Evaluation of Typical Spectral Vegetation Indices for Drought Monitoring in Cropland of the North China Plain.

Spectral vegetation index (SVI) is indispensable for comprehensively monitoring of agricultural drought based on remote sensing. Greenness sensitive (e.g., normalized difference vegetation index) and water sensitive SVIs (e.g., normalized difference infrared index) were mostly concerned in drought monitoring. Their sensitivity to drought conditions has been explored yet distinct results were found...