{"title":"A study on coastal attrition of Dakshina Kannada district using remote sensing and GIS.","authors":"Sunit Lawoo Charatkar, K V Radhakrishnan","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>Mangalore is one of the important coastal towns in Dakshina Kannada along the west coast of India situated at the mouth of Nethravathi-Gurpur estuary. The remote sensing and GIS (Geographical Information System) is a powerful tool to monitor coastal changes by continuous observation. A study has been carried out on the shoreline changes and coastal processes operating in the Dakshina Kannada coast using remote sensing and GIS technique. Survey of India topographical map of 1967 and IRS 1B, LISS II 1993 imagery (Geocoded) both on the scale of 1:50000 has been analysed to elucidate and quantify erosion and accretion in the study area. Erosion is observed at southern spit (Ullal) upto Talapadi and also northern spit (Bengre) upto New Mangalore Port. Accretion is observed at north of New Mangalore Port. Gradual shifting of the estuarine mouth of Nethravathi-Gurpur to the north is also observed. The changes could be attributed to human interference by way of constructing coastal structures.</p>","PeriodicalId":84892,"journal":{"name":"Indian journal of environmental health","volume":"44 4","pages":"270-81"},"PeriodicalIF":0.0000,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Indian journal of environmental health","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Mangalore is one of the important coastal towns in Dakshina Kannada along the west coast of India situated at the mouth of Nethravathi-Gurpur estuary. The remote sensing and GIS (Geographical Information System) is a powerful tool to monitor coastal changes by continuous observation. A study has been carried out on the shoreline changes and coastal processes operating in the Dakshina Kannada coast using remote sensing and GIS technique. Survey of India topographical map of 1967 and IRS 1B, LISS II 1993 imagery (Geocoded) both on the scale of 1:50000 has been analysed to elucidate and quantify erosion and accretion in the study area. Erosion is observed at southern spit (Ullal) upto Talapadi and also northern spit (Bengre) upto New Mangalore Port. Accretion is observed at north of New Mangalore Port. Gradual shifting of the estuarine mouth of Nethravathi-Gurpur to the north is also observed. The changes could be attributed to human interference by way of constructing coastal structures.
芒格洛尔是印度西海岸达克希纳邦重要的沿海城镇之一，位于Nethravathi-Gurpur河口。遥感和地理信息系统(GIS)是通过连续观测监测海岸变化的有力工具。利用遥感和地理信息系统技术对达克什纳-卡纳达海岸的海岸线变化和海岸过程进行了研究。分析了1967年印度调查地形图和IRS 1B、LISS II 1993年1:5万比例尺的图像(地理编码)，以阐明和量化研究区域的侵蚀和增生。在南部沙咀(Ullal)至塔拉帕迪和北部沙咀(Bengre)至新芒格洛尔港均观察到侵蚀。在新芒格洛尔港北部观测到增生。Nethravathi-Gurpur河口也逐渐向北移动。这些变化可归因于人类通过建造海岸结构而进行的干扰。
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