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Spatio-temporal assessment and trend analysis of surface water salinity in the coastal region of Bangladesh

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Title: Spatio-temporal assessment and trend analysis of surface water salinity in the coastal region of Bangladesh
Authors: Shammi, Mashura Browse this author
Rahman, Md. Mostafizur Browse this author
Islam, Md. Atikul Browse this author
Bodrud-Doza, Md. Browse this author
Zahid, Anwar Browse this author
Akter, Yeasmin Browse this author
Quaiyum, Samia Browse this author
Kurasaki, Masaaki Browse this author →KAKEN DB
Keywords: Seawater intrusion (SWI)
Spatial salinity trend
Nonparametric test
Electric conductivity (EC)
Na/Cl molar ratio
Cl/Br molar ratio
Issue Date: Jun-2017
Publisher: Springer
Journal Title: Environmental science and pollution research
Volume: 24
Issue: 16
Start Page: 14273
End Page: 14290
Publisher DOI: 10.1007/s11356-017-8976-7
PMID: 28421527
Abstract: The study was designed to collect water samples over two seasons-wet-monsoon season (n = 96) (March-April) and dry-monsoon season (n = 44) (September October)-to understand the seasonal variation in anion and cation hydrochemistry of the coastal rivers and estuaries contributing in the spatial trend in salinity. Hydrochemical examination of wet-monsoon season primarily revealed Ca-MgHCO3 type (66%) and followed by Na-Cl type (17.70%) water. In the dry-monsoon season, the scenario reversed with primary water being Na-Cl type (52.27%) followed by Ca-Mg-HCO3 type (31.81%). Analysis of Cl/Br molar ratio vs. Cl (mg/L) depicted sampling area affected by seawater intrusion (SWI). Spatial analysis by ordinary kriging method confirmed approximately 77% sample in the dry-monsoon, and 34% of the wet-monsoon season had shown SWI. The most saline-intruded areas in the wet-monsoon seasons were extreme south-west coastal zone of Bangladesh, lower Meghna River floodplain and Meghna estuarine floodplain and southeastern part of Chittagong coastal plains containing the districts of Chittagong and Cox's Bazar adjacent to Bay of Bengal. In addition, mid-south zone is also affected slightly in the dry-monsoon season. From the analyses of data, this study could further help to comprehend seasonal trends in the hydrochemistry and water quality of the coastal and estuarine rivers. In addition, it can help policy makers to obligate some important implications for the future initiatives taken for the management of land, water, fishery, agriculture and environment of coastal rivers and estuaries of Bangladesh.
Rights: The final publication is available at Springer via
Type: article (author version)
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藏崎 正明

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