Create SWAT Project

Before users can view, edit, save, download, or visualize data, users must first load SWAT project. SwaNET allows users to create SWAT project in three different ways:
1) Upload SWAT project from local computer;
2) Load existing SWAT project from the server; and
3) Select SWAT project by latitide and longitude.

Click buttons below to view specific instruction on how to load SWAT project.

What is it?

Users can upload SWAT project from local computer in two ways: A) Upload SWAT TxtInOut files as a zip file (.zip), and B) Upload SwaNET file (.mgn). These files only contain SWAT input files, and do not contain any shape file. If users want to visualize the watershed as well as the results on the map, watershed shape files (subbasin map and stream network) must be uploaded. Without the shape files, user can run the SWAT model and view time series plot but not the 2D plots.

How to use it:

Interface for uploading local SWAT files is shown below. By default 'Upload MagnetSWAT file' is selected as shown below.
Uploadswatlocal

A. Upload SWAT TxtInOut files
To upload SWAT TxtInOut files, click on 'Import SWAT file (zip) radio button. A new file upload interface is loaded as shown below.
Uploadswatlocaltxtinout

For using the SWAT files already uploaded to the server, click 'Use Uploaded File'. A list of previously uploaded SWAT zip files will be loaded. Select the file to use.
For uploading TxtInOut files from the local computer, check the checkbox next to 'Import' and click 'Import'. Browse to the zip file to upload it. Prior to selecting the TxtInOut files, make sure that the entire TxtInOut folder is zipped. In a SWAT project the files are located in Scenarios\Default\TxtInOut folder.

B. Upload SwaNET file
For uploading SwaNET file from local computer, check 'Upload SwaNET file radio button, and click 'Choose File' button to browse to the SwaNET file. A SwaNET file is a SWAT JSON file with and extension of .mgn, saved previously from SwaNET.
Uploadswatlocalmagnetswat

Upload shape file
User can either use the shape file previously uploaded to the server or can upload a new shape file from local computer.
Uploadswatlocalshape

To use the shape file previously uploaded to the server, click 'Use Uploaded File'. A list of previously uploaded shape file will be displayed. Select the desired shape file to use.
To upload a new shape file, check the check box next to 'Import' and click 'Import'. Browse to the shape file and select it. Prior to uploading shape file, the files must be zipped. The shape files are located in Watershed\Shapes folder inside a SWAT project.

Once the files are uploaded, click 'Next'.

What is it?

Users can choose to load the latest SWAT project from the server if there is an existing SWAT project on the server. This option is for the returning users who want to continue working on previously created SWAT project.

How to use it:

To load the latest SWAT project from the server, simply click 'Next' on the 'Load Latest SWAT Project From the Server' option.
Uploadswatlocalserver

What is it?

Users can load SWAT project by simply clicking on the map. The SWAT projects correspond to the HUC8 watersheds in the US. For the rest of the world, the SWAT projects correspond to the hydrological basins from FAO Geonetwork. For details on SWAT project creation process, please click 'Pre-processed SWAT projects at MagnetSWAT'.

How to use it:

Move the mouse over the map. Current latitude/longitude is continuously updated on the interface as shown below. The map can be zoomed in/out by scrolling the mouse.
Uploadswatlatlong

Once the area of interest is identified, click on the location. The location is locked and displayed at latitude and longitude boxes. The selected latitude/longitude can be changed any time by clicking another location. Currently, only one level of watershed maps are available at MagnetSWAT, so 'Select watershed level' has been disabled.
Once the location is selected, click 'Next'.

What is it?

SWAT projects on SwaNET are pre-processed SWAT projects that covers all the continents except Antarctica. For the US, watershed area corresponds to the HUC8 watersheds. For the rest of the world, the SWAT projects correspond to the hydrological basins from FAO Geonetwork.

Data sources
DEM: ASTER Global Digital Elevation Model V3
Stream network: National Hydrography Dataset High Resolution data (NHDPlus) (US only)
Land use map: National Land Cover Database (NLCD) 2016 (US)
USGS Global Land Cover Characterization (GLCC) database (obtained from https://swat.tamu.edu/data/)(outside US)
Soil map: US General Soil Map (STATSGO2) (US)
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Version 3.6 (obtained from https://swat.tamu.edu/data/)(outside US)
Weather generator: US first order weather generator (US)
Climate Forecast System Reanalysis (CFSR) obtained from https://swat.tamu.edu/data/)(outside US)

Watershed delineation process
All the watersheds were delineated using QSWAT 1.9 in QGIS 2.6.1. For the US, existing stream network (NHDPlus) were used by selecting 'Burn in existing stream network' option. The threshold for creating stream network was 1/3rd of the default value to obtain reasonable number of subbasins in each watershed. Watershed outlets were drawn manually to best represent the HUC8 watersheds (US) or FAO hydrological basins. Reservoirs and point sources were added to each of the subbasins.

HRU creation
DEM was analyzed for slope and based on slope distribution, each watershed was divided into 5 slope classes for use in HRU delineation. Nuber of HRU were based on 'Target number of HRU' with the HRU number five times the number of subbasins.