DOI: 10.1016/j.gloplacha.2013.03.008
论文题名: Hydrochemical evidences: Vulnerability of atoll aquifers in Western Indian Ocean to climate change
作者: Chattopadhyay P.B. ; Singh V.S.
刊名: Global and Planetary Change
ISSN: 0921-8286
出版年: 2013
卷: 106 起始页码: 123
结束页码: 140
语种: 英语
英文关键词: Atoll aquifer
; Climate change
; Hydro-chemical analysis
; Multivariate statistical analysis
; Western Indian Ocean
Scopus关键词: Degree of correlations
; Global sea level rise
; Hydro-chemical analysis
; Intergovernmental panel on climate changes
; Multivariate data analysis
; Multivariate statistical analysis
; Precipitation patterns
; Western indian oceans
; Aquifers
; Chemical analysis
; Geometry
; Groundwater resources
; Hydrochemistry
; Hydrogeology
; Ion exchange
; Lasers
; Rain
; Salt water intrusion
; Sea level
; Shrinkage
; Climate change
; archipelago
; atoll
; boundary condition
; climate change
; coastal aquifer
; correlation
; hydrochemistry
; ice sheet
; Intergovernmental Panel on Climate Change
; ionic composition
; recharge
; saline intrusion
; sea level change
; vulnerability
; water quality
; Andrott
; Antarctica
; Arctic
; Greenland
; India
; Indian Ocean
; Indian Ocean (West)
; Lakshadweep
; Anthozoa
英文摘要: The study evaluates movement of the saltwater interface and ionic composition in the atoll aquifer system in response to natural recharge in Western Indian Ocean (WIO). Sea level rise owing to climate change is expected to have substantial impacts on the world's population living on or near the coast over the next century (Vorosmarty et al., 2000; Milly et al., 2005). Change in sea level is predominantly linked to inundation and saltwater intrusion in coastal aquifers (Döll, 2009). However the change in precipitation pattern as a possible clause for seawater intrusion is poorly established and is due for substantial studies. The Intergovernmental Panel on Climate Change (IPCC) report (2007) that projects the global sea level rise of 18 to 59. cm from 1990 to the 2090s, along with an unspecified amount that could come from changes in the large ice sheets covering Greenland and Antarctica, depicts a relatively much lower regional sea level rise in the WIO. In addition, the report signifies a reduction in annual precipitation rate in this region in agreement with past historical data. This characterizes the WIO region as a potential critical zone under the influence of climate change (i.e. less sea level rise, high reduction in rainfall pattern) unlike most of its neighboring regions. The WIO region is a home to hundreds of coral islands and is inhabited largely. Despite its purported importance, tracing of the aquifer geometry under the influence of climate change has not been reported much. Application of hydro-chemical analysis to delineate the climate change impacts has even been rare. Androth island of Lakshadweep archipelago has been chosen as the study area. The study establishes that hydro-chemical evidences have a high degree of correlation between groundwater aquifer geometry and rate of precipitation. It depicts that decreasing trend in precipitation in the WIO region would result in seawater intrusion and significant shrinkage of aquifer geometry. The study determines the control of precipitation pattern over the aquifer geometry by systematic analyses of hydro-chemical data. The conceptual analyses include surface plots, correlation analysis, ionic exchange and ionic ratio techniques, and multivariate data analyses. The study comprises two precipitation conditions derived from observed field data: (1) rainfall 30% below yearly average and (2) rainfall 30% above yearly average. The result shows shrinkage of around 54.91% from 82.64% (scenario 2) to 27.63% (scenario 2) in good quality water reserves. The study highlights the importance of aquifer boundary conditions in the context of climate change. The analyses clearly indicate that the decreasing trend in rainfall would severely impact the existence of fragile island aquifer systems of the Lakshadweep archipelago. © 2013 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876706127&doi=10.1016%2fj.gloplacha.2013.03.008&partnerID=40&md5=9f5d714a7069159f1002c524e79518b9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11192
Appears in Collections: 全球变化的国际研究计划
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作者单位: Groundwater Division, National Geophysical Research Institute (CSIR), Hyderabad - 500606, India
Recommended Citation:
Chattopadhyay P.B.,Singh V.S.. Hydrochemical evidences: Vulnerability of atoll aquifers in Western Indian Ocean to climate change[J]. Global and Planetary Change,2013-01-01,106.