Using HEC-RAS 1D for Flood Hazard Estimation For Building Construction in the Upstream of the AL Kut Barrage

Abuthena, SI, Hilo, AN and Harris, CB (2025) Using HEC-RAS 1D for Flood Hazard Estimation For Building Construction in the Upstream of the AL Kut Barrage. Wasit Journal of Engineering Sciences, 13 (2). pp. 48-60. ISSN 2305-6932

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Abstract

The construction of buildings and recreational facilities in urban river basins is a well-documented problem that is having a devastating impact on urban infrastructure and human lives due to the increased frequency and severity of extreme rainfall and flooding. The likelihood of flooding cannot be eliminated, although it can be mitigated to some extent. Consequently, future flood control initiatives must priorities integrated strategies that account for both risk uncertainty and flood projections. In order to assess the potential harm, it is crucial to develop a solid approach for flood modelling and mapping. The goal of this study was to develop a flood projection zone by integrating hydrological models with geographic information systems.  at the mouth and mouth of the Tigris River at Kut in central Iraq, at the front and rear of the dam.This was accomplished by making use of the hydrological models HEC-GeoRAS and HEC-RAS. locate areas that are at risk of flooding due to varying flow rates. To generate the DEM, a high-resolution topographic scan of the intended area—including the front and rear of the embankment-was employed. The dam was constructed using 6-kilometer-long front and 12-kilometer-long rear cross sections.  In order to ascertain the depths of the terrain and its variations, GIS technology was employed. Several areas in the study area experienced flooding. A number of drainages were used to validate the model calibration, and the suitable Mannick coefficient for the area was determined by utilising statistical estimations (NSE, RMSE, MAE).  This production quantity corresponds to a maximum flood depth of 17.5 meters. Based on the findings from the analysis using HEC-RAS, it is clear that structures situated in river basins have a significant influence, and a discharge of 2250 m3/s might cause flooding

Item Type:	Article
Uncontrolled Keywords:	3707 Hydrology; 37 Earth Sciences; 3704 Geoinformatics
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TD Environmental technology. Sanitary engineering
Divisions:	Engineering and Built Environment
Publisher:	Wasit University
Date of acceptance:	6 May 2025
Date of first compliant Open Access:	22 September 2026
Date Deposited:	22 Sep 2026 08:30
Last Modified:	22 Sep 2026 08:30
DOI or ID number:	10.31185/wjes.vol13.iss2.681
URI:	https://researchonline.ljmu.ac.uk/id/eprint/29495

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