Infiltration is an important component of the hydrological cycle where surface runoff and groundwater filling are interconnected. Infiltration rates and infiltration maximum capabilities will be different for soil characteristics and conditions. The watershed code is one of the areas affected by Merapi volcanic ash so that it will affect the infiltration ability of an area. This study aims to assess the comparison of infiltration rates along the watershed area with 2 different methods. In this study, measuring the infiltration rate of the field using the double ring infiltrometer method. The double ring infiltrometer has a height of 500 mm, an inner ring diameter of 300 mm and an outer ring diameter of 450 mm up to 600 mm, made of iron, steel or mixed metal 3 mm thick with a tapered lower end. To analyze the infiltration rate, Horton and Green-Ampt equations were used. The results of this analysis are then mapped with the help of ArcMap software in the form of infiltration methods, namely: Kriging and FAO. Based on the results of the Horton method analysis, the average infiltration value is 18.27 cm / hour and the Green-Ampt model is 10.42 cm / hour. Both models Comparative analysis of Horton and Green-Ampt models are good for estimating infiltration rates because they are very close to field infiltration data