LAND USE/LAND COVER CHANGE DETECTION AND EFFICACY OF ARTIFICIAL RECHARGE STRUCTURES IN VANIYAR SUB BASIN OF THE PONNAIYAR RIVER, SOUTH INDIA USING REMOTE SENSING AND GIS TECHNIQUES

S. Venkateswaran, S.Satheeshkumar, R.Kannan

Abstract: Spatial-temporal changes in land use (LU) and land cover (LC) using remote sensing and GIS buffer analysis techniques were carried out in the Vaniyar sub basin of the Ponnaiyar River in South India. Land uses within buffer distances from Artificial Recharge Structures (ARS) were calculated to quantify the effects of artificial recharge structures. Generally, some land use types were decreased with the increased ARS distances. The objective of this work is to notify the significant changes caused by artificial recharge structures and quantifying land use, land cover changes in the Vaniyar sub basin. Most importantly, the growth of population and domestic product accompanied by the growth in industrial and agricultural activities which led to LULC changes with increased built up land and cropland 20% and decreased water body from 2005 to 2015. Furthermore, the simulated based on results land use scenarios in 2005 and 2015, respectively, for assessing the impact of ARS on LULC change detection analysis were carried out in the sub basin. The results shown that land use pattern changed greatly after ARS construction. Since forest land and cropland are two main types of land use in the study area, the forest land occupied over 35.4% in the study area, during the year 2005-2000, water body had 16 % in the year 1985 and 8% in 2000 decreased. In the major check dam shows that indirect effect within 500 m buffered based on temporal, changing aspects of land use. This interpreted result was derived with the help of satellite data for the periods before and after the construction of artificial recharge structures. Generated land use/cover maps in and around the structures for both pre and post ARS with special reference to vegetation changes. The results reveal that, accompanied by climate change, the LULC changes and human water consumption to be the important factors contributing to the significant changes in the sub basin.

Keywords: Land use, Land cover, Buffer, Check dam, Remote sensing

DOI: https://doi.org/10.15623/ijret.2016.0530002