Spatio-temporal changes associated with natural and anthropogenic factors in wetlands of Great Rann of Kachchh, India

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• 作者：C. Sudhakar Reddy ; S. Vazeed Pasha ; C. S. Jha
• 关键词：Spatial ; Remote Sensing ; GIS ; Temporal Change ; Natural ; Anthropogenic ; Wetlands ; Kachchh
• 刊名：Journal of Coastal Conservation
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：20
• 期：2
• 页码：145-155
• 全文大小：1,867 KB
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• 作者单位：C. Sudhakar Reddy (1)
  S. Vazeed Pasha (1)
  C. S. Jha (1)
  
  1. Forestry & Ecology Group, National Remote Sensing Centre, ISRO, Balanagar, Hyderabad, 500 037, India
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Nature Conservation
  
• 出版者：Springer Netherlands
• ISSN：1874-7841

文摘

Studies about wetlands have been identified as a key component of environmental change. The present study assesses the spatio-temporal changes in the wetlands of the Great Rann of Kachchh, in the Kachchh Biosphere Reserve, India, using remote sensing and GIS techniques. Satellite time-series data from Landsat (1977, 1990 and 1999) and IRS P6 (2006, 2008–2012) were used. The Normalised Difference Water Index (NDWI) was derived for each year and the layers were manually edited to obtain a high classification accuracy. The analysis found that the area has undergone considerable change from 1977 to 2011. The natural wetland area of 30.6 km2 was converted to salt pans. An area of about 255 km2 (41.6 %) of natural grassland was invaded by Prosopis juliflora, which raises further conservation concerns and emphasises the importance of having intervention plans to manage this ecosystem. The highest water spread of 1171 km2 was observed in September 2011, followed by 2010, 2009 and 2008 in the same month. The present study is useful in planning the long-term management and conservation of the Great Rann of Kachchh wetland.