A simulation of the rainfall-runoff process using artificial neural network and HEC-HMS model in forest lands

Vahid Gholami and Mohammad Reza Khaleghi
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Vahid Gholami: Department of Range and Watershed Management and Department of Water Engineering and Environment, Faculty of Natural Resources, University of Guilan, Rasht, Iran
Mohammad Reza Khaleghi: Torbat-e-Jam Branch, Islamic Azad University, Torbat-e-Jam, Iran

Journal of Forest Science, 2021, vol. 67, issue 4, 165-174

Abstract: Simulation of the runoff-rainfall process in forest lands is essential for forest land management. In this research, a hydrologic modelling system (HEC-HMS) and artificial neural network (ANN) were applied to simulate the rainfall-runoff process (RRP) in forest lands of Kasilian watershed with an area of 68 square kilometres. The HMS model was performed using the secondary data of rainfall and discharge at the climatology and hydrometric stations, the Soil Conservation Service (SCS) for simulating a flow hydrograph, the curve number (CN) method for runoff estimation, and lag time method for flow routing. Further, a multilayer perceptron (MLP) network was used for simulating the rainfall-runoff process. HEC-HMS model was used to optimize the initial loss (IL) values in the rainfall-runoff process as an input. IL reflects the conditions of vegetation, soil infiltration, and antecedent moisture condition (AMC) in soil. Then, IL values and also incremental rainfall were applied as inputs into ANN to simulate the runoff values. The comparison of the results of simulating the RRP in two scenarios, using IL and without IL, showed that the IL parameter has a high effect in increasing the simulation performance of the rainfall-runoff process. Moreover, ANN predictions were more precise in comparison with those of the HMS model. Further, forest lands can significantly increase IL values and decrease runoff generation.

Keywords: initial loss; flood; optimization; forest lands; Kasilian watershed (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnljfs:v:67:y:2021:i:4:id:90-2020-jfs

DOI: 10.17221/90/2020-JFS

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