Abstract
In this paper, we consider recovery of solute concentration and dispersion flux in an inhomogeneous time fractional diffusion equation. We prove that the considered problem is ill-posed, i.e. the solution does not depend continuously on the data. In order to obtain a regularized solution, we propose a truncation regularization method. The convergence estimates are established under some priori bound assumptions for the exact solution. We present three numerical examples to show efficiency of the method.