| Title: | Uncertainty in a lumped and a semi-distributed model for discharge prediction in Ghatchila Catchment |
| Authors: | Yaduvanshi, A., P. Srivastava, A.W. Worqlul and A.K. Sinha |
| Year: | 2018 |
| Journal: | Water |
| Volume: | 10(4) |
| Pages: | |
| Article ID: | 381 |
| DOI: | 10.3390/w10040381 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | model comparison |
| Secondary Application Category: | calibration, sensitivity, and/or uncertainty analysis |
| Watershed Description: | 14,176 km^2 Ghatshila River, a tributary of the Subarnarekha River in northeast India. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | Hydrologic simulations of different models have direct impact on the accuracy of discharge
prediction because of the diverse model structure. This study is an attempt to comprehend the
uncertainty in discharge prediction of two models in the Ghatshila catchment, Subarnarekha Basin
in India. A lumped Probability Distribution Model (PDM) and semi-distributed Soil and Water
Assessment Tool (SWAT) were applied to simulate the discharge from 24 years of records (1982–2005),
using gridded ground based meteorological variables. The results indicate a marginal outperformance
of SWAT model with 0.69 Nash-Sutcliffe (NSE) for predicting discharge as compared to PDM with
0.62 NSE value. Extreme high flows are clearly depicted in the flow duration curve of SWAT
model simulations. PDM model performed well in capturing low flows. However, with respect
to input datasets and model complexity, SWAT requires both static and dynamic inputs for the
parameterization of the model. This work is the comprehensive evaluation of discharge prediction
in an Indian scenario using the selected models; ground based gridded rainfall and meteorological
dataset. Uncertainty in the model prediction is established by means of Generalized Likelihood
Uncertainty Estimation (GLUE) technique in both of the models. |
| Language: | English |
| Keywords: | SWAT; PDM; GLUE; model structure; discharge |