Developing a Combined Drought Index to Monitor Agricultural Drought in Sri Lanka by Yared Bayissa, Raghavan Srinivasan, George Joseph, Aroha Bahuguna, Anne Shrestha, Sophie Ayling, Ranjith Punyawardena, K. D. W. Nandalal

“…The principal component analysis (PCA) approach was employed to qualitatively determine the grid-based percentage contribution of each input parameter. …”
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