EVALUATION OF DWB MODEL AND ITS MODIFIED VERSION ON ESTIMATION OF ANNUAL WATER BALANCE COMPONENTS OF WATERSHED (CASE STUDY: NEYSHABUR AND ROKH WATERSHED)

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EMAMIFAR S.; DAVARI K.; ANSARI H.; GHAHREMAN B.; HOSSEINI S.M.; NASSERI M.

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Journal: IRAN-WATER RESOURCES RESEARCH Year:2018 | Volume:14 | Issue:2 Page(s): 72-88

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Title

EVALUATION OF DWB MODEL AND ITS MODIFIED VERSION ON ESTIMATION OF ANNUAL WATER BALANCE COMPONENTS OF WATERSHED (CASE STUDY: NEYSHABUR AND ROKH WATERSHED)

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WATER BALANCEQ2

PROPORTIONALITY COEFFICIENTQ1

SDDWBQ1

UNCERTAINTYQ2

Abstract

The main purpose of this study was to implement, evaluate and modify the Dynamic WATER BALANCE model (DWB) considering the proportional coefficients, like hydrological reality-based constraints, and implement the withdrawal of groundwater and surface water resources along with calibration and UNCERTAINTY analysis of its parameter. Based on the results and principal of equifinality, it is clear that a unique best set of optimal parameters of SDDWB and DWB modelscannot be achieved in general, and often the models’ parameters in the selected study areas to test (Neyshabur and Rokh watersheds) had similar effect on the simulated WATER BALANCE. The average total amount of surface WATER BALANCE error in DWB model for Neyshabur and Rokh watersheds were respectively -9.74 and -69.63 m3 which represented the poor performance of the model. There was a significant difference between the simulated and observed aquifer volume changes for which the main reason was that the effects of groundwater withdrawals were not employed in the model. Reviewing the performance results showed that the relative PRMSE index of the SDDWB model for both study areas were less than 10 percent, indicating the acceptable accuracy of the SDDWB model. In general, the results depicted that the overall error rate of surface and groundwater discharge equation components in SDDWB model were much lower than the DWB model which indicated the positive effects of its modification and development versus its original structure, DWB model.

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APA: Copy

EMAMIFAR, S., DAVARI, K., ANSARI, H., GHAHREMAN, B., HOSSEINI, S.M., & NASSERI, M.. (2018). EVALUATION OF DWB MODEL AND ITS MODIFIED VERSION ON ESTIMATION OF ANNUAL WATER BALANCE COMPONENTS OF WATERSHED (CASE STUDY: NEYSHABUR AND ROKH WATERSHED). IRAN-WATER RESOURCES RESEARCH, 14(2 ), 72-88. SID. https://sid.ir/paper/100342/en

Vancouver: Copy

EMAMIFAR S., DAVARI K., ANSARI H., GHAHREMAN B., HOSSEINI S.M., NASSERI M.. EVALUATION OF DWB MODEL AND ITS MODIFIED VERSION ON ESTIMATION OF ANNUAL WATER BALANCE COMPONENTS OF WATERSHED (CASE STUDY: NEYSHABUR AND ROKH WATERSHED). IRAN-WATER RESOURCES RESEARCH[Internet]. 2018;14(2 ):72-88. Available from: https://sid.ir/paper/100342/en

IEEE: Copy

S. EMAMIFAR, K. DAVARI, H. ANSARI, B. GHAHREMAN, S.M. HOSSEINI, and M. NASSERI, “EVALUATION OF DWB MODEL AND ITS MODIFIED VERSION ON ESTIMATION OF ANNUAL WATER BALANCE COMPONENTS OF WATERSHED (CASE STUDY: NEYSHABUR AND ROKH WATERSHED),” IRAN-WATER RESOURCES RESEARCH, vol. 14, no. 2 , pp. 72–88, 2018, [Online]. Available: https://sid.ir/paper/100342/en

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