Author(s)

Fitsum T. Teshome^1,2*, Haimanote K. Bayabil², L. N. Thakural³, Fikadu G. Welidehanna²

¹Department of Plant Science, College of Agriculture and Natural Resources, Madda Walabu University, Bale-Robe, Ethiopia.
²Department of Agricultural and Biological Engineering, Tropical Research and Education Center, IFAS, University of Florida, Homestead, FL, USA.
³Surface Water Hydrology Division, National Institute of Hydrology, Roorkee, India.

Modeling watershed hydrological processes are important for water resources planning, development, and management. In this study, the MIKE 11-NAM (Nedbor-Afstromings Model model) was evaluated for simulation of streamflow from the Bina basin located in the Madhya Pradesh State of India. The model was calibrated and validated on a daily basis using five years (1994-1998) observed hydrological data. In addition, a model sensitivity analysis was performed on nine MIKE 11-NAM parameters to identify sensitive model parameters. Statistical and graphical approaches were used to assess the performance of the model in simulating the streamflow of the basin. Results show that during daily model calibration, the model performed very well with a coefficient of determination (R²) and the percentage of water balance error (WBL) values 0.87% and -8.63%, respectively. In addition, the model performed good during the validation period with R² and WBL values of 0.68% and -6.72%, respectively. Model sensitivity analysis results showed that Overland flow runoff coefficient (CQOF), Time constant for routing overland flow (CK1,2) and Maximum water content in root zone storage (L_max) were found as the most influential and sensitive model parameters for simulating streamflow. Overall, the model’s performance was satisfactory based on R² and EI metrics.

Lumped Conceptual Model, MIKE 11-NAM, Sensitivity Analysis, Rainfall-Runoff Modeling

Teshome, F. , Bayabil, H. , Thakural, L. and Welidehanna, F. (2020) Verification of the MIKE11-NAM Model for Simulating Streamflow. Journal of Environmental Protection, 11, 152-167. doi: 10.4236/jep.2020.112010.