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Gholamalifard, M., Esmaili Sari, A., Abkar, A., Naimi, B.. (1392). Bathymetric Modeling from Satellite Imagery via Single Band Algorithm (SBA) and Principal Components Analysis (PCA) in Southern Caspian Sea. , 7(4), 877-886. doi: 10.22059/ijer.2013.669
M. Gholamalifard; A. Esmaili Sari; A. Abkar; B. Naimi. "Bathymetric Modeling from Satellite Imagery via Single Band Algorithm (SBA) and Principal Components Analysis (PCA) in Southern Caspian Sea". , 7, 4, 1392, 877-886. doi: 10.22059/ijer.2013.669
Gholamalifard, M., Esmaili Sari, A., Abkar, A., Naimi, B.. (1392). 'Bathymetric Modeling from Satellite Imagery via Single Band Algorithm (SBA) and Principal Components Analysis (PCA) in Southern Caspian Sea', , 7(4), pp. 877-886. doi: 10.22059/ijer.2013.669
Gholamalifard, M., Esmaili Sari, A., Abkar, A., Naimi, B.. Bathymetric Modeling from Satellite Imagery via Single Band Algorithm (SBA) and Principal Components Analysis (PCA) in Southern Caspian Sea. , 1392; 7(4): 877-886. doi: 10.22059/ijer.2013.669

Bathymetric Modeling from Satellite Imagery via Single Band Algorithm (SBA) and Principal Components Analysis (PCA) in Southern Caspian Sea

International Journal of Environmental Research
مقاله 7، دوره 7، شماره 4، دی 2013، صفحه 877-886    اصل مقاله (3.14 M)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22059/ijer.2013.669
نویسندگان
M. Gholamalifard1؛ A. Esmaili Sari* 1؛ A. Abkar2؛ B. Naimi3
1Department of Environment, Faculty of Natural Resources, Tarbiat Modares University, Noor, Mazandaran, Iran
2Faculty of Geodesy and Geomatics Eng., K. N. Toosi University of Technology, Tehran, Iran
3Faculty of Geo-Information Science and Earth Observation (ITC), Enschede, The Netherlands
چکیده
Remotely sensed imagery is proving to be a useful tool to estimate water depths in coastal
zones. Bathymetric algorithms attempt to isolate water attenuation and hence depth from other factors by
using different combinations of spectral bands. In this research, images of absolute bathymetry using two
different but related methods in a region in the southern Caspian Sea coasts has been produced. The first
method used a Single Band Algorithm (SBA) and assumed a constant water attenuation coefficient throughout the blue band. The second method used Principal Components Analysis (PCA) to adjust for varying water attenuation coefficients without additional ground truth data. PCA method (r=-0.672394) appears to match our control points slightly better than single band algorithm (r=-0.645404). It is clear that both methods can be used as rough estimates of bathymetry for many coastal zone studies in the southern Caspian Sea such as near shore fisheries, coastal erosion, water quality, recreation siting and so forth. The presented methodology can be considered as the first step toward mapping bathymetry in the southern Caspian Sea. Further research must investigate the determination of the nonlinear optimization techniques as well as the assessment of these models’ performance in the study area.
کلیدواژه‌ها
Bathymetry؛ Satellite Imagery؛ Single Band Algorithm (SBA)؛ Principal Components Analysis (PCA)؛ Caspian Sea
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