Approximate Solution Method for a Hydrodynamical Wave Problems by Parameter Differentiation

A parameter differentiation solution method is proposed for approximately solving a perturbed hydrodynamics wave problem. From the approximate solution obtained by this method, the contribution of the perturbed term in the governing equation can be seen clearly. As application, the method is applied to some well-Known Perturbed Problems relatod to KdV equations frequently met with in fluid mechanics, atmospheric science and space Physics.