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Assessment of Seawater Intrusion in Coastal Aquifers of Puri District, Odisha

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Title Assessment of Seawater Intrusion in Coastal Aquifers of Puri District, Odisha
Not Available
 
Creator K Behura
S Mohanty
MP Tripathi
S Ghosh
PP Adhikary
 
Subject Seawater intrusion, GALDIT, Coastal aquifers, Map removal sensitivity analysis
 
Description Research article
Seawater intrusion is one of the major threats in coastal areas and subsequently a major concern for the
groundwater resource management. Effective planning and management is required for mitigation of this
problem in coastal aquifers. The present research is aimed to identify the spatial distribution of seawater intrusion
in the coastal aquifers of Puri District in the state of Odisha. In the present study, the vulnerability of aquifers
to saltwater intrusion was assessed by GALDIT, an index-based method. To quantify the spatial extent of
susceptibility of coastal intrusion, six hydro-geological characteristics were considered in the model such as G:
Aquifer type (confined, unconfined & semi-confined), A: Conductivity of aquifer, L: Level of groundwater
above MSL, D: Perpendicular distance from the shoreline, I: Cl-
/HCO3
-+CO3
2- ratio representing existing
effect of the intrusion of saline water and T: Saturated thickness of aquifer. Different weights and ratings were
assigned to these layers according to the model and overlay analysis of the layers was done for mapping the
seawater intrusion vulnerability map. For the pre-monsoon, susceptibility zones are categorized as low, moderate,
and high, with percentages of 75.12 %, 22.84 %, and 2.034 %, respectively. Similarly, for the post-monsoon
season, 78.07 %, 21.08 %, and 0.84%, area are categorized under low, moderate and high susceptible zones.
The Gop block was found to be the most susceptible area out of the 5 studied blocks. Statistical analysis such as
map removal sensitivity analysis showed that the level of groundwater above MSL and perpendicular distance
from the shoreline are the most sensitive parameters and thickness of aquifer is the least sensitive parameter for
groundwater contamination in the study area. Such modeling studies can help in planning and managing
activities for sustainable groundwater resource management
Indian Society of Soil Salinity and Water Quality, Karnal (Additional financial support from Indian Council of Agricultural Research for journal printing, and Members of the Society)
 
Date 2024-11-01T06:44:57Z
2024-11-01T06:44:57Z
2022-11-30
 
Type Article
 
Identifier Not Available
0976-0806
http://krishi.icar.gov.in/jspui/handle/123456789/84259
 
Language English
 
Relation Not Available;
 
Publisher Indian Society of Soil Salinity and Water Quality,CSSRI, Karnal