Comparison of Meteorological Drought and Hydrological Drought Index

Abstract

In this study, meteorological drought indices were examined to simulate hydrological drought. SPI (Standardized Precipitation Index) and SPEI (Standardized Precipitation Evapotranspiration Index) was applied to represent meteorological drought. Further, in order to evaluate the hydrological drought, monthly total inflow and SDI (Streamflow Drought Index) was computed. Finally, the correlation between meteorological and hydrological drought indices were analyzed. As a results, in monthly correlation comparison, the correlation between meteorological drought index and monthly total inflow was highest with 0.67 in duration of 270-day. In addition, a meteorological drought index were correlated 0.72 to 0.87 with SDI. In compared to the annual extremes, the relationship between meteorological drought index and minimum monthly inflow was hardly confirmed. But SDI and SPEI showed a slightly higher correlation. There are limitation that analyze extreme hydrological drought using meteorological drought index. For the evaluation of the hydrological drought, drought index which included inflow directly is required.

Characteristics of the Han River Basin drought using SPEI and RDI

“…각각의 가뭄은 목적에 따라 여러 지수들로 분석되고 있다. 가뭄에 따른 피해 에 대응하고 관리하기 위하여 전 세계적으로 SPI (Standardized Precipitation Index; Mckee et al, 1993), SPEI (Standardized Precipitation Evapotranspiration Index; Vicente-Serrano et al, 2010), SDI (Streamflow Drought Index; Nalbantis, 2008), PDSI (Palmer Drough Severity Index;Palmer, 1965), SWSI (Surface Water Supply Index; Shafer and Dezman, 1982), Streamflow drought severity-durationfrequency (SDF) curve (Sung and Chung, 2014) Pisani et al, 1998;Heim, 2002;Keyantash and Dracup, 2002;Lee, et al, 2015 (Morid et al, 2006;Smakhtin and Hughes, 2007;Banimahd and Khalili, 2013…”

Deciphering the relationship between meteorological and hydrological drought in Ben Tre province, Vietnam

“…Although several research found no association between meteorological and hydrological droughts, numerous investigations have shown a link, for example in Korea. (Lee et al 2015), and in the West Sterea Hellas Water District in Greece (Nalbantis and Tsakiris 2009). Moreover, a linear function of SPI was discovered to predict SDI with sufficient accuracy to characterize drought severity (Nalbantis and Tsakiris 2009).…”

Drought Assessment Using Standardized Precipitation Evapotranspiration Index, Standardized Precipitation Index and Soil Available Water Content

“…가뭄 모니터링 방법, 가뭄의 크기, 지속기간, 강도 등 가뭄 정량화와 특성을 판단하는 기준은 연구자, 재난 관리담당자 및 기관마다 다를 수 있다. 특히 가뭄을 정량적인 값으로 산정하고 평가하는 것은 다양한 수문기상학적 변 수와 조합방식에 따라 달라진다 (Tsakiris et al, 2007;Lee et al, 2015).…”

“…최근에는 단일 가뭄지수의 활용에 의존하기 보다, 여러 가뭄지수 간의 특징과 장단점을 상호보완한 연구를 권하고 있다 (Lee et al, 2015;Nam et al, 2017) Chen and Sun, 2015; Kingston et al, 2015;Potopova et al, 2016;Zhao et al, 2017).…”