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The Interaction of Chlorophyll-a and Total Suspended Matter along the Western Semarang Bay, Indonesia, Based on Measurement and Retrieval of Sentinel 3
 
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1
Department of Oceanography, Faculty of Fisheries and Science Marine, Diponegoro University, Jl. Prof. Sudharto, SH, Tembalang, Semarang 50275, Indonesia
2
Undergraduate Programs Oceanography, Faculty of Fisheries and Science Marine, Diponegoro University, Semarang 50275, Indonesia
3
Research Center for Oceanography, Indonesian Institute of Sciences (LIPI), Pasir Putih Raya 1, Ancol Timur, Jakarta 14430, Indonesia
CORRESPONDING AUTHOR
Lilik Maslukah   

Department of Oceanography, Faculty of Fisheries and Science Marine, Diponegoro University, Jl. Prof. Sudharto, SH, Tembalang, Semarang 50275, Indonesia
 
 
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ABSTRACT
The Kendal Regency area is one of the areas on the northern coast of Central Java that has been experiencing rapid industrial development. The high human activity in this area will impact the quality of water in these surrounding areas and affect the fertility of the waters. The concentrations of chlorophyll-a (Chl-a) and total suspended matter (TSM) are major water quality parameters that can be retrieved using remotely sensed data. The retrieval satellite of the 3 OLCI chosen in this study has a 300 m spatial resolution. This study aimed to see the distribution and effect of total suspended matter (TSM) on chlorophyll-a based on measurement and retrieval of Sentinel 3 imagery using the linear regression method. The results show the chlorophyll-a distribution and the value from retrieval satellite are higher and larger surface area compared to chlorophyll-a measurements. The linear regression model of chlorophyll-a by retrieval satellite imagery and measurement is y = 0.65x + 4.65 with R2= 0.54. The presence of high suspended solids in the waters causes disturbances in the reflectance values, which are recorded by the retrieval of satellite. The model regression chlorophyll-a with TSM accuracy from retrieval satellite results in the equation y =-0.0416x + 5.14 (R2 = 0.45, p = 0.05, n = 13). The determination (R2) coefficient value is 0.445, which means that suspended has a 44.5% effect on chlorophyll-a and 55.5% is influenced by other factors and not examined in this study. The results show that TSM has an influence on the accuracy of chlorophyll-a and retrieval satellite recording can be disrupted if waters have high turbidity.