1Load landuse map
Landuse maps can be either loaded from Magnet server or uploaded from local computer or from DataNet.
Load landuse map from Magnet server
a. To load landuse map from Magnet server, check ‘Upload from Magnet server’ under ‘Select landuse map’. This is the default method.
b. Next, select the resolution of the landuse map. Landuse maps are available at 400m at the global scale, while 30m National Land Cover Database (NLCD) are available for the US. Please refer to https://swat.tamu.edu/data/ for the global landuse map description. Please refer to https://www.mrlc.gov/data/legends/national-land-cover-database-class-legend-and-description for NLCD data description. Select the appropriate resolution c. Click ‘Upload’. Selected landuse map and associated landuse lookup tables are loaded to the SwaNET project, plotted and displayed on the map. Please not that the loaded landuse map might be different from the one shown in Figure 4.
To view the map legend, click ‘Manage maps’ button on the left, and check ‘Land use’ under ‘Show legend’.
Upload landuse map from local computer
Upload a new landuse map: a. Check ‘Upload user landuse map’ under ‘Select landuse map’. The interface expands.
b. Check the box on the left of ‘Import’ and click ‘Import’. Browse to the file location, select the file, and click ‘Open’. The selected file is uploaded to the Magnet server, and the file name is displayed. Next upload the landuse lookup table. c. Under ‘Upload landuse lookup table’, check ‘User landuse lookup table’. Check the box and click ‘Import’. Browse to the file location, select the file, and click ‘Open’. The selected file is uploaded to the Magnet server, and the file name is displayed. Landuse lookup table is a comma separated file containing raster value and landuse code. as shown in Figure 6. If using previously uploaded lookup table, click on ‘Use Uploaded File’, a list of previously uploaded files is displayed. Select the appropriate lookup file.
Please note that if the landuse map is NLCD (National Land Cover Database) map or Crop Data Layer (CDL), users do not need to upload the lookup table; just check the appropriate option provided. d. Click ‘Upload’. Selected landuse map and associated landuse lookup tables are loaded to the SwaNET project, plotted and displayed on the map, as shown in Figure 4. Please not that the loaded landuse map might be different from the one shown in Figure 4. To view the map legend, click ‘Manage maps’ button on the left, and check ‘Land use’ under ‘Show legend’.
Upload landuse map from DataNet
Landuse map can also be uploaded from DataNet, a Magnet platform for visualizing and downloading raster/vector data from GeoServers. a. Click ‘Upload from DataNet’. If clicking for the first time, a prompt appears warning that no DataNet page found. Click ‘OK’. DataNet page opens in a new tab with login prompt. Close the login prompt, go to the MAGNET SwaNET page and click ‘Upload from DataNet’ one more time.
b. Go to the DataNet interface. The map zooms to the current model area. Click ‘Show Layers’ from the top menu.
c. Click on the ‘>’ sign next to ‘Data Space ?’ to expand the search interface. Lets load NLCD landuse map for Kalamazoo river watershed in Michigan, USA as an example. d. Under ‘Enter keywords….’, type ‘Michigan_Landuse’. e. Under ‘Filter Category’, uncheck all except ‘WCS’. f. Click ‘Get Layers’. Available raster maps are listed. g. From the list below, check the checkbox next to ‘USA Michigan Michigan_Landuse’. h. Click ‘Data Manipulation’ from the top menu and click ‘Transfer’. Data transfer interface appears.
i. Select ‘WCS’ from the dropdown list next to ‘Services’. j. Click ‘Send’. A message showing ‘Data Transferred’ appears. Click ‘OK’. k. Go to the MAGNET SwaNET interface. A message appears asking whether to receive data. Click ‘OK’. l. Another warning appears asking whether to overwrite existing DataNet imported landuse map. Click ‘OK’. The landuse map is uploaded to the server and the file name is displayed. Click OK. m. Follow similar steps in previous section to upload landuse lookup table. n. Click ‘Upload’. Selected landuse map and associated landuse lookup tables are loaded to the SwaNET project, plotted and displayed on the map, as shown in Figure 4. Please note that the loaded landuse map might be different from the one shown in Figure 4.
2Load soil map
Soil maps can be either loaded from Magnet server or uploaded from local computer or from DataNet.
