Design of containment facilities for runoff from windrow compost pads lacks suitable runoff prediction models for the unique surface consisting of gravel overlying compacted sub-soil material. Models used were the curve number, a commercially available numerical computer model (HYDRUS 2-d), and a compartmental model developed on the Matlab-Simulink platform based on rainfall-runoff data. The curve number model was based oninfiltration, antecedent rainfall, and the percentage of pad coverage and led to a predictedvs. observed collection pond volume with a Percent Root Mean Squared Error (% RMSE)of 0.61 % compared to maximum pond volume. The prediction was relatively insensitiveto deviation from the literature recommended value of 75. HYDRUS 2D applied verticaland lateral flow aspects to infiltration, storage, and subsurface transport, improving pondvolume prediction with an %RMSE = 0.65 %. The Compartmental Model separately estimated outputs for infiltration, lateral seepage, and overland flow with an % RMSE = 0.76%. Information from the compartment model can be used to develop an instantaneous unithydrograph of compost pads and future applications for porous pavements.