Celebrating an inspiring student achievement as Ms Namitha Mundankuzhi, M.Sc. Environmental Science student from the Department of Environmental Science and Engineering, marks a significant milestone with her research publication in Physics and Chemistry of the Earth.

Her paper, “Coupled dynamics of submarine groundwater discharge and coastal productivity: Insights from tidal to interannual variability,” explores how submarine groundwater discharge—an often unseen process—plays a vital role in shaping coastal productivity. By examining nutrient fluxes, tidal dynamics, and seasonal variations along the Nizampatnam coast, the research highlights how invisible groundwater pathways influence marine ecosystems and productivity patterns. The findings also underline the importance of integrating groundwater management with coastal conservation to sustain ecological balance and mitigate risks such as algal blooms.

Abstract

Terrestrial inputs, such as submarine groundwater discharge (SGD) and river discharge, modulate primary production in coastal estuaries, but exposing their independent roles remains challenging. Mechanistically, the coastal zone operates as a dynamic subterranean estuary, where tidal pumping regulates surface water-groundwater mixing, nutrient mobilization and transport to surface water. Therefore, this study examined the interactive role of nutrient flux and tidal variability on primary productivity along the Nizampatnam coast (Andhra Pradesh, India) by the application of radiogenic isotope like 222 Rn and nutrients like NO 3 – +NO 2 – (NO x) and PO 4 3- along with the chlorophyll-a as a productivity- indicator across two different pre-monsoon seasons (2024 and 2025) in relation with tidal variations. However, maximum productivity has been observed in river water than seawater during mid-tide conditions (2025), attributed to the strong SGD-driven nutrient fluxes. Therefore, integrating effective groundwater management into coastal ecosystem protection is essential to mitigate algal bloom risks and sustain ecosystem health in such type of dynamic coastal environments.

With an Impact Factor of 4.1 (Q1), this publication reflects both academic rigour and the growing contribution of young researchers to solving real-world environmental challenges.

This achievement stands as a testament to curiosity-driven inquiry, persistence, and the power of student-led research in advancing scientific understanding.