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Groundwater Discharge to the Bay of Bengal: Hydrological, Societal, and Environmental Implication to the Ocean

  • Palash Debnath
  • Abhijit MukherjeeEmail author
Chapter
Part of the Springer Hydrogeology book series (SPRINGERHYDRO)

Abstract

The interaction of two of the largest hydrological systems, groundwater and seawater, takes place along the coast, either by seawater intrusion to land (SWI) or submarine groundwater discharges (SGD). Groundwater discharge from the coastal aquifers to the oceans takes place when the elevation of the water table of coastal aquifers is higher than the mean sea level, varying seasonally and tidally. SGD provides a route for escape of a large portion of the usable groundwater resource, solutes, and contaminants to sea. The chemical evolution and redox transformation of SGD are poorly understood, especially at the subsurface freshwater discharge zone. Globally, there have been several studies to understand the coastal hydrodynamics of the SGD; however, there is a serious lack of such knowledge from the coastal aquifers of the Indian subcontinent. The present chapter demonstrates the details of groundwater discharge to the Bay of Bengal, India (BOB). Our study result shows that SGD can add a huge amount of solutes and nutrients to the BOB, which is likely to have a great impact on BOB ecosystem. Hence, understanding the dynamics of SGD in coastal parts of India is an extremely interesting scientific question along with its societal importance and environmental implications. It is expected that the knowledge and information provided in this chapter would enhance the understanding of the coastal hydrodynamics in site-specific scales and extrapolated, larger scales along the BOB and would be useful in making regional coastal management plan or integrated coastal management plan.

Keywords

Submarine groundwater discharge Bay of Bengal Coastal hydrodynamics Solutes and nutrients Ecosystem 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Department of Geology and GeophysicsInstitute of Technology (IIT)—KharagpurKharagpurIndia
  2. 2.National Institute of Hydrology RoorkeeRoorkeeIndia
  3. 3.School of Environmental Science and EngineeringIndian Institute of Technology (IIT)—KharagpurKharagpurIndia
  4. 4.Applied Policy Advisory to Hydrogeosciences GroupIndian Institute of Technology (IIT)—KharagpurKharagpurIndia

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