Abstract

Soil erosion has become a global environmental problem due to it’s severe effects on the ecological environment, soil productivity and crop yield. Protection of soil from erosion is one of the requirements for soil management, especially in tropical and subtropical areas where there is a deeply terrain slope, concentrated rainfall and actual vegetation. The quantitative assessment of soil loss amount and soil erosion hazard map, as well as the direct and indirect effects of erosion on the landscape and ecological environment at diffe- rent scales, is essential. Currently, there are many models of soil erosion assessment developed in the world-wide. Along with the rapid development of information technology and GIS technology, simulation of transport processes, deposition of eroded materials, and valuation of soil loss over time and space could be done easily with highly accuracy. This paper presents the result of quantitative assessment of soil loss and soil erosion mapping in Gia Lai province using the Universal Soil Loss Equation (USLE) along with association of GIS techniques.