OPTIMIZATION OF THE PARAMETERS AFFECTING THE RAIN FALL-RUN OFF IN SWAT SEMI DISTRIBUTIVE MODEL (CASE STUDY OF GHAZAGHLI WATERSHED, GOLESTAN PROVINCE)

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SALMANI H.; ROSTAMI KHALAJ M.; MOHSENI SARAVI M.; ROUHANI H.; SALAJEGHE A.

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Journal: NATURAL ECOSYSTEMS OF IRAN Year:2013 | Volume:3 | Issue:2 Page(s): 85-100

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Title

OPTIMIZATION OF THE PARAMETERS AFFECTING THE RAIN FALL-RUN OFF IN SWAT SEMI DISTRIBUTIVE MODEL (CASE STUDY OF GHAZAGHLI WATERSHED, GOLESTAN PROVINCE)

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Keywords

OPTIMIZATIONQ1

RAIN FALL- RUN OFFQ1

GHAZAGHLI WATERSHEDQ2

SWAT MODELQ2

GLUEQ2

Abstract

Study of rainfall-runoff processes in hydrological models is associated with uncertainty, due to the influence of various parameters. Accurate of these models to predict the basin hydrological response can be improved whit localizing the optimal values of parameters. For this purpose in this study, SWAT semi distributive model and GLUE program in SWAT CUP software package was used for OPTIMIZATION the sensitive parameters. In GHAZAGHLI WATERSHED with 7072 km2 area in both daily and monthly time studies were performed. After the initial run the model, basin was divided into 37 sub-basins and 278 hydrologic response units (HRU). In sensitivity analysis of initial parameters, 17 parameters of 27 parameters were more sensitive, in daily and monthly period curve number(CN) was determined the most sensitive parameter. After Sensitivity analysis and identification the critical parameters of the model, flow in daily and monthly periods with the 0.69, 0.86 correlation coefficient (R2) and Nash-Sutcliffe coefficient (ENS), 0.68 and 0.84, was calibrated respectively. The values of these coefficients for verification processes were obtained 0.87, 0.86 and 0.65 and 0.83 in during the day and month, respectively. The value of P_factor obtained between 0.34-0.9 and R_factor obtained between 0.51-1.14 indicates after the simulation that shown the low uncertainty and high accuracy of the model in simulation the most of the observed data were within 95% prediction uncertainty band; therefore, this model can be a useful tool to use for management of water resources and watershed characterization and optimal management of water resources systems.

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APA: Copy

SALMANI, H., ROSTAMI KHALAJ, M., MOHSENI SARAVI, M., ROUHANI, H., & SALAJEGHE, A.. (2013). OPTIMIZATION OF THE PARAMETERS AFFECTING THE RAIN FALL-RUN OFF IN SWAT SEMI DISTRIBUTIVE MODEL (CASE STUDY OF GHAZAGHLI WATERSHED, GOLESTAN PROVINCE). NATURAL ECOSYSTEMS OF IRAN, 3(2), 85-100. SID. https://sid.ir/paper/215247/en

Vancouver: Copy

SALMANI H., ROSTAMI KHALAJ M., MOHSENI SARAVI M., ROUHANI H., SALAJEGHE A.. OPTIMIZATION OF THE PARAMETERS AFFECTING THE RAIN FALL-RUN OFF IN SWAT SEMI DISTRIBUTIVE MODEL (CASE STUDY OF GHAZAGHLI WATERSHED, GOLESTAN PROVINCE). NATURAL ECOSYSTEMS OF IRAN[Internet]. 2013;3(2):85-100. Available from: https://sid.ir/paper/215247/en

IEEE: Copy

H. SALMANI, M. ROSTAMI KHALAJ, M. MOHSENI SARAVI, H. ROUHANI, and A. SALAJEGHE, “OPTIMIZATION OF THE PARAMETERS AFFECTING THE RAIN FALL-RUN OFF IN SWAT SEMI DISTRIBUTIVE MODEL (CASE STUDY OF GHAZAGHLI WATERSHED, GOLESTAN PROVINCE),” NATURAL ECOSYSTEMS OF IRAN, vol. 3, no. 2, pp. 85–100, 2013, [Online]. Available: https://sid.ir/paper/215247/en

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