Soil Conservation and quantification of soil loss is very significant in the present world. Soil erosion is removal and transportation of top soil from the land surface which brought about low harvest yield, cost increment of water treatment, and hindering consequences for oceanic life and natural life territories. The loss of soil from the cultivating land may be reflected in reduced crop production potential, lower surface water quality and damaged drainage networks. Scientists, governments and the general public realized that soil erosion is an important problem in the world. Models are a method for predicting the behaviour of water moving on surface for a number of problems facing society in the past and today. The explanation behind this overview is to rapidly analyze a couple of models on soil erosion on scenes to give information about them to help and serve in a proper path remembering the true objective to discuss particular issues related to hydrology and soil erosion. The results from soil erosion models have been the basic information to land use planning in the catchment, especially to better perceiving how the hydrological cycle, soils and vegetation interface between themselves. In this paper we have discussed three models USLE, ANSWERS, and SWAT. We can use the latest technology models for accurate measurement of soil erosion and deposition.