Load landuse map from Magnet server
a. To load soil map from Magnet server, check ‘Upload from Magnet server’ under ‘Select soil map’. This is the default method.
b. Next, select the resolution of the soil map. Soil maps are available at 400m at the global scale, while 30m SSURGO maps are available for the US. Please refer to https://swat.tamu.edu/data/ for the global landuse map description. Please refer to https://www.nrcs.usda.gov/resources/data-and-reports/soil-survey-geographic-databasessurgo#:~:text=The%20Soil%20Survey%20Geographic%20Database,samples%20were%20analyz ed%20in%20laboratories for SSURGO data description. Select the appropriate resolution c. Click ‘Upload’. Selected soil map and associated soil lookup tables are loaded to the SwaNET project, plotted and displayed on the map. Please note that the loaded soil map might be different from the one shown in Figure 11.
To view the map legend, click ‘Manage maps’ button on the left, and check ‘Soil’ under ‘Show legend’.
Upload soil map from local computer
Upload a new soil map: a. Check ‘Upload user soil map’ under ‘Select soil map’. The interface expands.
b. Check the box on the left of ‘Import’ and click ‘Import’. Browse to the file location, select the file, and click ‘Open’. The selected file is uploaded to the Magnet server, and the file name is displayed. Next upload the soil lookup table. c. Under ‘Upload soil lookup table’, check ‘User landuse lookup table’. Check the box and click ‘Import’. Browse to the file location, select the file, and click ‘Open’. The selected file is uploaded to the Magnet server, and the file name is displayed. Soil lookup table is a comma separated file containing detail information on each soil type and layers. If using previously uploaded lookup table, click on ‘Use Uploaded File’, a list of previously uploaded files is displayed. Select the appropriate lookup file. Please note that if the landuse map is SSURGO or STATSGO2, users do not need to upload the lookup table; just check the option provided. d. Click ‘Upload’. Selected soil map and associated soil lookup tables are loaded to the SwaNET project, plotted and displayed on the map, as shown in Figure 11. Please not that the loaded soil map might be different from the one shown in Figure 11. To view the map legend, click ‘Manage maps’ button on the left, and check ‘Soil’ under ‘Show legend’.
Upload soil map from DataNet
Soil map can also be uploaded from DataNet, a Magnet platform for visualizing and downloading raster/vector data from GeoServers. a. Click ‘Upload from DataNet’. If clicking for the first time, a prompt appears warning that no DataNet page found. Click ‘OK’. DataNet page opens in a new tab with login prompt. Close the login prompt, go to the MAGNET SwaNET page and click ‘Upload from DataNet’ one more time.
b. Go to the DataNet interface. The map zooms to the current model area. Click ‘Show Layers’ from the top menu.
c. Click on the ‘>’ sign next to ‘Data Space ?’ to expand the search interface. Lets load STATAGO2 soil map for Kalamazoo river watershed in Michigan, USA as an example. d. Under ‘Enter keywords….’, type ‘STATSGO2Soil’. e. Under ‘Filter Category’, uncheck all except ‘WCS’. f. Click ‘Get Layers’. Available raster maps are listed. g. From the list below, check the checkbox next to ‘United States STATSGO2Soil(USA)’. h. Click ‘Data Manipulation’ from the top menu and click ‘Transfer’. Data transfer interface appears.
i. Select ‘WCS’ from the dropdown list next to ‘Services’. j. Click ‘Send’. A message showing ‘Data Transferred’ appears. Click ‘OK’. k. Go to the MAGNET SwaNET interface. A message appears asking whether to receive data. Click ‘OK’. l. Another warning appears asking whether to overwrite existing DataNet imported soil map. Click ‘OK’. The soil map is uploaded to the server and the file name is displayed. Click OK. m. Follow similar steps in previous section to upload soil lookup table. n. Click ‘Upload’. Selected soil map and associated soil lookup tables are loaded to the SwaNET project, plotted and displayed on the map, as shown in Figure 11. Please not that the loaded landuse map might be different from the one shown in Figure 11.
3Select slope bands
In SwaNET, HRUs (Hydrologic Response Units) are created based on landuse, soil and slope bands. By default, four slope bands are provided. a. To manually enter new band, enter a new slope and click ‘Insert’. To clear the whole class list, click ‘Clear’. Because SwaNET requires defined slope bands, 0 and 9999 is always retained. User can define any slope bands between these two numbers.
4Create HRUs
a. Once the soil and landuse maps have been uploaded and slope bands have been defined, click ‘Create HRUs’. HRUs are the smallest spatial units within a watershed and share similar landuse, soil and slope. A full potential HRU map is created and overlayed on to the background map.