Control Of Salt Water Intrusion Due To Sea Level
Rise In The Coastal Zone Of Bangladesh
Author(s)
M. J. A. N. Bhuiyan & D. Dutta
Abstract
One potential impact of a global warming and rise in sea level would be an
increase in the salinity of coastal zones, which would potentially threaten
drinking water and aquatic ecosystems. There is a need to be better prepared to
respond and adapt to these changes. This report examines the potential impacts
of accelerated sea level rise on salinity in the South West region of Bangladesh.
The study aims at determining the sensitivity of river salinity to upstream
discharge and downstream sea level. To do that, the minimum upstream flow
will be determined to protect the salinity intrusion from sea level rise. A one
dimensional river salinity transport model has been developed and coupled with
an existing surface and river flow model. The model has been proved to be
robust with calibration and verification against observed data. The model outputs
indicate a significant change of river salinity in the coastal zone. The results also
indicate that a considerable advance in seawater intrusion can be expected in the
coastal aquifer if current rates of sea level rise continue. The topography of the
area is flat and gently sloping towards the Bay of Bengal. The consequences of
salinity intrusion in the coastal area especially in the South West region of
Bangladesh would be significant on many sectors like land fertility, agriculture,
availability of fresh water, existence of the Sundarban forest etc. Pond culture in
the coastal area will be affected by intrusion of salt water into ponds, unless
embankments are made around them. Shrimp culture in the coastal area is a
lucrative business. Increase in salinity is likely to jeopardize the shrimp culture.
Keywords: flow, river, salinity, salt water intrusion, sea level rise.
Keywords
flow, river, salinity, salt water intrusion, sea level rise
Related Book
Other papers in this volume
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