Quantification of submarine groundwater discharge(SGD) using radon,radium tracers and nutrient inputs in Punnakayal,south coast of India |
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| Authors: | S Selvam P Muthukumar Sruthy Sajeev S Venkatramanan SY Chung K Brindha DS Suresh Babu R Murugan |
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| Institution: | Department of Geology, V.O.Chidambaram College, Thoothukudi, 628008, Tamilnadu, India;Department of Geology, V.O.Chidambaram College, Thoothukudi, 628008, Tamilnadu, India;Registration No:19212232221045, Affiliated to Manonmaniam Sundaranar University, Tirunelveli, 627 012, Tamil Nadu, India;Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;Department of Disaster Management Alagappa University, Karaikudi, Tamil Nadu, India;Department of Earth&Environmental Sciences, Pukyong National University, Busan, 608-737, South Korea;Freie Universit?t Berlin, Institut für Geologische Wissenschaften, Arbeitsbereich Hydrogeologie, Malteserstraβe 74, 100 12249, Berlin, Germany;Centre for Earth Sciences Studies, Akkulam, Tiruvanthapuram, 695 031, India |
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| Abstract: | The present study focused on the estimation of submarine groundwater discharge (SGD) and the effects of nutrient fluxes due to the SGD process. The parameters of SGD such as magnitude, character, and nutrient flux in Punnakayal region of South East coast of India were evaluated using multiple tracers of groundwater inputs in 2019. It was found that the elevated values for the tracers in the study area, displayed a gradational change in the values as move from estuarine part to the offshore. Simultaneous occurrence of fresh and saline SGD is observed on the study sites. Also, indicated that the SGD fluxes ranged from 0.04 to 0.12 ?m3 ?m?2 ?d?1 ?at the estuary and 0.03–0.15 ?m3 ?m?2 ?d?1 ?at the groundwater site. A substantially increased value for 222Rn activities is distinguished in the estuary to values over 312 dpm L?1. Nutrient embellishments were generally greatest at locations with substantial meteoric elements in groundwater; however, the recirculation of saltwater through the geological formation could provide a way of transferring terrestrially-derived nutrients to the coastal zone at many places. |
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| Keywords: | SGD Radon Radium Nutrients Coastal zone Box model |
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