SWAT+

Introducing SWAT+, a completely revised version of the SWAT model. SWAT+ provides a more flexible spatial representation of interactions and processes within a watershed.

Download the SWAT+ installer 1.2.3 released 4 Dec 2019.

Getting Started

The SWAT+ model is a command-line executable file that runs text file inputs. While you can set up these inputs yourself, we provide interfaces to make it easier. There are two pieces to the interface:

  1. QSWAT+, a QGIS interface for setting up your watershed
  2. SWAT+ Editor, a user interface for modifying SWAT+ inputs and running the model

Please refer to the following guides to start using SWAT+:

Need Help?

Because there are 3 distinct pieces to SWAT+, we have created user groups for each. Please identify which area you are having difficulty with and choose the appropriate group:

About SWAT+

Over the past 20 years, the Soil and Water Assessment Tool (SWAT) has become widely used across the globe. The large numbers of applications across the globe have also revealed limitations and identified model development needs. Numerous additions and modifications of the model and its individual components have made the code increasingly difficult to manage and maintain. In order to face present and future challenges in water resources modeling SWAT code has undergone major modifications over the past few years, resulting in SWAT+, a completely revised version of the model.

Even though the basic algorithms used to calculate the processes in the model have not changed, the structure and organization of both the code (object based) and the input files (relational based) have undergone considerable modification. This is expected to facilitate model maintenance, future code modifications, and foster collaboration with other researchers to integrate new science into SWAT modules. SWAT+ provides a more flexible spatial representation of interactions and processes within a watershed.

Additional Tools

Publications

2020
Development of Reservoir Operation Functions in SWAT+ for National Environmental Assessment

Wu, J., H. Yen (corresponding author), J. G. Arnold, Y. E. Yang, X. Cai, M. J. White, S. Chinnasamy, C. Miao, R. Srinivasan (2020) “Development of Reservoir Operation Functions in SWAT+ for National Environmental Assessment.” Journal of Hydrology, 583, 124556. doi.org/10.1016/j.jhydrol.2020.124556

2019
Representing the Connectivity of Upland Areas to Floodplains and Streams in SWAT+

Bieger, K., Arnold, J.G., Rathjens, H., White, M.J., Bosch, D.D., and Allen, P.M.. 2019. “ Representing the Connectivity of Upland Areas to Floodplains and Streams in SWAT+.” Journal of the American Water Resources Association 55 ( 3): 578– 590. doi.org/10.1111/1752-1688.12728.

IPEAT+: A Built-in Optimization and Automatic Calibration Tool of SWAT+.

Yen, H., S. Park, J. G. Arnold, R. Srinivasan, C. J. Chawanda, R. Wang, Q. Feng, J. Wu, C. Miao, K. Bieger, P. Daggupati, A. Griensven, L. Kalin, S. Lee, A. Y. Sheshukov, M. J. White, Y. Yuan, I. Yeo, M. Zhang, X. Zhang (2019) “IPEAT+: A Built-in Optimization and Automatic Calibration Tool of SWAT+.” Water, 11(8), 1681, pp. 1-17. doi.org/10.3390/w11081681

2018
Use of decision tables to simluate management in SWAT+

Arnold, J.G.; Bieger, K.; White, M.J.; Srinivasan, R.; Dunbar, J.A.; Allen, P.M. Use of Decision Tables to Simulate Management in SWAT+. Water 2018, 10, 713. doi.org/10.3390/w10060713

2017
Introduction to SWAT+, a completely restructured version of the Soil and Water Assessment Tool

Bieger, Katrin, Arnold, Jeffrey G., Rathjens, Hendrik, White, Michael J., Bosch, David D., Allen, Peter M., Volk, Martin, and Srinivasan, Raghavan, 2017. Introduction to SWAT+, a Completely Restructured Version of the Soil and Water Assessment Tool. Journal of the American Water Resources Association (JAWRA) 53( 1): 115– 130. doi.org/10.1111/1752-1688.12482

Enhancing the SWAT Model for Simulating Denitrification in Riparian Zones at the River Basin Scale

Hoang, L., A. van Griensven, and A. Mynett. 2017. “Enhancing the SWAT Model for Simulating Denitrification in Riparian Zones at the River Basin Scale.” Environmental Modelling & Software 93: 163–79. doi.org/10.1016/j.envsoft.2017.03.017.

Featured Series Conclusion: SWAT Applications for Emerging Hydrologic and Water Quality Challenges

Merwade, Venkatesh, Baffaut, Claire, Bieger, Katrin, Boithias, Laurie, and Rathjens, Hendrik, 2017. Featured Series Conclusion: SWAT Applications for Emerging Hydrologic and Water Quality Challenges. Journal of the American Water Resources Association (JAWRA) 53( 6): 1390‐ 1392. doi.org/10.1111/1752-1688.12601

Development of a Hydrologic Connectivity Dataset for SWAT Assessments in the US

White, M.J.; Beiger, K.; Gambone, M.; Haney, E.; Arnold, J.; Gao, J. Development of a Hydrologic Connectivity Dataset for SWAT Assessments in the US. Water 2017, 9, 892. doi.org/10.3390/w9110892