Basin properties: Landcover

The following map will display the aggregated landcover information for each watershed in the database. The landcover information was derived from the NALCMS (250m, 2010) dataset. The datset can be downloaded for free (here). The information was extracted with the PAVICS subsetting tools using the zonal histogram methods and spatially aggregated using the percentage of NALCMS tiles of each group within the catchment polygon.

The map includes switches to display the fractions of:

• forest (NALCMS class 1 to 6)
• grass (NALCMS class 9, 10 to 13, and 16)
• wetland (NALCMS class 14)
• water (NALCMS class 18)
• urban (NALCMS class 17)
• shrubs (NALCMS class 7, 8, and 11)
• crops (NALCMS class 15)
• snow-ice (NALCMS class 19)
• ocean not displayed since zero everywhere on land (NALCMS class 0)

All landcover values are fractions and range between 0 and 1. The definitions of these classes can be found here. The blended Raven model used for the hydrologic simulations only requires the estimate of the forest fraction.