Assessing changes land use in the catchment Tutkabon using RS and GIS

Abstract

Land use change often takes place without principles and environmental restrictions and consequences will follow, such as uncontrolled urban growth, deforestation, destructive floods, erosion and desertification of agricultural. This study was conducted on Tutkabon to define land use change, using GIS and RS, during four periods. Land use maps were prepared in the Arc GIS software based on visual interpretation and digitalization of aerial photographs with scale of 1:55000, in1955, the land use map of 1998 with a scale of 1:50,000, satellite images of Landsat ETM+ in 2002 and IRS-Liss-PAN 2008.The results show, the total area of forest land in1953 was a watershed of approximately66.04 percent to34.73 percent decline in2008, while the extent of irrigated agriculture and garden land use in1953, and0.77 % rise in 2008 to9.60 %. About the area of rangeland, an increase of20% in the area of these lands can be seen from1955 to2008. Changes bare soil also shows an increase13.2 %.The findings of the research indicate that most of the destruction and change land use has occurred in forest. Forest lands are located along Rangeland and farmland rural, when it is often people's livelihood, agriculture and animal husbandry,the most important factor to be considered deforestation. Increasing of livestock grazing and uncontrolled exploitation of vegetation, especially in rangeland, has led to an increase in the bare soil that this happened due to weak implementation of soil conservation practices and grazed the rangeland. Due to land cover changes in this period, the probability of environmental accidents will increase

Keywords

• change land use
• geographical information system
• remote sensing
• satellite images