Browsing by Author "Zammit, Amy"
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- A comparative study of multispectral and hyperspectral remote sensing techniques for the detection of chlorophyll-a concentrations in coastal areasPublication . Zammit, Amy; Jalluri, Chaitanya; Luis, JoaquimCoastal water quality (CWQ) monitoring is essential for managing harmful algal blooms and assessing marine ecosystem health, with chlorophyll-a (chl-a) serving as a proxy for phytoplankton biomass. The study compared the Ocean Color x (Ocx) algorithm’s performance in detecting chl-a concentrations using multispectral (Sentinel-2) and hyperspectral (Airborne Visible/InfraRed Imaging Spectrometer [AVIRIS]) imagery at three coastal sites, compared against in-situ measurements. Sentinel-2 provided moderate accuracy but struggled to capture small-scale variability in complex environments. Conversely, AVIRIS showed better detection due to its finer spectral resolution, though its accuracy was inconsistent, likely due to data processing limitations and environmental factors. The study suggests the integration of both imaging techniques to enhance CWQ monitoring and highlights the need for refined algorithms and aligning in-situ data collection with remote sensing acquisitions.