| Title: | Water budget in a tile drained watershed under future climate change using SWATDRAIN model |
| Authors: | Golmohammadi, G., R. Rudra, S. Prasher, A. Madani, K. Mohammadi, P. Goel and P. Daggupatti |
| Year: | 2017 |
| Journal: | Climate |
| Volume (Issue): | 5(2) |
| Pages: | |
| Article ID: | 39 |
| DOI: | 10.3390/cli5020039 |
| URL (non-DOI journals): | |
| Model: | SWATDRAIN |
| Broad Application Category: | hydrologic and pollutant |
| Primary Application Category: | climate change assessment |
| Secondary Application Category: | tile drainage effects and/or processes |
| Watershed Description: | 143 km^2 Canagagigue Creek, a tributary of the Grand River located in southeast Ontario, Canada. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | The SWATDRAIN model was developed by incorporating the subsurface flow model,
DRAINMOD, into a watershed scale surface flow model, SWAT (Soil and Water Assessment
tool), to simulate the hydrology and water quality of agricultural watersheds. The model is
capable of simulating hydrology under different agricultural management and climate scenarios.
As an application of the SWATDRAIN model, the impact of climate change on surface/subsurface
flow was evaluated in the Canagagigue Creek watershed in southern Ontario, Canada. Using the
assumption that there has been no change in land cover and land management, the model was
applied to simulate annual, seasonal, and monthly changes in surface and subsurface flows at the
outlet of the watershed under current and future climate conditions. The climate scenario under
consideration in this study for 2015–2044 was derived from CGCM2 (Canadian Global Circulation
Model 2), with A2 scenario for future climatic simulation. The SWATDRAIN model’s ability to predict
the impacts of future climate change scenarios in agricultural watersheds due to monthly NSE (Nash
Sutcliffe Efficiency), PBIAS (Percent Bias), and RSR (Root Mean Square Error) values of 0.74, 3.67,
and 0.37, respectively, for the validation phase. The results showed that general climate change effects
more spring and winter hydrology than summer hydrology. The results show that the annual flow is
expected to increase in future, which will lead to an increase in the sediment loads in the stream. |
| Language: | English |
| Keywords: | SWATDRAIN; climate change; hydrology; drainage; cold climate |