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Eutrophication Modeling of Chilika Lagoon Using an Artificial Neural Network Approach

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Ecosystem and Species Habitat Modeling for Conservation and Restoration

Abstract

Chilika lagoon is the first Ramsar site in India located along the East Coast. Prediction of the eutrophication of such ecosystems is a key approach for a sustainable management perspective as it helps to formulate a management action plan. In the present study, a data-driven modeling approach, an artificial neural network (ANN), was used to predict eutrophication in the Chilika lagoon. Back-propagation neural network model was used to relate the major parameters that influence eutrophication indicators such as total nitrogen (TN), total phosphorus (TP), Secchi disc depth (SD), dissolved oxygen (DO), biological oxygen demand (BOD), pH, water temperature (WT), and Turbidity (TURB). The model evidenced an acceptable level of prediction when compared with the results of the field observations. This model’s most important determinant variables were those with a high Random Forest (RF) model permutation relevance ranking, which reduced the network’s structure and led to a more accurate and effective process. It demonstrated a high agreement between BOD and Turbidity. As per the TLI (trophic level index) estimation, the Chilika lagoon was observed to maintain an oligotrophic condition. However, there was a trophic switchover between the seasons and sectors. The study evidenced that the ANN was able to predict the indicators with reasonable accuracy, which could be proved as a valuable tool for the Chilika lagoon. This approach can be considered when developing a sustainable management and conservation action plan for Chilika and other similar aquatic ecosystems around the world.

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Acknowledgments

The authors are grateful to the CE, Chilika Development Authority (CDA), for providing required facilities at WRTC. This work was carried out with the funding support from the World Bank (ICZMP, Odisha) (CREDIT No. 4765-IN) and NPCA (National Plan for Conservation of Aquatic Ecosystems). Thanks are also due to Mr. Bibhuti B. Dora for preparing the Chilika GIS map. The supporting staff and researchers of CDA are also acknowledged for their generous help during the study.

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Correspondence to Pradipta R. Muduli .

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© 2023 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Acharya, P., Muduli, P.R., Das, M. (2023). Eutrophication Modeling of Chilika Lagoon Using an Artificial Neural Network Approach. In: Dhyani, S., Adhikari, D., Dasgupta, R., Kadaverugu, R. (eds) Ecosystem and Species Habitat Modeling for Conservation and Restoration. Springer, Singapore. https://doi.org/10.1007/978-981-99-0131-9_27

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