DOI QR코드

DOI QR Code

모래와 실트의 탁수에 대한 분광특성 분석

Analysis of Spectral Reflectance Characteristics for Sand and Silt Turbid Water

  • 신형섭 (충북대학교 농업생명환경대학 지역건설공학과 대학원) ;
  • 이규호 (충북대학교 농업생명환경대학 지역건설공학과 대학원) ;
  • 박종화 (충북대학교 농업생명환경대학 지역건설공학과)
  • 발행 : 2009.05.31

초록

The objective of this study was to investigate the basic relationships between spectral reflectance and varying concentrations of sediment in surface waters. An experimental method for determining suspended sediment concentration (SSC) in the water by use of a spectroradiometer above the water surface, in visible and near-infrared (NIR) wavelengths, is applied. The main advantage of the method is the direct comparison of spectral reflectance and the SSC, but it requires an accurate knowledge of the water body and sediment. Therefore numerous spectroradiometric measurements are carried out in situ measurements, for SSC, ranging from zero to 100 percentage and two types of sediment applied in the water tank. The results indicate that the suspended sediment causes increasing spectral reflectance response in waters. We observed that spectral reflectance increases with SSC, first at the lower wavelengths (430-480 nm), then in the middle wavelengths (570-700 nm), and finally, in the NIR domain (800-820 nm); a characteristic maximum reflectance appears at 400-670 nm. Relationships between the wavelength, integral value, and the SSC were evaluated on the basis of the regression analysis. The regression curve for the relation between the wavelength, integral value, and the SSC were determined ($R^2$>0.98). Finally, the specular wavelength can be estimated to recognize the sediment and to improve SC estimation accuracy in the water.

키워드

참고문헌

  1. Amos, C. L., and B. S. Toplins, 1985. Discrimination of suspended particulate matter in the Bay of Fundy using the Nimbus Coastal Zone Color Scanner. Can. J. of Remote Sensing 11: 85-92 https://doi.org/10.1080/07038992.1985.10855080
  2. Bhargava, D. S., and D. W. Mariam, 1990, Spectral reflectance relationships to turbidity generated by different clay materials. Photo. Eng. and Remote Sensing 56: 225-229
  3. Cho, H. Y., B. O. Kim, and B. J. Cho, 2002. Observation of SS Concentration on Coastal Waters off the Gaduk Island. Korean Society of Coastal and Ocean Engineers, 224-231 (in Korean)
  4. Clark, H. E., 1987. Soil erosion: off-site environmental effects. In Agricultural Soil Loss: process, policies, and prospects, edited by J. M. Harlim and G. M. Berardi, Westview Press: 59-90
  5. Goodin, D. G., L. Han, R. N. Fraser, D. C. Rundquist, W. A. Stebbins, and J. F. Schalles, 1993. Analysis of suspended solids in water using remotely sensed high resolution derivative spectra. Photo. Eng. and Remote Sensing 59: 505-510
  6. Han, L., 1997. Spectral reflectance with varying suspended sediment concentrations in clear and algae-laden waters, Photo. Eng. and Remote Sensing 63(6): 701-705
  7. Kameyama, S., F. Nakamura, and M. Kaneko, 2001. Development of WTI and turbidity estimation model using SMA-Application to Kushiro Mire, Eastern Hokkaido, Japan, Remote Sensing of Environment 77 (1): 1-9 https://doi.org/10.1016/S0034-4257(01)00189-4
  8. Lee, J. S., B. J. Myeng, and Y. K. Cha, 2006. Measurements of Vertical Profiles in Suspended-Load Concentration Using the ASM-IV, Journal of the Korean Society of Hazard Mitigation 6(1): 83-95 (in Korean)
  9. Lodhi, M. A., D. C. Rundquist, L. Han, and M. S. Kuzila, 1997. The potential for remote sensing of loess soils suspended in surface waters. J. of the American Water Resources Association 33(1): 111-117 https://doi.org/10.1111/j.1752-1688.1997.tb04087.x
  10. Parsegian, V. A., 2005. Van Der Waals Forces, Cambridge Univ. Pr
  11. Quibell, G., 1991. The effect of suspended sediment on reflectance from freshwater algae. Int. J. of Remote Sensing 12: 177-182 https://doi.org/10.1080/01431169108929642
  12. Simis, S. G. H., S. W. M. Peters, and H. J. Gons, 2005. Remote sensing of the cyanobacterial pigment phycocyanin in turbid inland water, Limnology and Oceanography 50(1): 237-245 https://doi.org/10.4319/lo.2005.50.1.0237