FLOOD MODEL SIMULATION OF PURNAMA STREET AREA DUE TO INCREASE OF WATER LEVELS OF THE KAPUAS RIVER AND THE INTENSITY AND DURATION OF RAIN

Flooding is a condition where water not accommodated or the flow of obstructed in sewer, so that it overflows to inundate surrounding area. The area around ditch on Purnama Street (the estuary Kapuas River) affected by tides and intensity duration rainfall. This study aims simulate flood model occurred Data analysis was carried out using HEC-RAS software as tool for modeling drainage flow. research conducted during no rain conditions, 5 10 year return periods highest lowest tidal conditions. simulations were from Demang Ditch Lower River. results show channel River does experience inundation/flooding, but period rains inundation/flooding. which reaches highway.