The Concept of a Zero Runoff System (ZROS) in reducing the volume of rainwater runoff using infiltration wells at the Syiah Kuala University

High rainfall with a very high intensity can cause inundation. The purpose of this study was to determine the magnitude designed flood discharge that occurred, and number infiltration wells needed reduce rainwater runoff. This research uses data maximum 10 years daily for observation. results showed 5 return period 47.24 mm/hr resulting in design 2.27 m3/second. average well water level is 5.08 cm an soil permeability value 5.03 cm/hour. Infiltration are depth 1.5 m diameter 1.4 m. use calculated based on 2 types, type 1 (lined walls) (non-lined each roof class. total area covering 15.38 ha requires ± 2.678 wells, or ±2.440 which runoff by 17% (type 1) 30% 2) Syiah Kuala University.