Assessing groundwater vulnerability to sea water intrusion in the coastline of the inner Puck Bay using GALDIT method

¹ Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk, Poland
² Physical Oceanography Department, Institute of Oceanology PAS, Powstańców Warszawy 55, 81-712 Sopot, Poland

Contact Information: Dawid Potrykus, Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, 80-233 Gdańsk, ul. Narutowicza 11/12, Poland, Phone: +48 58 3472311 Email: dawpotry@pg.edu.pl

Abstract

In this research, GALDIT method was used to assess seawater intrusion in the coastal aquifer of the inner Puck Bay (Southern Baltic Sea). The impact of potential sea-level rise on groundwater vulnerability for years 2081-2100 was also considered. The study area was categorized into three classes of vulnerability: low, moderate and high. The most vulnerable area is the Hel Peninsula with northern part of the Kashubian Coastland. Increased class of aquifer vulnerability is also adopted to glacial valleys. The results of this research revealed that about 18.9% of the analyzed area is highly vulnerable to seawater intrusion, 25.3% is moderately vulnerable and 55.8% is potentially at low risk. The simulated scenario of predicted sea level rise shows enlargement of high vulnerability areas.