HEC-HMS Based Rainfall-Runoff Model for Araku Valley, Visakhapatnam, Andhra Pradesh, India

Abstract

It has become necessary to estimate the quantities of runoff by knowing the amount of rainfall tocalculate the required quantities of water storage in river basin and to determine the likelihood of amount of discharge. The present study deals with the development of a hydrological model named Hydrologic Engineering Centre (HEC-HMS), which uses Digital Elevation Models (DEM). This hydrological model was used by means of the Geospatial Hydrologic Modeling Extension (HEC-GeoHMS) and Geographical Information Systems (GIS) to identify the discharge of the Araku valley catchment of Vishakhapatnam by simulated rainfall-runoff processes. The meteorological models were developed within the HEC-HMS from the recorded daily rainfall data for the hydrological years 2023. The control specifications were defined for the specified period and one day time step. The Deficit and Constant method, Clark Unit Hydrograph and Muskingum methods were used for loss, transformation and routing calculations, respectively. Hydrologic Engineering Centre (HEC-HMS) is hydrologic modeling software developed by the US Army Corps of Engineers of the Hydrologic Engineering Centre (HEC), which contains an integrated tool for modeling hydrologic processes of dendritic watershed systems. This model consists of several components for processing rainfall loss, direct runoffs and routing. The HEC-HMS model has been widely used, for example, in many hydrological studies because of its simplicity and capability to be used in common methods. The Geospatial Hydrologic Modeling Extension (HEC-GeoHMS) is a public-domain software package for use with Geographical Information Systems (GIS), GeoHMS ArcView and Spatial Analysis to develop several hydrological modeling inputs. After analysing the information of the Digital Elevation Model (DEM), HEC-GeoHMS transforms the drainage paths and watershed boundaries into a hydrologic data structure that represents the watershed response to rainfall.