• Assessment of Drought Effects on Groundwater System in Rural Area using Standardized Groundwater Level Index(SGI)
  • Song, Sung-Ho;
  • Rural Research Institute, Korea Rural Community Corporation;
  • 표준지하수위지수(SGI)를 이용한 농촌지역 지하수계의 가뭄 영향 평가
  • 송성호;
  • 한국농어촌공사 농어촌연구원;
Abstract
This study is aimed to quantitatively evaluate the effects of drought on groundwater system in rural areas. For this purpose, the standardized groundwater level index (SGI) was used for 68 groundwater monitoring wells. To determine accumulation period (AP) which represents the month with the highest correlation coefficient between SGI and SPI, correlation analysis between the two for 68 wells were peformed. The results indicated the AP values ranged in 1~3 months for most of the well, but it was 7~10 months in some wells. These results can be interpreted such that the total amount of groundwater will not decrease significantly in long-term drought situations unlikely the reservoirs with the high AP values. The nationwide maximum AP values were 4.1 and 4.0 in Chungbuk-do and Gyeongnam-do, while the minimum AP values were 1.8 and 2.0 in Gangwon-do and Chungnam-do, respectively. The maximum and minimum values of correlation coefficient were 0.623 and 0.459 in Gyeongnam-do and Chungnam-do/Chungbuk-do, respectively. Consequently, it could be concluded that the wells with low AP value tend to respond to short-term drought, but it has little effect on groundwater system when the long drought occurs.

Keywords: Standardized groundwater level index (SGI);Standardized precipitation index (SPI);Drought;Groundwater system;Accumulation period (AP);

References
  • 1. Bloomfield, J.P. and Marchant, B.P., 2013, Analysis of groundwater drought building on the standardised precipitation index approach, Hydrol. Earth Syst. Sci., 17, 4769-4787.
  •  
  • 2. Kumar, R, Musuuza, J.L., Van Loon, A.F., Teuling, A.J., Barthel, R., Ten Broek, J., Mai, J., Samaniego, L., and Attinger, S., 2016, Multiscale evaluation of the standardized precipitation index as a groundwater drought indicator, Hydrol. Earth Syst. Sci., 20, 1117-1131.
  •  
  • 3. McEvoy, D. J., Huntington, J. L., Abatzoglou, J. T., and Edwards, L. M., 2012, An evaluation of multiscalar drought indices in Nevada and eastern California, Earth Interact., 16, 1-8.
  •  
  • 4. McKee, T. B., Doesken, N. J., and Leist, J., 1993, The relationship of drought frequency and duration time scales, 8th Conference on Applied Climatology, 17-22 January 1993, Anaheim, California, USA, p.179-184.
  •  
  • 5. Mishra, A. K. and Singh, V. P., 2010, A review of drought concepts, J. Hydrol., 391, 202-216.
  •  
  • 6. NDMC (National Drought Mitigation Center), 2018, http://drought.unl.edu/droughtbasics/typesofdrought.aspx/ [accessed 18.05.21]
  •  
  • 7. RRI (Rural Research Institute, KRC), 2017, Development of Assessment Technology for Agricultural Drought using the Analysis of Real-time Groundwater Data, Ministry of Agriculture, Food and Rural Affairs, p.263.
  •  
  • 8. Sheffield, J., Andreadis, K.M., Wood, E.F., and Lettenmaier, D.P., 2008, Global and continental drought in the second half of the twentieth century: Severity-Area-Duration analysis and temporal variability of large-scale events, J. Climate, 22, 1962-1981.
  •  
  • 9. Shukla, S. and Wood, A.W., 2008, Use of a standardized runoff index for characterizing hydrologic drought, Geophys. Res. Lett., 35, L02405.
  •  
  • 10. Song, S.H., Lee, J.Y., and Yi, M.J., 2007, Evaluation of long-term data obtained from seawater intrusion monitoring network using variation type analysis, J. Korean Earth Sci. Soc., 28(4), 478-490.
  •  
  • 11. Song, S.H., Yoo, S.H., and Bae, S.J., 2013, Regional drought assessment considering climate change and relationship with agricultural water in Jeju Island, J. Environ. Sci. Int., 22(5), 625-638.
  •  
  • 12. Todd, D.K., 1980, Groundwater Hydrology, 2nd ED, John Wiley & Sons, NY, p.535.
  •  
  • 13. Vincente-Serrano, S.M., Begueria, S., and Lopez-Moreno, J.I., 2010, A multiscalar drought index sensitive to global warming: The standardized precipitation evapotranspiration index, J. Climate, 23, 1696-1718.
  •  
  • 14. Vincente-Serrano, S.M. and Lopez-Moreno, J.I., 2005, Hydrological response to different time scales of climatological drought: an evaluation of the Standardized Precipitation Index in a mountainous Mediterranean basin, Hydro. Earth Syst. Sci., 9, 523-533.
  •  
  • 15. Wilhite, D.A. and Glantz, 1985, Understanding the drought phenomenon: The role of definition, Water Int., 10(3), 111-120.
  •  

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