| Title: | Historical streamflow series analysis applies to Furnas HPP reservoir watershed using the SWAT model |
| Authors: | de Souza Dias, V., M.P. da Luz, G.M. Medero, D.T.F. Nascimento, W.N. de Oliveira and L.R. de Oliveira Merelles |
| Year: | 2018 |
| Journal: | Water |
| Volume (Issue): | 10(4) |
| Pages: | |
| Article ID: | 458 |
| DOI: | 10.3390/w10040458 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | calibration, sensitivity, and/or uncertainty analysis |
| Secondary Application Category: | hydrologic assessment |
| Watershed Description: | 16,252 km^2 upper part of the Grande River, which drains portions of the states of Mato Grosso do Sul, Sao Paulo and Minas Gerras in southern Brazil. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | Over the last few years, the operation of the Furnas Hydropower Plant (HPP) reservoir,
located in the Grande River Basin, has been threatened due to a significant reduction in inflow.
In the region, hydrological modelling tools are being used and tested to support decision making
and water sustainability. In this study, the streamflow was modelled in the area of direct influence
of the Furnas HPP reservoir, and the Soil andWater Assessment Tool (SWAT) model performance
was verified for studies in the region. Analyses of sensitivity and uncertainty were undertaken
using the Sequential Uncertainty Fitting algorithm (SUFI-2) with a Calibration Uncertainty Program
(SWAT-CUP). The hydrological modelling, at a monthly scale, presented good results in the calibration
(NS 0.86), with a slight reduction of the coefficient in the validation period (NS 0.64). The results
suggested that this tool could be applied in future hydrological studies in the region of study.
With the consideration that special attention should be given to the historical series used in the
calibration and validation of the models. It is important to note that this region has high demands for
water resources, primarily for agricultural use. Water demands must also be taken into account in
future hydrological simulations. The validation of this methodology led to important contributions
to the management of water resources in regions with tropical climates, whose climatological and
geological reality resembles the one studied here. |
| Language: | English |
| Keywords: | hydrological modelling; hydroelectric reservoir; SWAT model; streamflow |