DOI: 10.1007/s11069-020-03961-6
论文题名: Eroding islands of Gulf of Mannar, Southeast India: a consequence of long-term impact of coral mining and climate change
作者: Asir N.G.G. ; Kumar P.D. ; Arasamuthu A. ; Mathews G. ; Raj K.D. ; Kumar T.K.A. ; Bilgi D.S. ; Edward J.K.P.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 103, 期: 1 起始页码: 103
结束页码: 119
语种: 英语
中文关键词: Coral mining
; Gulf of Mannar
; Island dynamics
; Low-lying reef islands
; Shoreline morphology
; Vulnerability
英文关键词: anthropogenic effect
; climate change
; coastal erosion
; coastal morphology
; coral
; field survey
; island
; Gulf of Mannar
; Indian Ocean
; Anthozoa
英文摘要: A study was undertaken to assess the morphological variations during the period 1969–2018 in the twenty-one islands in Gulf of Mannar, southeast India, using Survey of India Toposheet, Google Earth images and field survey techniques. The results show that two of the islands have eroded and submerged, fifteen islands area cover has reduced and four have their area expanded during the last 49 years. Overall, the Tuticorin group of islands has experienced the highest percentage of land cover reduction (78.55%), followed by Keelakarai (43.49%), Vembar (36.21%) and Mandapam (21.84%) groups. The exceptions are the four islands of the Mandapam group viz. Hare, Manoli, Krusadai and Shingle, whose area covers have increased (16.44%). A small change in the area of an island induces a greater change in its morphology. From the Island Change Ratio plot, it is observed that islands with an area cover of 10–30 ha have suffered loss of more area cover and undergone mobility from the core area. The constant changes undergone and the mobility exhibited by these islands clearly indicate that they are dynamic. The main factors that are responsible for the current changes in their extent and position are coral mining and sea level rise. Thus, it is clear that the low-lying reef islands of Gulf of Mannar are very dynamic, and that their expansion, loss in area cover and mobility are mainly controlled by coral mining and climate change. Immediate conservation action is necessary to prevent the islands from submergence. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168387
Appears in Collections: 气候变化与战略
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作者单位: Suganthi Devadason Marine Research Institute, 44-Beach Road, Tuticorin, 628 001, India; Gulf of Mannar Marine National Park, Ramanathapuram, 623 503, India; Hosur forest Division, Mathigiri Post, Hosur, 635 110, India
Recommended Citation:
Asir N.G.G.,Kumar P.D.,Arasamuthu A.,et al. Eroding islands of Gulf of Mannar, Southeast India: a consequence of long-term impact of coral mining and climate change[J]. Natural Hazards,2020-01-01,103(1)