ABSTRACT Rainfall is one of the important parameters in water resources planning and management. This study aims to model rainfall in Siak District using Neyman-Scott Rectangular Pulse modeling (NSRP). NSRP forecasting is used to generate low-timescale rainfall data. The results of NSRP modeling carried out Mean Absolute Error (MAE) testing get a value of 0.051 mm which is close to zero. This …