Integration of Sentinel-2A Imagery and Laboratory Measurements for Estuarine Pb and TSS Concentration Monitoring in Suwung, Denpasar City, Indonesia
I Made Yuliara *
Department of Physics, Udayana University, Bali, Indonesia.
Ni Nyoman Ratini
Department of Physics, Udayana University, Bali, Indonesia.
I. Gde Antha Kasmawan
Department of Physics, Udayana University, Bali, Indonesia.
*Author to whom correspondence should be addressed.
Abstract
Research has been carried out on integrating the results of Sentinel-2A and laboratory image data measurements in the form of a mathematical model that can be used to estimate the concentration and spatial distribution of Pb and Total Suspended Solid (TSS) of the Suwung estuary, Denpasar city, Bali, Indonesia. Integration is carried out using the regression method and correlation of the pixel value measurement results of the Sentinel-2A and laboratory images. Pixel values in Sentinel-2A image data which represent TSS concentrations are obtained by applying the TSS algorithm and Pb pixel values through Sentinel-2A band matching. The number of samples tested was 30 which were taken and measured at predetermined coordinate points. There are differences in the results of concentration measurements, both Pb and TSS obtained from laboratory measurements with Sentinel-2A pixel values. The integration results obtained in the form of a mathematical model in this research are for Pb, it is p=33.757q – 1.1345 and for TSS it is y=1.0213x – 0.2921. The variables p and y are the results of laboratory measurements, while the variables q and x are the results of measuring the Sentinel-2A pixel values. The spatial distribution of Pb detected was mostly on the west side and a small part on the east and north. For TSS, most of it is upstream in the north, while a small part is in the south and east.
Keywords: Total suspended solid (TSS), potensial pb, suwung estuaries, Sentinel-2A
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