Difference between revisions of "Soil moisture - TDR (HydroSense)"
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(New page: right|300px| ==Parameter to be measured:== Soil moisture ==Method:== TDR-method, display gives estimation of travle time in ms and water content after Topps equat...) |
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| − | TDR-method, display gives estimation of travle time in ms and water content after Topps equation | + | TDR-method, display gives estimation of travle time in ms and water content after Topps (1980) equation |
==Equipment:== | ==Equipment:== | ||
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==References== | ==References== | ||
Petrone, RM Price, JS, Carey, SK, Waddington, JM 2004. Statistical characterization of the spatial variability of soil moisture in a cutover peatland. HYDROL PROCESS 18(1), 41-52. | Petrone, RM Price, JS, Carey, SK, Waddington, JM 2004. Statistical characterization of the spatial variability of soil moisture in a cutover peatland. HYDROL PROCESS 18(1), 41-52. | ||
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| + | Topp, GC, Davis, JL, Annan, AP, 1980. Electromagnetic Determination of Soil Water Content: Measurements in Coaxial Transmission Lines. WATER RESOURCES RESEARCH, 16(3), 574-582. | ||
Wright, N, Quinton, WL, Hayashi, M 2008. Hillslope runoff from an ice-cored peat plateau in a discontinuous permafrost basin, Northwest Territories, Canada. HYDROL PROCESS 22(15) 2816-2828 | Wright, N, Quinton, WL, Hayashi, M 2008. Hillslope runoff from an ice-cored peat plateau in a discontinuous permafrost basin, Northwest Territories, Canada. HYDROL PROCESS 22(15) 2816-2828 | ||
Revision as of 15:32, 17 December 2008
Parameter to be measured:
Soil moisture
Method:
TDR-method, display gives estimation of travle time in ms and water content after Topps (1980) equation
Equipment:
- CAMPBELL: Two rod sensor CS620 with length of 120 mm and 200 mm and CD620 Hydrosensense Display
Advantages:
- easy and fast measurement of punctual soil moisture
- manual measurements
Disadvantages:
- Fractional digits of reflection time in ms: only one
- Careful application of probe in stony soils
- Accuracy: ±3% water content
What to watch out for:
- Good contact between probe and medium has to be proved
Problems/Questions:
Links
Other related web sites:
- CAMPBELL SCIENTIFIC: [1]
References
Petrone, RM Price, JS, Carey, SK, Waddington, JM 2004. Statistical characterization of the spatial variability of soil moisture in a cutover peatland. HYDROL PROCESS 18(1), 41-52.
Topp, GC, Davis, JL, Annan, AP, 1980. Electromagnetic Determination of Soil Water Content: Measurements in Coaxial Transmission Lines. WATER RESOURCES RESEARCH, 16(3), 574-582.
Wright, N, Quinton, WL, Hayashi, M 2008. Hillslope runoff from an ice-cored peat plateau in a discontinuous permafrost basin, Northwest Territories, Canada. HYDROL PROCESS 22(15) 2816-2828