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First International Symposium on Soil Water Measurement Using Capacitance and Impedance November 6-8, 2002 Beltsville, Maryland, USA Home

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Real-Time Soil Water Dynamics Monitoring using Capacitance and Impedance A Global View Ioan Caton Paltineanu PALTIN International Inc. Home

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Global Distribution of Water Adapted from R. M. Hordon, 2000, Hyrology, Ch. 4.5 in Standard Handbook of Environmental Science, Health, and Technology, Editor J. H. Lehr, McGraw-Hill LocationSurface Area (1000 sq km) Water Volume (1000 cubic km) Percentage of Total Water Total510,0001,400,000100 Fresh Water149,00035,0002.5 Surface Water1,236910.009 Subsurface Water130,0008,5000.61 Soil moisture & vadose zone 130,000670.005 Ground water 1km deep 130,0004,2000.3 Home

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Hydrologic Cycle of Water Adapted from R. M. Hordon, 2000, Hydrology, Ch. 4.2 in Standard Handbook of Environmental Science, Health, and Technology, Editor J. H. Lehr, McGraw-Hill Residence Time Atmosphere8 days Streams17 days Lakes10 years Shallow Groundwater330 years Deep Groundwater5,000+ years Soils???? Home

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Main Root Zone Profile 0 - 6 cm. 6 150 cm CURRENT STUDIESPALTIN PROPOSAL O 150 cm (sensors at 10 cm intervals) Discontinuous surface soil water content measurements using portable sensors. Real-time soil water profile dynamics monitoring (cluster of multisensor probes with radio and satellite telemetry) Fig. 5 Proposal for using clusters of independent multisensor capacitance or impedance probes with radio and satellite telemetry in studies of real-time soil water profile dynamics, as ground-truth for calibration of actual and future remote sensing sensors installed on aircraft and orbital platforms. (I.C. Paltineanu, 2002, Real-time Soil Water Dynamics Monitoring using Capacitance and Impedance A Global View, Transactions of The First International Symposium on Soil Water Measurement Using Capacitance and Impedance, Beltsville, Maryland, USA, November 6-8, 2002. Home

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Figure 4.6.8 Year around cumulative soil water dynamics in one pair of NT-PT plots, with multisensor capacitance probes placed at the nontraffic interrow position; *, Probes removed for spring tillage operations. (I.C. Paltineanu & James L. Starr, 2000, Real-Time Soil Water Dynamics, Chapter 4, Hydrology, Section 4.6, Jay H. Lehr, Editor, Standard Handbook of Environmental, Science, Health and Technology, McGraw-Hill, pp. 4.45-4.57 Home

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Fig. 3.1.3.6-1. Sketches of three capacitance probe designs: (A,B) parallel electrodes in direct soil contact, and (C) cylindrical metal ring electrodes placed inside a polyvinyl chloride access pipe. (James L. Starr & I.C. Paltineanu, 2002, J.H. Dane and G.C. Topp, Co-editors, Methods of Soil Analysis, Part 4, Physical Methods, Soil Science Society of America Book Series, Madison, Wisconsin, USA. Home

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Figure 4.6.6 Real-time soil water dynamics at four sensor depths in the corn-row, and showing the apparent water holding capacity and breaking points (Starr and Paltineanu, 1998b) Home

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Figure 4.6.7 Soil water dynamics (cumulative for 5 to 55 cm) during a period of high ET and full canopy for all eight plots. The vertical arrows approximate the breaking points between high and low rates of water loss, and the dashed lines represent the mean rates of water losses. (Starr and Paltineanu, 1998b). Home