Abstract
The runoff analysis for urban storm water can be divided broadly into two categories; the storage analysis and the kinematic-wave analysis. These models however have the following problems; modeling of area and pipes is complex and preparation for input-data requires too much load to perform. Therefore, the AR Hydrograph method is presented. The right value of the AR coefficient had the application of wide range. The key point is to gain the value of AR coefficient. The AR Hydrograph method was applied to the modeled runoff patterns, which resulted in the good expression between the concentration time and the AR coefficient. Then, the runoff analysis can be readily performed whether runoff data is found or not.
