Review on the HEC-HMS Rainfall-Runoff Simulation Model

There are various natural resources available on the earth; water is one of them that has its utility in agriculture, industries, household, and the survival of all living beings.Water plays an important part in the communal as well as economic development of the nation.Thus,development planning, in addition management of various resources of water isrequired to meet various water demands.The long-term, reliable and accurate historical flow or discharge data are of utmost importance in managing various resources of water.However, obtaining gauge discharge data has always been a challenge in the country as it is not possible to make measurements at every location in the river.Thus, Rainfall-Runoff modelling is one of the important tools which uses a set of known parameter data and appropriate mathematical equations to simulate flow record at the desired location.The number of hydrological models has been evolved for simulating runoff from the rainfall data in last 10 years i.e.HEC-HMS .HEC HMS is the hydrological model that has the capability of transforming rainfall into runoff.HEC HMS is frequently used rainfall runoff model, created by USACE,accessible in the free domain and can estimate Runoff from the Rainfall.The present paper reviews the studies carried out by researchers on the HEC-HMS model worldwide to ascertain its ability to simulate runoff with accuracy and to make use for decision-making.From the review, it could be summarised that many researchers.From the review, it could be seen that many researchers compared different modelling methods to obtain the best model suitable under different hydrological conditions and found HEC-HMS as a good model over others and recommended it for simulation of runoff.From the reviews, it was seen that the HEC-HMS rainfall-runoff model has a vast range of utility in flood forecasting and water resource planning and management.In most of the studies, HEC-HMS rainfall-runoff modelling was found efficient and reliable in different river basins to simulate runoff with accuracy.Thus, the model could be used for runoff simulation in an ungauged basin for water resources planning, development, management, and decisionmaking.