Flash drought risk assessment over China and Korea using Evaporative Demand Drought Index (EDDI)
Abstract
Drought is a climatic complex phenomenon that is difficult to describe accurately because its definition is a combination of both the spatio-temporal physical variabilities and its consequences. Although various drought indices have been developed to objectively quantify its characteristics in terms of intensity, severity, duration, onset, and spatial extent, it is difficult to create a uniform definition for drought condition that applies to all drought risks such as the meteorological, hydrological, and agricultural impacts. Effective drought management depends on carefully selecting drought indices that appropriately address the different drought criteria of drought severity and associated with drought responses. Recent widespread, extreme, and long-lasting droughts in East Asia have heightened interest in how to better and quickly monitor drought and its impacts for government decision-makers. The new Evaporative Demand Drought Index (EDDI) was developed exclusively to monitor physically-based atmospheric evaporative demand, as well as provide early warning for rapidly-evolving drought events, commonly called "flash droughts", to significantly improve the timeliness for disaster preparation measures. In this research, meteorological data over China and Korea were collected to calculate the widely-used drought indices, including the Standardized Precipitation Index (SPI), the Standardized Precipitation Evapotranspiration Index (SPEI), the Self-Calibrated Palmer Drought Severity Index (SC-PDSI), and the Effective Drought Index (EDI). These drought indices were compared with observed drought damaged areas and EDDI for characterizing flash droughts in these regions.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.H51G1391N
- Keywords:
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- 1812 Drought;
- HYDROLOGYDE: 1816 Estimation and forecasting;
- HYDROLOGYDE: 1817 Extreme events;
- HYDROLOGYDE: 1833 Hydroclimatology;
- HYDROLOGY