Floodplain Delineation Using HECRAS Model—A Case Study of Surat City  

作　　者：Chandresh G. Patel Pradip J. Gundaliya Chandresh G. Patel;Pradip J. Gundaliya(Department of Civil Engineering, UVPCE, Ganpat University, Kherva, India;Lalbhai Dalpatbhai College of Engineering, Ahmedabad, India)

机构地区：[1]Department of Civil Engineering, UVPCE, Ganpat University, Kherva, India [2]Lalbhai Dalpatbhai College of Engineering, Ahmedabad, India

出　　处：《Open Journal of Modern Hydrology》2016年第1期34-42,共9页现代水文学期刊（英文）

摘　　要：Surat city, the commercial capital of Gujarat state, India is situated at latitude 21°06’ to 21°15’ N and longitude 72°45' to 72°54'E on the bank of river Tapi and is affected by flood once in every five years since last hundred years. Present study describes the application of HEC-RAS model with integration of GIS for delineation of flood plain. Digital Elevation Model (DEM) of Surat city is used as main input for flood inundation mapping. River section near Nehru Bridge is used as sample case to simulate flood flow. Discharges equal to food return period for 25 and 32 (worst flood year) have been used for investigation of flood scenario. Outcome of the research clearly indicates that most of the area of the Surat city is submerged for a depth of 2.5 to 4.0 m when the discharge released from Ukai dam equals to return period of 32 years (25768.09 Cumecs).Surat city, the commercial capital of Gujarat state, India is situated at latitude 21°06’ to 21°15’ N and longitude 72°45' to 72°54'E on the bank of river Tapi and is affected by flood once in every five years since last hundred years. Present study describes the application of HEC-RAS model with integration of GIS for delineation of flood plain. Digital Elevation Model (DEM) of Surat city is used as main input for flood inundation mapping. River section near Nehru Bridge is used as sample case to simulate flood flow. Discharges equal to food return period for 25 and 32 (worst flood year) have been used for investigation of flood scenario. Outcome of the research clearly indicates that most of the area of the Surat city is submerged for a depth of 2.5 to 4.0 m when the discharge released from Ukai dam equals to return period of 32 years (25768.09 Cumecs).

关 键 词：Surat FLOOD River Tapi Return Period HEC-RAS 

分 类 号：F42[经济管理—产业经济]