A Junagadh Agricultural University Initiative

NDVI (Normalized Difference Vegetation Index)

< 0.0 Water / Cloud / Non-vegetated
0.0 – 0.2 Barren / Sparse vegetation
0.2 – 0.4 Stressed vegetation
0.4 – 0.6 Moderate vegetation
0.6 – 0.8 Dense vegetation
> 0.8 Very dense vegetation

NDWI (Normalized Difference Water Index)

< 0.0 Dry / Bare Soil / Built-up
0.0 – 0.2 Slightly moist
0.2 – 0.4 Moderately moist
0.4 – 0.6 Moist
0.6 – 0.8 Water presence
> 0.8 Deep water / Wetland

Rainfall Deviation (%)

< –80 Exceptionally Deficient
-80 to –60 Extremely Deficient
–60 to –40 Severe Deficit
–40 to –20 Moderate Deficit
–20 to +20 Normal
+20 to +60 Above Normal
+60 to ≤80 Excess Rainfall
> +80 Heavy Excess

SPI (Standardized Precipitation Index)

<= –2.0 Extreme Drought
–2.0 to –1.5 Severe Drought
–1.5 to –1.0 Moderate Drought
–1.0 to +1.0 Near Normal
+1.0 to +1.5 Moderately Wet
+1.5 to +2.0 Very Wet
>= +2.0 Extremely Wet

Dry Spell Index (0–15) Color Coding

0 – 1 No dry spell / Very wet
1 – 3 Mildly wet / Normal
3 – 5 Slight dry spell
5 – 7 Moderate dry spell
7 – 9 Strong dry spell
9 – 12 Severe dry spell
12 – 15 Extreme dry spell

Indices

This web-based platform is developed through a collaborative effort between the Research, Testing, and Training Centre (RTTC), Junagadh Agricultural University, Junagadh; the Department of Soil and Water Conservation Engineering, CAET, Anand Agricultural University, Godhra; and the Indian Institute of Soil and Water Conservation, Research Centre, Vasad. The project is funded by the National Agricultural Science Fund (NASF) under the Indian Council of Agricultural Research (ICAR), New Delhi.

Junagadh Agricultural University

+91-285-2672080-90

rttc@jau.in

Junagadh Agricultural University, Junagadh 362 001, Gujarat (INDIA)