Abstract
The Hydrologic Engineering Centers Hydrologic Modeling System (HEC-HMS) is a popularly used watershed model to simulate rainfall- runoff process. Hydrological modeling is a commonly used tool to estimate the basin’s hydrological response due to precipitation. It allows to predict the hydrologic response to various watershed management practices and to have a better understanding of the impacts of these practices. It is evident from the extensive review of the literature that the studies on comparative assessment of watershed models for hydrologic simulations are very much limited in developing countries including India. In this study, modified SCS Curve Number method is applied to determine loss model as a major component in rainfall-runoff modeling. The study of HEC-HMS model is used to simulate rainfallrunoff process in Nashik region (Upper Godavari basin), Maharashtra. To compute runoff volume, peak runoff rate, and flow routing methods SCS curve number, SCS unit hydrograph, Exponential recession and Muskingum routing methods are chosen, respectively. The results of the present study indicate that HEC-HMS tool applied to watershed proved to be useful in achieving the various objectives. The study confirmed a significant increase in runoff as a result of urbanization. It is a powerful tool for flood forecasting Index
Highlights
WATER is scarce and there are millions of people across this globe who spend their entire day searching for it; so there is primary need to save water
In a common application, Hydrologic Engineering Centers Hydrologic Modeling System (HEC-HMS) omits any detailed accounting of movement of water vertically within the soil layer
The goal of this study is to identify whether the development of an open area in the watershed of Nasik region increases the runoff and if so, how much
Summary
WATER is scarce and there are millions of people across this globe who spend their entire day searching for it; so there is primary need to save water. Collection and calculation of runoff is one of the remedy to save water; there are various Hydrological models are available for calculation of runoff but HEC -HMS is a choice of suitable one which is important of accurate prediction. The hydrologic modeling system is designed to simulate intact hydrologic processes of watershed systems. Evapotranspiration, infiltration, percolation, and other locomotion and storage should be tracked over a long time and detailed accounting model is required. This model computes and reports the peak volume or the hydrograph of watershed runoff. It encloses procedures necessary for continuous simulation including evapo-transpiration, snow melt and soil moisture accounting. Supplemental analysis tools are provided for parameter estimation, depth area analysis, flow forecasting, erosion and sediment transport and nutrient water quality
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