Flood zoning estimation and river management by using HEC-RAS and GIS model

Authors

Abstract:

Reliable estimates of river stream fl ow and fl ood zoning maps are needed for water resourcesmanagement such as fl ood mitigation, water supply, dam construction and irrigation. Flood zoning needsaccurate data and is one of the non-structural fl ood management methods. This paper describes theapplication of HEC-RAS and GIS model to determine fl oodplains maps for the part of Sardabrud Riverthat lies in Mazandaran province (Iran). Results obtained by HEC-RAC model were used in combinationwith GIS to prepare fl ood zoning maps for different return periods. For this purpose, the geometrical planof the river was prepared with the aid of HEC-RAS software and through regional topography data. Afterimporting the data to HEC-RAS model, fl ood phenomenon was simulated in 2, 5, 10, 50, 100, 500, and1000 years return periods. Through fl ood zoning maps, areas that are vulnerable to fl ooding hazards havebeen identifi ed. Analysis of fl ood zoning maps indicated that more than 168 square kilometer is likely to beinundated as compared to the normal fl ow of the river. Also results of the current study indicate that depthof fl ow is happened in 1000-year return period and 163 meters respectively.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

flood zoning estimation and river management by using hec-ras and gis model

reliable estimates of river stream fl ow and fl ood zoning maps are needed for water resourcesmanagement such as fl ood mitigation, water supply, dam construction and irrigation. flood zoning needsaccurate data and is one of the non-structural fl ood management methods. this paper describes theapplication of hec-ras and gis model to determine fl oodplains maps for the part of sardabrud rivertha...

full text

Flood hazard zoning using geographic information system (GIS) and HEC-RAS model (Case study: Rasht City)

Rivers are important water resources for human life, but sometimes cause irreparable damages. The flood plains are fertile terrains which are endangered by flood. Flood hazard mapping is one of the basic methods in flood fighting. In order to decline flood damages, the simulation of the hydraulic behavior of the rivers during flood occurrence is very important. In this study, areas that are flo...

full text

flood hazard zoning using geographic information system (gis) and hec-ras model (case study: rasht city)

rivers are important water resources for human life, but sometimes cause irreparable damages. the flood plains are fertile terrains which are endangered by flood. flood hazard mapping is one of the basic methods in flood fighting. in order to decline flood damages, the simulation of the hydraulic behavior of the rivers during flood occurrence is very important. in this study, areas that are flo...

full text

Zoning the villages at flood risk in the Varkesh-Chai drainage basin by GIS and HEC - RAS software and HEC- GEO - RAS extension

Varkesh-Chai River with approximately 69 kilometer and north-south trend, in one of the main and permanent rivers of Tabriz city, That 10 villages with worn out texture have established in its main bed. Field studies show that, villages’development has been without knowing the rules governing hydraulic behavior, prediction of river hydrological behavior, and no respecting the main bed of river,...

full text

Roughness uncertainty analysis in river flooding using HEC-RAS model

Although flood maps based on the deterministic approach play an important role in minimizing flood losses, there is considerable uncertainty in calculating the level of water inundation. Roughness is a key parameter in water surface elevation. Since roughness is not easily measurable and is estimated based on experimental and laboratory methods, it introduces a significant degree of uncertainty...

full text

Flood hazard zoning using HEC-RAS in GIS environment and impact of manning roughness coefficient changes on flood zones in Semi-arid climate

Development of rural areas in rivers margins and flood plains, without understanding and attention to the dynamical and hydrological conditions and upstream areas of the rivers will cause to increase flood risk and loss of life and financial. Flood zoning has many applications, in floodplain management. For management of the three major branches of the Halilrood River, Rabor, Roodar and Javaran...

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 1  issue 1

pages  13- 18

publication date 2017-01-01

By following a journal you will be notified via email when a new issue of this journal is published.

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023