Preprint Article Version 1 NOT YET PEER-REVIEWED

Analysis of Drought Characteristics using Time Series of Modified SPEI in South Korea from 1981 to 2010

  1. Institute of Green Bio Science Technology, Seoul National University, Pyeongchang, Republic of Korea
  2. Biological and Agricultural Engineering, Texas A&M University, College station, Texas, USA
  3. Department of Rural and Bio-Systems Engineering, Chonnam National University, Gwangju, Republic of Korea
  4. Institute on the Environment, University of Minnesota, Saint Paul, Minnesota, USA
Version 1 : Received: 6 October 2016 / Approved: 6 October 2016 / Online: 6 October 2016 (13:04:49 CEST)

How to cite: Bae, S.; Lee, S.; Yoo, S.; Kim, T. Analysis of Drought Characteristics using Time Series of Modified SPEI in South Korea from 1981 to 2010. Preprints 2016, 2016100013 (doi: 10.20944/preprints201610.0013.v1). Bae, S.; Lee, S.; Yoo, S.; Kim, T. Analysis of Drought Characteristics using Time Series of Modified SPEI in South Korea from 1981 to 2010. Preprints 2016, 2016100013 (doi: 10.20944/preprints201610.0013.v1).

Abstract

The aim of this study is to analyze the characteristics of drought such as intensity, cumulative curves and trends, based on SPEI (Standardized Precipitation Evapotranspiration Index) at 8 stations in Korea from 1981 to 2010. The traditional SPEI is based on Thornthwaite equation for estimating evapotranspiration; SPEI_th. However, a standard of agricultural water management in Korea suggests FAO Penman-Monteith equation; SPEI_pm. In this study, we analyzed the intensity and trends of drought using SPEI_th and SPEI_pm, respectively, and analyzed the relationship between them. Both of central and southern region, the SPEIs were below -1.0 (moderated drought) for the periods May-August in the representative drought year such as 1988, 2001, and 2008-09. The frequency of drought was higher in southern region than central region. In addition, SPEI_pm showed slightly more intensive drought rather than SPEI_th except for Chuncheon and Gwangju. In 5 stations except for Cheoncheon, Gwangju and Jinju, the cumulative probability that SPEI_pm is below -1.5 was significantly increased from 1981-1995 to 1996-2010. As the results of drought trends, the increasing trend of SPEIs was shown on fall season, and the cumulative probability that SPEI_pm is below -1.5 was also significantly increased.

Subject Areas

drought; SPEI; evapotranspiration; Thornthwaite; FAO Penman-Monteith

Readers' Comments and Ratings (0)

Discuss and rate this article
Views 151
Downloads 124
Comments 0
Metrics 0
Discuss and rate this article

×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.