Measurements of Monostatic Bottom Backscattering Strengths in Shallow Water of the Yellow Sea

Wuju Son; Su-Uk Son; Jee Woong Choi; Sungho Cho; Seom-Kyu Jung

doi:10.7776/ASK.2015.34.6.444

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Measurements of Monostatic Bottom Backscattering Strengths in Shallow Water of the Yellow Sea 서해 천해환경에서 단상태 해저면 후방산란강도 측정

30 November 2015. pp. 444-454

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Abstract

Measurements of bottom backscattering strengths in a frequency range of 6-14 kHz were made on the shallow water off the southern Gyeonggi Bay in Yellow Sea in May 2013, as part of the KIOST-HYU joint acoustics experiment. Geological surveys for the experimental area were performed using multi-beam echo sounder, sparker system, and grab sampling to investigate the bottom topography, sub-bottom profile and composition of surficial sediment, respectively. In this paper, the backscattering strengths as a function of grazing angle (in range of 28° ~ 69°) were estimated and compared to the predictions obtained by Lambert’s law and APL-UW scattering model. Finally, the effects of geoacoustic parameters corresponding to the experimental area on the backscattering strengths are discussed.

Keywords

Bottom backscattering

Reverberation

Bottom roughness

Seafloor volume scattering

한국해양과학기술원과 한양대학교가 2013년 5월 서해 경기만 남부의 연안해역에서 공동으로 수행한 해양음향 실험에서 주파수 6 ~ 14 kHz에 대한 해저면 후방산란강도 측정이 실시되었다. 실험해역의 지질 환경 특성은 다중빔음향측심기, 스파커, 그랩을 이용하여 조사되었으며, 이로부터 정밀 해저지형 및 해저면 하부지층 구조, 표층 퇴적물 구성성분에 대한 자료를 획득하였다. 본 논문에서는 수평입사각 28° ~ 69°에 대한 해저면 후방산란강도 결과를 도출하여 람베르트 법칙(Lambert’s law) 및 APL-UW 산란 모델과 비교하였다. 또한 실험해역의 해양물리/지형학적 특성을 고려하여 해저면 후방산란 특성에 영향을 미치는 지음향 인자들에 대한 토의를 수행하였다.

키워드

해저면 후방산란강도

잔향음

해저면 거칠기

해저면 체적산란강도

References

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 34
No :6
Pages :444-454
Received Date : 2015-04-23
Revised Date : 2015-07-27
Accepted Date : 2015-08-23
DOI :https://doi.org/10.7776/ASK.2015.34.6.444

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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