| Title |
Hydrological Drought Analysis and Monitoring Using Multiple Drought Indices: The Case of Mulrocheon Watershed |
| Authors |
이주헌(Lee, Joo-Heon) ; 박서연(Park, Seo-Yeon) ; 김민규(Kim, Min Gyu) ; 정일문(Chung, Il-Moon) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.5.0477 |
| Keywords |
가뭄; 춘천; SPEI; SDI; WBDI; SDF곡선 Drought; Chuncheon; SPEI; SDI; WBDI; SDF curve |
| Abstract |
Due to climate change, parts of Korea are experiencing large and small droughts every 2?3 years and extreme droughts every 7 years.
Since most droughts occur mainly in areas where small water supply facilities in the tributaries or upstream are located, more research on technology for securing water in these areas is required. In this study, a drought evaluation using SPEI (Standardized Precipitation
Evapotranspiration Index), SDI (Streamflow Drought Index), and WBDI (Water Budget?based Drought Index) was performed to investigate hydrological drought in the Mulrocheon watershed of Chuncheon, a vulnerable area in terms of water supply. As a result of calculating hydrological drought indices SPEI and SDI, examining each duration, it was confirmed that the common drought in 2014 did not recover and continued until 2015. In the hydrological drought index evaluation result by WBDI, a very severe drought condition was observed in the spring of 2015 following 2014, and that drought was the most severe at -1.94 in November 2017. As a result of deriving a SDF (Severity-Duration-Frequency) curve through frequency analysis by duration using the drought index calculated on a monthly basis from 2003 to 2019 (17 years), most droughts in the Mulrocheon watershed were found to have a return period of less than
10 years, but droughts that occurred in 2014, 2015, and 2019 were found to cover more than 20 years, respectively |