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Published in Chalachew Abebe Mulatu, Downstream Consequences of Ribb River Damming, Lake Tana Basin, Ethiopia, 2022
The Lower Gauging stations of the Ribb and the Gumara Rivers are located within the floodplain where the peak discharges that cause flooding are not confined by the banks (SMEC, 2008b; Dessie et al., 2014; Mulatu et al., 2018). For example, Dessie et al. (2014) indicated a peak flood reduction, relative to the rated discharge, of the Ribb River at the lower gauging station up to 71% between December 2011 and December 2012. Therefore, the discharge data of the rivers derived from gauging stations’ rating curves cannot be used for flood flow analysis in this study. Instead, a HEC-HMS rainfall-runoff model was developed for the Ribb and Gumara River watersheds to determine the daily time-series discharge data. HEC-HMS is developed by the United States Army Corps of Engineers (USACE) and simulates the rainfall-runoff process of dendritic watershed systems (Scharffenberg and Fleming, 2016). It is selected as it has been successfully applied to simulate both short- and long-term rainfall-runoff events in Ethiopia (Halwatura and Najim, 2013; Demlie G Zelelew and Assefa M Melesse, 2018; Tassew et al., 2019). Moreover, data availability, the ability of the model to operate huge tasks with hydrological studies, and modeling experience were considered.
Rainfall-runoff modelling
Published in Amithirigala Widhanelage Jayawardena, Fluid Mechanics, Hydraulics, Hydrology and Water Resources for Civil Engineers, 2021
Amithirigala Widhanelage Jayawardena
HEC-HMS is a generalized modelling system, developed in 1992 to supersede HEC-1, and is the standard model used in the private sector in the US. It is, in some sense, distributed in that the catchment is sub-divided into smaller sub-catchments. Any mass or energy flux in the hydrological cycle can then be represented by a mathematical model. In most cases, several model choices are available for representing each flux. Each mathematical model included in the program is suitable in different environments and under different conditions. Making the correct choice requires knowledge of the catchment, the goals of the hydrologic study and engineering judgment. HEC-HMS provides a number of options for simulating the rainfall-runoff process. These include precipitation modelled using either actual gauged events or hypothetical, frequency-based storms, rainfall losses represented empirically (SCS) or with physically based algorithms (Green and Ampt), runoff generated from unit hydrographs or kinematic wave method, stream routed by Muskingum, Muskingum-Cunge and kinematic wave methods, and reservoir routing, base flow and diversions modelling.
Real-Time Operation of Reservoirs during Flood Conditions Using Optimization-Simulation with One- and Two-Dimensional Modeling
Published in Saeid Eslamian, Faezeh Eslamian, Flood Handbook, 2022
Hasan Albo-Salih, Larry W. Mays, Daniel Che
The hydrologic modeling system (HEC-HMS) was developed by the US Army Corps of Engineers (USACE) Hydrologic Engineering Center (HEC) (Feldman, 2000). HEC-HMS simulates the rain-runoff processes of dendritic watershed systems. It is designed to be applicable in a wide range of geographic areas for solving a wide range of problems. The model may include large river basin water sources and flood hydrology to urban or natural watershed runoff. The program produces hydrographs that can be used in different ways with different software for water management studies, reservoir spillway design, urban drainage, future urbanization impact, flow forecasting, flood damage reduction, floodplain regulation, wetlands hydrology, and systems operation (Fleming and Brauer, 2016).
Revisiting 2013 Uttarakhand flash floods through hydrological evaluation of precipitation data sources and morphometric prioritization
Published in Geomatics, Natural Hazards and Risk, 2022
Pratiman Patel, Praveen Kumar Thakur, Shiv Prasad Aggarwal, Vaibhav Garg, Pankaj Ramji Dhote, Bhaskar Ramachandra Nikam, Sabyasachi Swain, Nadhir Al-Ansari
In this study, the Hydrologic Engineering Center’s Hydrologic Modeling System (HEC-HMS) version 4.2 developed by the US Army Corps of Engineers, is used for rainfall-runoff modelling. HEC-HMS allows sub-basins to generate the runoff by representing each hydrologic component. The different hydrologic components include initial losses, base-flow, channel routing, and runoff generation. The model is divided into three sub-models, i.e. the basin model, the precipitation model, and the control model. The basin model controls the basin, routing, and connectivity parameters. The precipitation model handles the rainfall information of the model. The control model contains the timing information of the simulations. The details of the model structure and various processes available are given in the HEC-HMS User’s Manual (Feldman 2020). However, the information on the model's important processes used in this study is provided below.
Operationalizing a flood forecasting decision support system for Ayeyarwady river, Myanmar
Published in International Journal of River Basin Management, 2021
Anshul Agarwal, Uttam Ghimire, Htay Htay Than, Govindarajalu Srinivasan, Itesh Dash, Niraj Shakya, Myo Tun Oo
HEC-HMS is designed to simulate the precipitation runoff processes within a wide range of geographic areas and is widely used in different parts of the world for estimating runoff. A primary reason for this is the flexibility of HEC-HMS, as it can be setup as a lumped or semi-distributed hydrologic model (Zelelew & Melesse, 2018). HEC-HMS has been used as a semi-distributed model in many studies (Zelelew & Melesse, 2018; Zhang et al., 2013) and recommended for flood forecasting by various agencies and researchers around the world (Anderson et al., 2002; Du et al., 2012; Knebl et al., 2005; Oleyiblo & Li, 2010). HEC-HMS has also been applied for daily flow simulation in Upper Ayeyarwady river basin in the past, and its performance was very good, even with nominal data inputs (Ghimire et al., 2019a)
Land use/land cover change along the Eastern Coast of the UAE and its impact on flooding risk
Published in Geomatics, Natural Hazards and Risk, 2020
Khalid Hussein, Khaula Alkaabi, Dawit Ghebreyesus, Muhammed Usman Liaqat, Hatim O. Sharif
In this study, the Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) model was used for hydrologic modelling. HEC-HMS is a semi-distributed, sub-basin-based modelling system developed by the U.S. Army Corps of Engineering to simulate the hydrology of a watershed (USACE and HEC 2016). The model includes several sub-models to simulate different components of the runoff generation process with the choice of different infiltrations, unit hydrograph and flood routing methods. HEC-HMS is widely used because of its simplicity and the small number of parameters, which makes calibration relatively easier. The Soil Conservation Service (SCS) (currently the Natural Resources Conservation Service (NRCS)) curve number (CN) method (SCS 1986) is the main parameter used for estimating the infiltration capacity and runoff for various combinations of soil and land use/cover types.Several studies have demonstrated that the CN method can be applied in different environments and is able to produce reasonable results comparable to those of more complex models despite its simplicity (e.g. Ponce and Hawkins 1996; Shrestha 2003).