Geospatial Assessment of shoreline changes and Impacts of Seawater Intrusion on Groundwater Quality of Coastal Aquifers of the Kannur Coast, Kerala

Geospatial Assessment of shoreline changes and Impacts of Seawater Intrusion on Groundwater Quality of Coastal Aquifers of the Kannur Coast, Kerala | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Geospatial Assessment of shoreline changes and Impacts of Seawater Intrusion on Groundwater Quality of Coastal Aquifers of the Kannur Coast, Kerala T K Prasad, Sreerama Naik S R, Sandeep A S, Balakrishnan P, Jayapal G This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7381205/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract One of the landforms in coastal areas that is changing the fastest is the shoreline. They are the most important component of the coastline. GIS provides the most detailed information on the dynamics of coastal landforms. Thus, it is crucial to accurately detect shorelines and regularly monitor them to understand the dynamics of various coastal features and processes. This study focuses on the shoreline changes and seawater intrusion in Kannur district, Kerala, India, utilizing multi-temporal Landsat satellite imagery and the Digital Shoreline Analysis System (DSAS). The analysis spans septennial years (Every 7 Years) for two decades’ shoreline changes from 2002 to 2023. The findings indicate that approximately 52.15% of Kannur's coastline has experienced erosion and 47.85% accretion. Over the past 20 years, the net shoreline movement shows a slight erosional trend, with a total change of -8.81 meters, averaging 0.43 meters per year. The study identifies the northern areas of Kannur, particularly Payyanur and Pazhayangadi, as highly vulnerable to erosion, while southern areas exhibit minor accretion. The study highlights the importance of integrating remote sensing and GIS technologies in shoreline studies, offering a cost-effective and efficient means of monitoring large coastal areas. The insights from this study provide valuable data for coastal zone management and infrastructure planning, particularly in addressing the risks associated with coastal erosion and the need for sustainable development in vulnerable coastal regions like Kannur. The results can serve as a foundation for developing targeted shoreline management strategies to mitigate future environmental and socio-economic impacts. Sea-level rise seawater intrusion coastal aquifers Geospatial Technologies DSAS Erosion and Accretion Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7381205","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":530182626,"identity":"98580004-8d75-4140-b8ba-93771c90d097","order_by":0,"name":"T K Prasad","email":"","orcid":"","institution":"Kannur University","correspondingAuthor":false,"prefix":"","firstName":"T","middleName":"K","lastName":"Prasad","suffix":""},{"id":530182627,"identity":"1a3d0479-ca16-40c4-bb4d-27c422102dae","order_by":1,"name":"Sreerama Naik S 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Kerala\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Sea-level rise, seawater intrusion, coastal aquifers, Geospatial Technologies, DSAS, Erosion, and Accretion","lastPublishedDoi":"10.21203/rs.3.rs-7381205/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7381205/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eOne of the landforms in coastal areas that is changing the fastest is the shoreline. They are the most important component of the coastline. GIS provides the most detailed information on the dynamics of coastal landforms. Thus, it is crucial to accurately detect shorelines and regularly monitor them to understand the dynamics of various coastal features and processes. This study focuses on the shoreline changes and seawater intrusion in Kannur district, Kerala, India, utilizing multi-temporal Landsat satellite imagery and the Digital Shoreline Analysis System (DSAS). The analysis spans septennial years (Every 7 Years) for two decades\u0026rsquo; shoreline changes from 2002 to 2023. The findings indicate that approximately 52.15% of Kannur's coastline has experienced erosion and 47.85% accretion. Over the past 20 years, the net shoreline movement shows a slight erosional trend, with a total change of -8.81 meters, averaging 0.43 meters per year.\u003c/p\u003e\u003cp\u003eThe study identifies the northern areas of Kannur, particularly Payyanur and Pazhayangadi, as highly vulnerable to erosion, while southern areas exhibit minor accretion. The study highlights the importance of integrating remote sensing and GIS technologies in shoreline studies, offering a cost-effective and efficient means of monitoring large coastal areas. The insights from this study provide valuable data for coastal zone management and infrastructure planning, particularly in addressing the risks associated with coastal erosion and the need for sustainable development in vulnerable coastal regions like Kannur. The results can serve as a foundation for developing targeted shoreline management strategies to mitigate future environmental and socio-economic impacts.\u003c/p\u003e","manuscriptTitle":"Geospatial Assessment of shoreline changes and Impacts of Seawater Intrusion on Groundwater Quality of Coastal Aquifers of the Kannur Coast, Kerala","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-10-16 15:03:14","doi":"10.21203/rs.3.rs-7381205/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"cc9ed43c-1599-41c7-ba94-846bbba9e9a2","owner":[],"postedDate":"October 16th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2025-10-16T15:03:14+00:00","versionOfRecord":[],"versionCreatedAt":"2025-10-16 15:03:14","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7381205","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7381205","identity":"rs-7381205","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}