| Model ID: | M00033 | ||||||
| Model Name: | Dielectric model for frozen soil | ||||||
| Encoders: |
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| Key words: | Dielectric constant, Frozen soil, Freezing and thawing, Microwave remote sensing | ||||||
| Model Type: | Semi-empirical model | ||||||
| Latest Modified: | 2014/7/1 12:18:50 | ||||||
| Submission Date: | 2014/7/1 12:18:50 | ||||||
| Abstract: | Based on the semi-empirical dielectric mixing model for soil water mixture, an extension of model has been made to describe the dielectric constant change of frozen soil as a function of temperature. An empirical function Wu=A·|T-273.2|-B has been used for estimating the fractions of liquid water and ice in frozen soil, where Wu is unfrozen water content. A and B are parameters related to soil texture, T is temperature in K. The item for calculation of dielectric constant of ice fraction is also added to | ||||||
| Equation: |
| 1 |
Name: fre
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Parameter type: double
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Physic Entity: frequency，GHz
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| 2 |
Name: Sandc
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Parameter type: real
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Physic Entity: Sand content of soil
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| 3 |
Name: Clayc
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Parameter type: real
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Physic Entity: Clay content of soil
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| 4 |
Name: Bd
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Parameter type: real
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Physic Entity: Per unit volume of soil with the weight of dry soil
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| 5 |
Name: ts
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Parameter type: real
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Physic Entity: temperature
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| 6 |
Name: vms
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Parameter type: real
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Physic Entity: The weight of per unit volume of soil water
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| Title: | The estimation of dielectric constant of frozen soil-water mixture at microwave bands | ||||||||||||
| Authors: |
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| Cited by: | IEEE Trans. Geosci. Remote Sensing | ||||||||||||
| Abstract: | The microwave remote sensing is a promising method for detecting the freezing and thawing of soil surface due to change of dielectric constant when frozen. In frozen soil, not all liquid water freezes at or below 0°C. Based on the semi-empirical dielectric mixing model for soil water mixture, an extension of model has been made to describe the dielectric constant change of frozen soil as a function of temperature. An empirical function Wu=A?|T-273.2|-B has been used for estimating the fractions of liquid water and ice in frozen soil, where Wu is unfrozen water content. A and B are parameters related to soil texture, T is temperature in K. The item for calculation of dielectric constant of ice fraction is also added to |
Equation