Calculation result at Deli River return period flood discharge 2 years with an area of 14.8 km² annual flood hydrograph the total is 26.79 m³/sec on the hours at the 4th time. Furthermore, the calculation of the periodic flood discharge using the Nakayasu Method. ![]() This research is analyzed on several methods such as log Pearson, Gumbel and hydrograph unit, while HEC-RAS method is modeling conducted in analyzing the water profile of the Deli River. The purpose of this research is to know flood discharge at Deli river as Flood control in Medan city. ![]() Deli River floods often occur, either caused by a smaller capacity than the existing discharge, lack of maintenance and drainage and disposal systems that do not fit with the environment, resulting in flood subscriptions every year. ![]() The problem in this research is how in the rainy season the water does not overflow, does not occur flood and during the dry season does not occur drought so it can adjust the condition or existence of Deli river which is around Medan city.
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