Abstract:
Study area is the Puttalam lagoon area, which is situated in the
northwestern region of Republic of Sri Lanka. The study area groundwater exploring
from Quaternary and Miocene aquifers and the centerline water intakes are not
available. Three types of favorable saline intrusion aquifer systems were identified in
the study area. Analyzing the forming of seawater intrusion to water intakes with the
pumping and without pumping, considering different densities of salt water, on the
basis of analytical solutions. Using the analytical method determine the length of
salt water "lens" considering different values of saline and fresh water density. The
calculations Indicate, for the definite groundwater gradients being polluted due to
sea water intrusion. The analytical solutions can be used for forecasting the seawater
Intrusion in the coastal aquifer areas if correct hydrogeological information being
available.
