Flood Modeling on a Reach of Hunza River to Identify Vulnerable Populated Areas
Journal Title: Journal of River Engineering - Year 2015, Vol 3, Issue 1
Abstract
The flood modeling is one of the engineering techniques which provide reliable information of the flood profile. The rainfall, runoff, catchment characteristics, and return period are the parameters which govern the flood. The purpose of flood modeling is to understand and manage the mechanisms at work in floodplains. The objective of this study is to perform one dimensional flood modeling by application of Hydrologic Engineering Centre River Analysis System (HEC-RAS) on a reach downstream of dam created due to natural land slide on Hunza river in Hunza valley of Pakistan. Due to existence of populated areas along the reach, this particular reach length was considered for the purpose of modeling in order to assess the possible risk of flooding. By using the available geometric data and flow data of this particular reach length (15797.71m), the 1-D flood routing was carried out with unsteady flow conditions by utilizing the available dam break outflow hydrograph at river location 16245.89m as upstream boundary condition. The simulated results were analyzed and the possible extent of flooding at specific downstream locations was taken into consideration. It has been found that the areas; Dainyor, Sakwar, Minawar, Hussainabad and Bagrot are vulnerable to flooding and severe disaster could occur in case of extreme flooding.
Authors and Affiliations
Saqib Ehsan - Muhammad Sajjad - Mirza Hammad Baig - Muhammad Faheem
Keywords
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