Journal of Marine Science and Technology

Journal of Marine Science and Technology

Investigating Parameter Sensitivity of Continuous Soil Moisture Accounting Model (case study: Zard River basin)

Document Type : Original Manuscript

Authors
Pedram Mahdavi 1
Hossein Ghorbanizadeh Kharazi 1
Hossein Eslami 1
Narges Zohrabi 2
Majid Razaz 1
1 Department of Civil Engineering-Water Resources Management, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
2 Department of Water Sciences and Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
10.22113/jmst.2020.188459.2290
Abstract
This study was conducted using continuous hydrological modeling available in HEC-HMS model with respect to SMA method for Zard River basin in Iran. To perform the HEC-HMS model in the present study, spatial data such as soil map, digital elevation model, land use land cover map were used to define catchment boundary and other physiological characteristics of basin. The model was calibrated for period of 1975-1978 and it was validated for the period of 1978-80. The evaluation of calibrated model showed that the performance of the model ranges from good to very good with a coefficient of determination for monthly volumes =0.92, Log =0.93, Percentage error for monthly volumes (PEV)=1%, Root Mean Square Error of daily peak flows (RMSE)=8.5(m^3/s) and Mean Absolute Error of daily peak flows (MAE)=3.2(m^3/s). Sensitivity analysis showed that soil storage and tension storage are most sensitive parameters and initial GW2 content and GW2 percolation are least sensitive parameters in the model. From the results it can be concluded that SMA method in HEC-HMS conceptual model perform good enough and can be used for continuous long-term rainfall-runoff modeling in Zard River basin.
Keywords
Continuous Hydrological Modeling
SMA
Zard River
Sensitivity Analysis
HEC-HMS Model
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  • Receive Date 01 June 2019
  • Revise Date 30 December 2019
  • Accept Date 11 January 2020
  • Publish Date 19 February 2021