Quantification of submarine groundwater discharge(SGD) using radon,radium tracers and nutrient inputs in Punnakayal, south coast of India

作者：S.Selvam,P.Muthukumar,Sruthy Sajeev,S.Venkatramanan,S.Y.Chung,K.Brindha,D.S.Suresh Babu,R.Murugan

摘要：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 m^3 m^-2d^-1 at the estuary and0.03-0.15 m^3 m^-2d^-1at the groundwater site.A substantially increased value for 222 Rn 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.

发文机构：Department of Geology Registration No:19212232221045 Department for Management of Science and Technology Development Faculty of Applied Sciences Department of Earth&Environmental Sciences Freie Universitat Berlin Centre for Earth Sciences Studies Department of Disaster Management

关键词：SGDRADONRADIUMNUTRIENTSCoastalzoneBoxmodel

分类号： P64[天文地球—地质矿产勘探]