Assessment of Seawater Intrusion in Coastal Aquifers of Puri District, Odisha
579 / 197
Authors
-
Kiranbala Behura
Swami Vivekanand College of Agricultural Engineering and Technology andResearch Station, Indira Gandhi Krishi Vishwavidyalaya, Raipur-492 012, Chhattisgarh, India
-
Sheelabhadra Mohanty
ICAR-Indian Institute of Water Management, Bhubaneswar-751 023, Odisha, India
-
Mahendra Prasad Tripathi
Swami Vivekanand College of Agricultural Engineering and Technology and Research Station, Indira Gandhi Krishi Vishwavidyalaya, Raipur-492 012, Chhattisgarh, India
-
Subhankar Ghosh
3 AgFE Department, Indian Institute of Technology Kharagpur, Kharagpur-721 302, West Bengal, India
-
Partha Pratim Adhikary
ICAR-Indian Institute of Water Management, Bhubaneswar-751 023, Odisha, India
Keywords:
Seawater intrusion, GALDIT, Coastal aquifers, Map removal sensitivity analysisAbstract
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. The study area covers the coastal tract of Puri district covering part of 5 different blocks. 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-+CO32-] 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 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.
Downloads
References
Agarwadkar YY (2005) Salinity mapping in coastal area using GIS and remote sensing. ITC, Enschede.
Aller L, Bennett T, Lehr J, Petty RJ and Hackett G (1987) DRASTIC: A Standardized System for Evaluating Ground Water Pollution Potential Using Hydrogeologic Settings. US Environmental Protection Agency. Washington, DC, p455.
Brehme M, Scheytt T, Celik M and Dokuz UE (2011) Hydrochemicalcharacterisation of ground and surface water at Dörtyol/Hatay/Turkey. Environmental Earth Sciences 63(6): 1395-1408.
Chachadi AG and Lobo-Ferreira JP (2001) Sea water intrusion vulnerability mapping of aquifers using GALDIT method. Coastin 4:7-9.
CGWB (2018). Aquifer mapping and management of ground water resources, Puri District, Odiaha.
CGWB (2021). Ground Water Year Book 2020-2021, South Eastern Region ,Bhubaneswar.
Lobo-Ferreira JP, Chachadi AG, Catarina D, Diamantino C and Henriques M J (2005) Assessing aquifer vulnerability to seawater intrusion using GALDIT method: Part 1. In: IAHS and LNEC proceedings of the fourth interceltic colloquium on hydrology and management of water resources, Portugal.
Lobo-Ferreira JP and Chachadi AG (2005) Assessing aquifer vulnerability to seawater intrusion using GALDIT method: part 2. In: IAHS and LNEC proceedings of the fourth interceltic colloquium on hydrology and management of water resources, Portugal
Mádl-Szőnyi J and Füle L (1998) Groundwater vulnerability assessment of the SW Trans-Danubian central range, Hungary. Environmental Geology 35(1): 9-18.
Mirzavand M, Ghasemieh H, Sadatinejad SJ, Bagheri R and Clark ID (2018) Saltwater intrusion vulnerability assessment using AHP-GALDIT model in Kashan plain aquifer as critical aquifer in a semi-arid region. Desert 23(2): 255-264.
Reshma R and Sindhu G (2019) Assessment of groundwater vulnerability to contamination: a case study. Environ. Monit. Assess 191(6): 1-22.
Santha Sophiya M and Syed TH (2013) Assessment of vulnerability to seawater intrusion and potential remediation measures for coastal aquifers: a case study from eastern India. Environmental Earth Sciences 70(3): 1197-1209.
Sherif, M. M. and Hamza, K. I., (2001). Mitigation of seawater intrusion by pumping brackish water. Transport in Porous Media 43(1): 29-44.
Sujitha V, Purandara BK, Shivapur AV and Davithuraj J (2020) Assessment of aquifer vulnerability using GALDIT model—a case study. J. Geol. Soc. India 95(5): 507-512.
Trabelsi N, Triki I, Hentati I and Zairi M (2016) Aquifer vulnerability and seawater intrusion risk using GALDIT, GQISWI and GIS: case of a coastal aquifer in Tunisia. Environ. Earth Sci. 75(8): 1-19.
Downloads
Submitted
Published
Issue
Section
License
Journal of Soil Salinity and Water Quality serves as an official organ of the Indian Society of Soil Salinity and Water Quality (ISSSWQ) for the publication of research papers, reviews, and short communications as per the constitution and by-laws of the society. Soft and hard copy of the journal are sent free to all its members. All disputes are subject to the exclusive jurisdiction of competent court and forums in Kamal only. The society does not assume any responsibility for opinion by the authors in the articles and no-material in any form can be reproduced without the prior permission of the society. The society is not responsible for any delay, whatsoever, in publication/ delivery of the periodicals to the subscribers due to unforeseen circumstances or postal delay. The society does not vouch for any claims made by the advertisers of products and services. The publisher and the editors shall not be held liable for any consequences in the event of such claim not being honoured by the advertisers.
