PJB-2018-183
Appraisal of Land Cover Changes At The Upper Sindh Through Geo-Informatic Techniques
Dr. Zia ur Rehman
Abstract
Satellite remote sensing is a useful technique to observe environmental changes which are introduced as a result of man-made activities and physical phenomenon. The objective of the study is to analyze the land cover pattern on pre-flood period, flood period and post flood period of 2015 on upper part of Sindh region, and to observe the Land Surface Temperature (LST) and Normalized Difference Vegetation Index (NDVI) during study period. Three satellite images of Landsat-8 OLI / TIRS were used in the study acquired on April 11, 2015, August 17, 2015 and October 20, 2015. The land cover classes are identify for the study area are Healthy Vegetation, Normal Vegetation, Wet Soil, Dry Soil and Water. Three techniques are used to maximized likelihood supervised classification, land surface temperature (LST) and normalized difference vegetation index (NDVI). The result indicates that land cover classes and socio-economic of the study area is under the dangerous threat of climate change especially flood. In flood period many socio-economic, land use/land cover changes especially water, vegetation land, animal, house damages/destroyed. The flood comes approximately every year in the study area.The mean LST of pre-flood period was 30.5 C , during flood period was 37 C and post flood was 32 C.
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