Microwave penetration in soils

Soil oil petroleum product pollution represents a great environmental threat as it may contaminate the neighboring soils and surface and underground water. Liquid fuel contamination may occur anywhere during oil petroleum product transportation, storing, handling and utilization. The polluted soil recovery represents a complex process due to the wide range of physical, chemical and biological properties of soils which should be analyzed in connection with the study of the contaminated soil behavior under the microwave field action. The soil, like any other non-metallic material, can be heated through microwave energy absorption due to the dielectric losses, expressed by its dielectric complex constant.
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Archive - California Agriculture

This chapter mainly describes the vegetated soil moisture retrieval approaches based on microwave remote sensing data. It will be comprised of three topics: 1 SAR polarimetric decomposition is to model the full coherency matrix as a summation of the surface, dihedral, and volume scattering mechanisms. After removing the volume scattering component, the soil moisture is estimated from the surface and dihedral scattering components. Particularly, various dynamic volume scattering models will be critically reviewed, allowing the readers to select the appropriate one to capture the complex variations of the volume scattering mechanism with crop phenological growth. Hereby, we will review the water cloud model and its several extensions for enhanced soil moisture retrieval. Soil Moisture. Soil moisture is an important factor influencing the food supply to human beings at the small scale, and also an essential climate change variable that needs to be monitored at a large scale.
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Ground-penetrating radar

Trova questo libro nella versione stampata. Account Options Accedi. Biblioteca personale Guida Ricerca Libri avanzata. Acquista ebook - 7. Microwave Dielectric Behaviour of Wet Soils.
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The real and imaginary parts of the complex permittivity of soils of different textures are calculated at a single microwave frequency 9. In the view of active and passive microwave remote sensing, penetration depth for the microwaves within the moist soils of different textures is estimated treating uniform soil moisture profile for near surface soil layer. This was observed that penetration depth has the negative correlation with soil moisture content and hardly depends upon the texture at low soil moisture contents SMC. Penetration depth decreases as clay portion in the moist soil increases and this effect becomes more significant at higher moisture levels. Further, attenuation or power loss per unit length of the moist soils of different textures is also estimated.
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