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A new drought monitoring approach

Phys.org/news (APRIL 16, 2021)

Titre : A new drought monitoring approach

A team of researchers, affiliated with UNIST has proposed a satellite-aided drought monitoring method that can adequately represent the complex drought conditions into a single integrated drought index. The newly-proposed drought index has attracted considerable attention as a new method for monitoring and forecasting drought hazards due to its accuracy with no space-time constraints.

Phys.org/news (APRIL 16, 2021)

Présentation
Drought is one of the most complex natural disasters. Therefore, unlike most other natural disasters, it is usually difficult to define the drought onset or drought declaration. For this reason, various drought indices (i.e., drought severity, the area affected, duration, and timing) are used to monitor drought and its risk management. The existing drought indices are tended to be specific to particular types of drought indicators. Therefore, in order to comprehensively investigate drought disasters, we need a more generalized index that is suitable for varied drought conditions.

In this study, three schemes of VPID with different combinations of variables focused on integrated-, short-, and long-term drought (VPIDinte, VPIDshort, and VPIDlong, respectively) were also evaluated over the CONUS and East Asia. According to the research team, all three schemes showed good agreement with both multi-timescale surface-based indices and drought references (USDM and EM-DAT) across the study areas at continental scales.

Source  : Joohyeon Heo, Ulsan National Institute of Science and Technology

Annonce (Phys.org/news)

Page publiée le 14 janvier 2023