Scattering properties of solitary waves of  4 model, on potentials are investigated. Soliton-potential scattering is studied with three different models. In model 1 we have added the potential through a suitable metric for the background space-time. A better approximation is presented in model 2. The second model is a new one and we will show that it has better behaviour. In the third model, the potential is added to the equation of motion by changing one of the parameters of the solitary wave. The obstructions are characterized by a potential which has a non-zero value in certain region of space and zero elsewhere. Our results are based on numerical simulations and analytical considerations.

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