SWAT Model:  http://swatmodel.tamu.edu/

Waterbase:  http://www.waterbase.org/ (for mapwindow SWAT and global datasets of landuse and soil)

SRTM DEM: http://srtm.csi.cgiar.org/

ASTER DEM: http://www.ersdac.or.jp/GDEM/E/1.html

IMD_GRIDDED_Weather: Gridded data published by IMD was processed into SWAT format

CAUTION:
These DEM datasets are in "Geographic Coordinate System".  You need to extract the data for your area of interest and then convert these data into a "Project Coordinate system" before using in SWAT interface.

Project system recommended:

If your study area is small, then we recommend using UTM projection for the corresponding zone
with WGS 1984 as the spheroid

For large study area that may span multiple UTM zone, we recommend using the standard projection used
by National Remote Sensing Centre (NRSC), Hyderabad and ISRO as follows:

Projection: Lambert Conformal Conic 
Linear Unit: Meter
False Easting: 4000000
False Northing:4000000
Central Meridian: 80
Standard Parallel 1: 35.172805555556
Standard Parallel 2: 12.472944444
Latitude of Origin: 24
Datum: WGS 1984

DISCLAIMER:
These datasets are provided as such to you for your convenient usage and reference.  Kindly check the accuracy of these datasets for your area of interest before its usage.

Contact:
Dr. Balaji Narasimhan
Associate Professor
EWRE-29, Department of Civil Engineering
Indian Institute of Technology-Madras
Chennai - 600 036.  Tamil Nadu. INDIA.

Phone : +91-44-2257 4293 | Fax: +91-44-2257 4252
E-mail: nbalaji@iitm.ac.in; nbalaji.iitm@gmail.com