STUDY ON THE RELATIONSHIP BETWEEN VEGETATION COVER AND SOIL EROSION BY USING REMOTE SENSING

Stable management of natural resources as a national capital requires comprehensive knowledge of existing relations in nature such as the relationship between vegetation cover and soil. The acquisition of knowledge and information on the relationship between vegetation cover and its health is highly important for soil management. The examination of vegetation cover, whether locally or globally depends on field data while its usually hard to access such data. Besides, conventional method of vegetation cover estimate, which includes general estimate of vegetation cover, is not only time-consuming but also isn`t informative. Results confirmed by field observation and land facts show that the general precision of images from landset 8 was acceptable (the general precisions for the years 2000 and 2013 were 0.89 and 0.88 respectively). Thus, remote sensing is a very useful technology which is a preferred method because of its special features such as providing a wide and unified view of an area, recursion, accessible data, high precision of resulting information and time saving. In the present article, vegetation cover map is drawn using remote sensing technology and NDVI index. After comparing this map with basin erosibility map, it was found out that in areas with decreased vegetation, there is increased erosion. This further indicates that there`s a positive and direct relationship between vegetation cover and local erosion.