• RCH Model Outputs
• Sub Model Outputs
• LULC Data
• Soil Data
• nasaaccess
• Data Cart

RCH data is not available for the selected watershed

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SUB data is not available for the selected watershed

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Currently under development

LULC data is not available for the selected watershed

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Currently under development

Soil data is not available for the selected watershed

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Currently under development

nasaaccess is not available for the selected watershed

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Select NASAaccess Functions

	Function	Information
	GLDAS Poly Centroid	Generate air temperature input files from NASA GLDAS modeled remote sensing products at polygon centroid.
	GLDAS SWAT	Generate SWAT air temperature input files from NASA GLDAS modeled remote sensing products within watershed boundaries.
	GPM Poly Centroid	Generate rainfall input files from NASA GPM/TRMM remote sensing products at polygon centroid.
	GPM SWAT	Generate SWAT rainfall input files from NASA GPM/TRMM remote sensing products within watershed boundaries.
	NEX-GDPP	Generate SWAT rainfall or air temperature input files as well as climate input stations file from NASA NEX-GDPP remote sensing climate change data products.

Timeseries data available for download

Data Type	Parameters	Time Step	Start Date	End Date	Stream/Basin ID

Spatial data available for download

Data Type	File Type	Outlet Stream ID

The Lower Mekong Hydrological Decision Support system is a web application for visualizing and sharing inputs/outputs from the Soil and Water Assessment Tool (SWAT). It is currently being developed by a team at NASA Goddard Space Flight Center as part of a NASA-SERVIR Applied Science grant in the Lower Mekong region.

The following steps highlight the several functions of the SWAT Data Viewer web app

1. In the left navigation panel, select a watershed to view
2. Select a stream or subbasin from the map
3. Explore the SWAT model inputs and outputs
   • Select a Variable (or multiple)
   • Select start and end dates
   • Click the "Get {RCH or SUB} Data" button to query the model outputs for the selected parameters
   • Click the "Add Data to Cart" to add a .csv file of the time-series to data cart for downloading
4. View land use and soil coverage information
   • Click the "Clip {LULC or SOIL} Raster" to view the land cover and soil within the contributing area to the selected stream or subbasin
   • Click the "Compute {LULC or SOIL} Statistics" to view a pie chart depicting the coverage distribution of different land cover and soil classes
5. Access GPM (precipitation) and GLDAS (air temperature) data products from NASA
   • Select a date range
   • Select at least one of the nasaaccess functions
   • Click the "Run nasaaccess" button
   • Provide an email address for the app to contact you when the data is ready and click "Submit"
   • Navigate the the nasaaaccess web application (in the same app portal) to download the data
6. Download data
   • Time-series data will be in csv form
   • Upstream subbasin and stream layers are GeoJSON files
   • Upstream land cover and soil layers are TIFF files
7. Click 'X' in the top-right of the app to return to the Main Apps Library
8. External Resources and Links:
   • About the SWATOnline Visualization tool, the Lower Mekong SWAT model data and NASAaccess tool
   • About SERVIR-Mekong
   • Privacy and Terms of Conditions
   • View Code

If you have questions, comments, or requests for further functionality please contact Githika Tondapu at githika.tondapu@nasa.gov