Experimental study of C-band microwave scattering characteristics during the emulsification process of oil spills

Sijing Shu; Junmin Meng; Xi Zhang; Jie Guo; Genwang Liu

doi:10.1007/s13131-020-1612-4

Volume 39 Issue 7

Jul. 2020

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Sijing Shu, Junmin Meng, Xi Zhang, Jie Guo, Genwang Liu. Experimental study of C-band microwave scattering characteristics during the emulsification process of oil spills[J]. Acta Oceanologica Sinica, 2020, 39(7): 135-145. doi: 10.1007/s13131-020-1612-4

Citation:

Sijing Shu, Junmin Meng, Xi Zhang, Jie Guo, Genwang Liu. Experimental study of C-band microwave scattering characteristics during the emulsification process of oil spills[J]. Acta Oceanologica Sinica, 2020, 39(7): 135-145. doi: 10.1007/s13131-020-1612-4

Citation:

Sijing Shu, Junmin Meng, Xi Zhang, Jie Guo, Genwang Liu. Experimental study of C-band microwave scattering characteristics during the emulsification process of oil spills[J]. Acta Oceanologica Sinica, 2020, 39(7): 135-145. doi: 10.1007/s13131-020-1612-4

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Experimental study of C-band microwave scattering characteristics during the emulsification process of oil spills

doi: 10.1007/s13131-020-1612-4

Sijing Shu^{1, 2},
Junmin Meng^{1, 2
,
,},
Xi Zhang^{1, 2},
Jie Guo³,
Genwang Liu^{1, 2}

1.
First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
2.
Ocean Engineering Technology Innovation Center, Ministry of Natural Resources, Qingdao 266061, China
3.
Yantai Institute of Coastal Zone Reaearch, Chinese Academy of Sciences, Yantai 264003, China

Funds: The National Key R&D Program of China under contract No. 2016YFC1401000; The National Natural Science Foundation of China under contract Nos 41576032 and 41706208.

More Information

Corresponding author: E-mail: mengjm@fio.org.cn
Received Date: 2019-10-09
Accepted Date: 2020-01-13

Available Online: 2020-12-28

Publish Date: 2020-07-25

Abstract

Abstract

In this study, oil spill experiments were performed in a water tank to determine changes in the surface scattering characteristics during the emulsification of oil spills. A C-band fully-polarimetric microwave scatterometer and a vector network analyzer were used to observe films of the following oils: crude oil with an asphalt content below 3% that is prone to emulsification (type A), fresh crude oil extracted from an oilfield (type B), and industrial crude oil that was dehydrated and purified (type C). The difference in the backscatter results between the emulsified oil film and the calm water surface under C-band microwaves and the influence of the emulsification of the oil film on the backscatter were analyzed in detail. The results demonstrate that under a low-wind and no-waves condition (the maximum wave height was below than 3 mm), the emulsification of crude oil could modulated the backscatter through changes in the surface roughness and the dielectric constant, where the surface roughness had the dominant effect. The surface backscatters of the type B oil were greater than that of the type C oil in both the emulsified and non-emulsified states. In the non-emulsified state, the average differences in the backscatter between the type B and C oils were 2.19 dB, 2.63 dB, and 2.21 dB for the polarization modes of VV, HH, and HV/VH, respectively. Smaller corresponding average differences of 0.98 dB, 1.49 dB, and 1.5 dB were found for the emulsified state with a 20% moisture constant for the oil film. The results demonstrated that the surface roughness of the different oil films could vary due to the differences in the oil compositions and the oil film properties, which in turn affect the backscatter of the oil film surface.
- microwave scattering characteristics of oil spill,
- emulsification of crude oil,
- experiment of oil spill,
- backscatter

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References(34)

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