{"title":"Geomorphological change assessment of south western coastal region: a case study of Mongla Upazila, Bagerhat, Bangladesh","authors":"M. Hasan, S. Karmaker, M. R. Rahman","doi":"10.1080/23249676.2020.1831977","DOIUrl":null,"url":null,"abstract":"Erosion and shoreline changes are found at a higher rate in the southwestern coastal area due to its dynamic characteristics. The present study aims to evaluate the geomorphological changes through observations of satellite imagery in Mongla, Bagerhat. Study conducted from the years of 2000–2018 using the Normalized Difference Water Index (NDWI) and image classification method in ArcGIS software. According to the analysis of multispectral satellite imagery, it is revealed that about 22.57 km2 land area eroded consecutively over the last 18 years as well as the areal difference of land and water measured. Changes of shorelines figure out that in some vulnerable cross-sections about 366 m area is displacement. Though, this area located in the tidal zone but ocean connected areas of Sunderbans and lower regions of the populated area faced mostly the effect of geomorphological changes.","PeriodicalId":51911,"journal":{"name":"Journal of Applied Water Engineering and Research","volume":"9 1","pages":"45 - 51"},"PeriodicalIF":1.4000,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/23249676.2020.1831977","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Applied Water Engineering and Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/23249676.2020.1831977","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"WATER RESOURCES","Score":null,"Total":0}
引用次数: 4
Abstract
Erosion and shoreline changes are found at a higher rate in the southwestern coastal area due to its dynamic characteristics. The present study aims to evaluate the geomorphological changes through observations of satellite imagery in Mongla, Bagerhat. Study conducted from the years of 2000–2018 using the Normalized Difference Water Index (NDWI) and image classification method in ArcGIS software. According to the analysis of multispectral satellite imagery, it is revealed that about 22.57 km2 land area eroded consecutively over the last 18 years as well as the areal difference of land and water measured. Changes of shorelines figure out that in some vulnerable cross-sections about 366 m area is displacement. Though, this area located in the tidal zone but ocean connected areas of Sunderbans and lower regions of the populated area faced mostly the effect of geomorphological changes.
期刊介绍:
JAWER’s paradigm-changing (online only) articles provide directly applicable solutions to water engineering problems within the whole hydrosphere (rivers, lakes groundwater, estuaries, coastal and marine waters) covering areas such as: integrated water resources management and catchment hydraulics hydraulic machinery and structures hydraulics applied to water supply, treatment and drainage systems (including outfalls) water quality, security and governance in an engineering context environmental monitoring maritime hydraulics ecohydraulics flood risk modelling and management water related hazards desalination and re-use.