Table 6 Moisture indices extracted from spectral data
Variables | Description | Formula | Reference |
|---|---|---|---|
MSI | Moisture stress index | \( \mathrm{MSI}=\frac{R_{1600}}{R_{820}} \) | Gao (1996) |
WI1 | Water index | \( \mathrm{WI}1=\frac{R_{970}}{R_{900}} \) | Hardisky et al. (1983) |
WI2 | Water index | \( \mathrm{WI}2=\frac{R_{950}}{R_{900}} \) | Hardisky et al. (1983) |
NDWI | Normalized difference water index | \( \mathrm{NDWI}=\frac{\left({R}_{860}-{R}_{1240}\right)}{\left({R}_{860}+{R}_{1600}\right)} \) | Prasad et al. (2006) |
NDII | Normalized difference infrared index | \( \mathrm{NDII}=\frac{\left({R}_{860}-{R}_{1600}\right)}{\left({R}_{860}+{R}_{1600}\right)} \) | Verikas et al. (2011) |