| Title: | Hydrological modeling and runoff mitigation in an ungauged basin of central Vietnam using SWAT model |
| Authors: | Emam, A.R., M. Kappas, N.H.K. Linh and T. Renchin |
| Year: | 2017 |
| Journal: | Hydrology |
| Volume (Issue): | 4(1) |
| Pages: | |
| Article ID: | 16 |
| DOI: | 10.3390/hydrology4010016 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | regionalization of input parameters |
| Secondary Application Category: | rice paddy dynamics and/or production |
| Watershed Description: | 408 km^2 Song Sia River and 125 km^2 Nam Dong River, located in or neat the A-Luoi District in Thua Thien Province in northeast Vietnam. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | The A-Luoi district in Thua Thien Hue province of Vietnam is under extreme pressure from
natural and anthropogenic factors. The area is ungauged and suffering from data scarcity. To evaluate
the water resources availability and water management, we used Soil and Water Assessment Tools
(SWAT). A multi-approach technique was used to calibrate the hydrological model. The model was
calibrated in three time scales: daily, monthly and yearly by river discharge, actual evapotranspiration
(ETa) and crop yield, respectively. The model was calibrated with Nash-Sutcliffe and R2
coefficients
greater than 0.7, in daily and monthly scales, respectively. In the yearly scale, the crop yield inside
the model was calibrated and validated with Root Mean Square Error (RMSE) less than 2.4 ton/ha.
The water resource components were mapped temporally and spatially. The outcomes showed that
the highest mean monthly surface runoff, 323 to 369 mm, between September and November, resulted
in extreme soil erosion and sedimentation. The monthly average of actual evapotranspiration was the
highest in May and lowest in December. Furthermore, installing “Best Management Practices” (BMPs)
reduced surface runoff in agricultural lands. However, using event-based hydrological and hydraulic
models in the prediction and simulation of flooding events is recommended in further studies. |
| Language: | English |
| Keywords: | water management; regionalization; MODIS; best management practice; surface runoff |