Monitoring of Chlorophyll-a Levels in Lakes

Mirjana Horvat (), Zoltan Horvat and Emese Kutassy
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Mirjana Horvat: Faculty of Civil Engineering Subotica, University of Novi Sad, Kozaracka 2a, 24000 Subotica, Serbia
Zoltan Horvat: Faculty of Civil Engineering Subotica, University of Novi Sad, Kozaracka 2a, 24000 Subotica, Serbia
Emese Kutassy: Faculty of Water Sciences, Ludovika University of Public Service, Bajcsy-Zsilinsky utca 12–24, 6500 Baja, Hungary

Sustainability, 2025, vol. 17, issue 16, 1-23

Abstract: This study aimed to examine the possibility of introducing a more sustainable system for Chlorophyll-a monitoring in Lakes Palic and Ludas. The approach was based on identifying relationships between Chlorophyll-a concentrations and environmental indices to establish equations for predicting future estimates of Chlorophyll-a concentrations. Consequently, we employed remote sensing techniques, utilizing Sentinel-2 LC1 products and the SNAP software for data processing, to extract and manipulate satellite images for this purpose. The atmospheric corrections were performed using the C2RCC algorithm. The obtained images were used to extract water, resulting in normalized reflectance values that were then used to calculate a set of environmental indices. Evaluating the correlation between Chlorophyll-a concentrations and calculated indices helped select the indices for the models. Lastly, we assessed the developed models through statistical tests and via standard verification procedures. The results varied from good and reliable to unreliable, depending on the specific location. It was noted that this method of forecasting Chlorophyll-a concentrations is not suitable for lakes under significant influence of artificial factors. Further refining of the modeling procedure could make the models more dependable.

Keywords: remote sensing; satellite images; lake monitoring; Chlorophyll-a (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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