Use of Hec-Ras Software to Analyze Floods in Joyoakan Urban Village, Surakarta City, Central Java

One of the natural phenomena that threaten existence human life in several regions Indonesia every time rainy season begins is flooding, one which occurs Joyoakan sub-district Surakarta City. Topographically, it a hollow area (under main road), making easier for water to enter area. This what makes Premulung and Kaliwingko rivers unable accommodate rainwater discharge additional shipments from Boyolali Sukoharjo areas. The purpose this study determine how much volume inundation drainage canal can be reduced appropriate efforts deal with occurs. method used descriptive research, provide an overview variables studied modeling using HEC-RAS software. result calculation potential by channel at Q5 return period 6,842.577 m3, Q10 6,962.517 Q25 7,100.448 while results dimension analysis, there are still puddles points, right alternative overcoming need revitalize channels increasing capacity dimensions current size improving base slope each installing pumps as means control accelerating