Wetland Monitoring,Serving as an Index of Land Use Change-A Study in Samaspur Wetlands,Uttar Pradesh,India |
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| Authors: | M D Behera V S Chitale A Shaw P S Roy M S R Murthy |
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| Institution: | 1.Indian Institute of Technology,CORAL,Kharagpur,India;2.Indian Institute of Remote Sensing,ISRO,Dehradun,India;3.National Remote Sensing Centre,ISRO,Hyderabad,India |
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| Abstract: | Wetlands are among the most productive ecosystems in the world and any alterations might lead to changes in their bio-physical,
socio-economic and climatic conditions. Wetland dynamics as an index of land use change were studied. Satellite remote sensing
was utilized to understand the periodic and seasonal dynamics of Samaspur wetlands using Landsat and RESOURCESAT-1 temporal
data. Index-based (i.e., Normalized Difference Water Index (NDWI) and Normalized Difference Vegetation Index (NDVI)) classification
resulted in meaningful discrimination of wetland classes. Results indicate (i) effective water spread areas have increased
to optimum capacity at 1990 due to the influence of Sharda canal, (ii) expansion of the agricultural area has led to reduction of the wetland buffer area, and (iii) increase in vegetation
biomass due to pesticide-fertilizer runoff and sedimentation load. We also reiterate (i) free availability of the Landsat
satellite data in public domain facilitating such monitoring studies and (ii) availability and utility of SWIR band information
in wetland classification exercise. The study concludes that policy-driven measures have both long and short term impacts
on land use and its natural wetland ecosystems; and the characterizing the later serves as indictor of the former and perhaps
vice versa. |
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