SRIMANTI DUTTAGUPTA
Articles written in Journal of Earth System Science
Volume 128 Issue 3 April 2019 Article ID 0044 Brief communication
Srimanti Duttagupta Animesh Bhattacharya Abhijit Mukherjee Siddhartha Chattopadhyay Soumendra Nath Bhanja Soumyajit Sarkar Pragnaditya Malakar Jayanta Bhattacharya
More than quarter of underprivileged global population, who lack access to basic sanitation and clean drinking water, live in India. Consequently, every year, millions suffer with enteric diseases from drinking faecal-contaminated groundwater. The UN Sustainable Development Goal lists access to safe water and basic sanitation for all by 2030, as their sixth goal. For the first time, the role of economic improvement on decrease in water-borne faecal pathogens was studied across Indo-Ganges–Brahmaputra river basin (IGB) for almost last three decades, to delineate the long-term improvement trends of groundwater quality across India, as a consequence of development. Long-term temporal (1990–2017) and high-resolution spatial (administrative block scale,
Volume 129 All articles Published: 10 January 2020 Article ID 0050 Research Article
Implication of submarine groundwater discharge to coastal ecology of the Bay of Bengal
KOUSIK DAS PALASH DEBNATH SRIMANTI DUTTAGUPTA SUKANTA SARKAR SUDHA AGRAHARI ABHIJIT MUKHERJEE
The present study is undertaken in the eastern coast of India, along the coastal tract of Bay of Bengal (BoB), to delineate the submarine groundwater discharge (SGD)-borne nutrient flux at temporal scale and their impact to coastal ecology and biogeochemical processes. Solutes chemistry, seepage meter study, stable-isotopic signature, and geophysical techniques were used to identify the surface water–groundwater interaction zone, SGD rate and nutrient flux. The estimated rate of major annual discharge of nutrient fluxes were 240 and 224 mM $\rm{m^{-2} day^{-1}}$ for $\rm{NO}_{3}^{-}$ and Fetot. The variation of solute and nutrient fluxes was depending on the load of terrestrial water masses, which is triggered by the local monsoonal meteoric recharge. The ecohydrological response to this solute flux results in spatio-temporal patterns of N and P-sensitive algal blooms in the intertidal zones. Most algae were identified as dinoflagellates and some haptophytes, with greenish and brownish hue that provides a distinct look to the coastal landscape. The algal blooms were found to be substantially influenced by the seasonal-nutrients flux and discharge location. Our study is expected to increase the understanding of a rarely reported ecohydrological response to terrestrial–marine water interactions and their implications in the tropical ocean adjoining the Indian Subcontinent.
Volume 129, 2020
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