Variable Summary Statistic Data Source Correlation Coefficient Correlation Coefficient
Na+ NO3-
Topographic Watershed area value at sampling point Whitebox flow accumulation tool 0.12 -0.03
Slope watershed mean Whitebox slope tool 0.27 -0.32
Elevation watershed mean 10-m digital elevation model -0.23 -0.27
Riparian extent % of watershed area Whitebox elevation above stream tool 0.24 -0.01
TWI watershed mean Whitebox twi tool -0.33 0.14
Vegetation Tree cover watershed mean Rangeland Analysis Platform 0.15 -0.5
Shrub cover watershed mean Rangeland Analysis Platform -0.24 0.15
Bare ˣ watershed mean Rangeland Analysis Platform -0.12 0.44
NDMI watershed mean Climate Engine 0.09 -0.67
NDVI ˣ watershed mean Climate Engine 0.05 -0.64
EVI ˣ watershed mean Climate Engine -0.02 -0.62
Fire Burn extent % of watershed area MTBS -0.24 0.43
dNBR ˣ watershed mean MTBS -0.26 0.37