Influence of Shirur dam on land use/land cover pattern in Markandeya river basin, Karnataka

  • Dafiya. D. Badami aDepartment of Geology, School of Earth Sciences, Central University of Karnataka, Gulbarga, Karnataka-585367
Keywords: : Landsat data, geospatial tools, supervised classification, land use/land cover

Abstract

A land cover change study constitutes an important aspect of temporal change which is an efficient way of analyzing the change over a large scale. The present study examined the land cover changes that have occurred in the Markandeya river basin between 1996 and 2016. Supervised classification technique was followed by using the Maximum Likelihood Classification algorithm for this purpose. In total, eight land use classes were identified in this basin, using a Level II Classification scheme. The LULC changes using the multitemporal Landsat dataset from 1996 to 2016 (i.e. Landsat TM 5 for 1996, Landsat-7 ETM for 2000, Landsat-7 ETM for 2007 and 2011, and Landsat-8 OLI for 2016) were generated and mapped to calculate the change in areas of different land use categories. LULC change analysis was aimed to assess the impact of new water bodies on LULC pattern of the basin. Significant changes in the LULC pattern with respect to the emergence of new water bodies, especially the Shirur dam was observed. The most dominating feature in the basin was open scrubland followed by cropland. However, it was observed that both cropland and built-up areas were increased in the basin due course of time. The observed trend is also suggestive of the condition that the land use undergoes an intermediate transition to a fallow land phase, before finally transforming into either agriculture or built-up land. Though the construction of Shirur dam resulted into submergence of agriculture land and dislocation of villages initially, it was observed that agricultural land and built-up land were increased around the dam

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Published
2018-12-27
Section
Articles