Areal Extent of Erosion and Accretion in and around the Gahirmatha Coast, NW of Bay of Bengal by Remote Sensing and GIS Analysis of Multi-Temporal Satellite Imagery
Areal Extent of Erosion and Accretion in and around the Gahirmatha Coast, NW of Bay of Bengal by Remote Sensing and GIS Analysis of Multi-Temporal Satellite Imagery作者机构：P.I SYS-SERC Department of Science & Technology New Delhi India Department of Geology Andhra University Waltair India Department of Geography Andhra University Waltair India National Remote Sensing Agency Department of Space ISRO Hyderabad India
出 版 物：《International Journal of Geosciences》 (地球科学国际期刊（英文）)
年 卷 期：2015年第6卷第7期
页 面：705-719页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Accretion Erosion Morphology Coast Temporal Satellite Data
摘 要：The shoreline morphology change due to erosion and deposition is a major concern for coastal zone management. In the present study, a highly dynamic coast of Gahirmatha on Bay of Bengal? in northeast India is experiencing active erosion, which is mainly wave and tide erosion related hazard threat ending human habitation and sustainability of the coast. In our study, high resolution satellite imagery of time series provided detailed sequence of coastal morphology and their changes in all respects. Comparison study of relative shoreline positions on time series satellite data spanning?three decades from 1973 to 2004 covering for the years of 1973, 1983, 1987, 1990, 1998, 2000 and 2004, provided regional changes with accelerated erosion and accretion. The result of the studies?have revealed that the areas of severe erosion found along the coast are confined to the promontories of the present day mouths itself of the Baitrani at Dhamra and Brahmani at Maipura inlets. In this background, it is significant to understand the magnitude of factors that are responsible for prograding or retrograding of coast. The present study is an attempt in this direction.
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