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How Can I Calculate EDI(Effective Drought Index)?

Byun and Wilhite (1999) developed the EDI. It is the only index that was specifically designed to calculate daily drought severity. For detailed explanations, please refer to Byun and Wilhite (1999). The "drought range" of the EDI indicates extreme drought at EDI less than -2, severe drought at EDI between -2 and -1.5, and moderate drought at EDI between -1.5 and -1.0. Near normal conditions are indicated by EDI between -1 and 1.0. You can calculate by Rain besed Drought Indices Tool easily.

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kisoo (parkks3507@nate.com):
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kisoo (parkks3507@nate.com):
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