River levees occasionally breach during flooding in the mechanics of backward erosion piping and its impact is enormous. There is a critical need to develop a model to predict hydraulic gradient that cause backward erosion piping under river levee and a method to detect the piping in the field. This paper presents the results of 1g and centrifuge tests on backward erosion piping to facilitate better understanding the mechanism of sand transportation in the pipe. The 3D profile of the pile and flow rate of water in the pipe are observed using innovative testing techniques. A method to predict the hydraulic gradient is proposed. Next, there is a strong need for non-destructive techniques that can identify progression of the piping, and a practical piping detection method is developed in this study. Current inspection methods to river levees cannot detect the backward erosion piping until it manifests at the exterior surface. The developed method in this study, is capable of evaluating the length and location of the pipes based on deformation of levee slopes detected by UAV and Satellite. Centrifuge tests are conducted to confirm evolution of surface deformation as piping progressed.