Application Of Hec-Ras And Arcgis For Flood Mapping Surfaces In Urban Areas - Case Of The City Of Gostivar
Date Issued
2022
Author(s)
Bojan ILIOSKI,
Violeta GJEÅ OVSKA,
Drenushe FIDANI
Abstract
Floods are natural disasters and often result in great material loss and even loss of human life. Their
early prediction is necessary to provide protection from their harmful effects. In order to create accurate,
realistic solutions, there is a need for concrete determination of the flood areas. In recent decades,
various modern techniques have been used to map possible flood areas. One of them is the HEC-RAS
software package.
The purpose of this paper is to map the flooded areas on part of the river Vardar in the city of Gostivar
and to give the competent authorities a base for real solutions for flood protection in urban areas. Using
the software package HEC-RAS in combination with ARC-GIS, a 1D model was made, which obtained
the large waters, namely Q20% = 22 m3/s, Q10% = 39 m3/s, Q4% = 68 m3/s, Q2% = 95 m3/s and Q1%= 124
m3/s.
The output data are displayed on the Orthophoto map. Then, using ArcGIS, the boundaries of the
floodplains are displayed on Google Earth.
It was concluded that the HEC-RAS software package in combination with ARC-GIS is a useful tool,
capable of mapping critical areas, which would serve as the basis on which various possible flood
protection solutions can be provided in urban areas.
early prediction is necessary to provide protection from their harmful effects. In order to create accurate,
realistic solutions, there is a need for concrete determination of the flood areas. In recent decades,
various modern techniques have been used to map possible flood areas. One of them is the HEC-RAS
software package.
The purpose of this paper is to map the flooded areas on part of the river Vardar in the city of Gostivar
and to give the competent authorities a base for real solutions for flood protection in urban areas. Using
the software package HEC-RAS in combination with ARC-GIS, a 1D model was made, which obtained
the large waters, namely Q20% = 22 m3/s, Q10% = 39 m3/s, Q4% = 68 m3/s, Q2% = 95 m3/s and Q1%= 124
m3/s.
The output data are displayed on the Orthophoto map. Then, using ArcGIS, the boundaries of the
floodplains are displayed on Google Earth.
It was concluded that the HEC-RAS software package in combination with ARC-GIS is a useful tool,
capable of mapping critical areas, which would serve as the basis on which various possible flood
protection solutions can be provided in urban areas.
Subjects
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