Many factors affect the slope stability such as rainfall infiltration. The rainfall infiltration will increase the weight of soil, pore water pressure and reduce the shear strength. When the water flow through the slip surface, it will cause slope movement. This paper studies the slope movement in Kalibawang irrigation channel km. 15+900 which induces a failure of Kalibawang irrigation channel and other surrounding structures. The slope movement is modeled as coupled stresspore water pressure analysis using SIGMA/W. Topography data, shear strength, and hydraulic parameter were applied as the input parameter. The rainfall data was collected from TRMM starting from 1 July to 30 August 2017. The pore water pressure on the slope was decreased. The pore water pressure in 14 m depth on 1 July (beginning of model) is 51.2 kPa and on 30 August (end of modeling) is 10.5 kPa. Based on the model, the deformation increased during modeling, but the deformation rate decreased over time. The deformation at the end of modeling (August, 30) is 1.9 mm at BH7.