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.

本研究的重点是海底地下水排放量（SGD）的估算以及由于SGD过程引起的养分通量的影响。在2019年使用多个示踪剂输入地下水对印度东南沿海Punnakayal地区的SGD参数进行了评估，如幅度，特征和养分通量。发现研究区域示踪剂的升高值显示出从河口部分到近海处的值的等级变化。在研究部位观察到新鲜SGD和盐水SGD同时发生。同样，表明SGD通量 在河口范围为0.04至0.12 m ³  m ^-2  d ^-1和0.03-0.15 m ³  m ^-2  d ^-1 在地下水现场。在河口将²²² Rn活度的大幅增加值区分为312 dpm L ^-1以上的值。在地下水中含有大量陨石元素的地方，营养点缀通常最大。然而，盐水通过地质构造的再循环可以提供一种将陆地来源的养分转移到许多地方的沿海地区的方法。