points that are near the end of the range (wilting point & field capacity) Clay soils present considerable challenge because of swelling, shrinking, and cracking Quick disconnects and buried tubes ensure that sensors in agricultural fields are undisturbed from year-to-year
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- THE END
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- University of Nebraska Carbon Sequestration Program