• A Comparison of Estimated Groundwater Consumption Using Existing Formulae with Actual Pumped Volumes in the Haean Basin, Korea
  • Ryu, Han-Sun;Jeon, Woo-Hyun;Kwon, Kideok;Lee, Jin-Yong;
  • Department of Geology, Kangwon National University;Department of Geology, Kangwon National University;Department of Geology, Kangwon National University;Department of Geology, Kangwon National University;
  • 양구해안분지에서 기존 농업용수 이용량 산정식에 따른 양수량과 실측 양수량 비교
  • 유한선;전우현;권기덕;이진용;
  • 강원대학교 지질학과;강원대학교 지질학과;강원대학교 지질학과;강원대학교 지질학과;
Abstract
Efficient groundwater management requires accurate information about the water volume used. The pumped volume of groundwater can be indirectly estimated using empirical formulae based on electric power consumption. The purpose of this study is to test the accuracy of this indirect method. The Haean basin in Gangwon is located in a rural area, where majority of the groundwater extracted is used for irrigation. The pumped volume of groundwater indirectly estimated from electricity usage using these empirical formulae was compared with the actual pumped volume determined by conducting experiments on April 29 and May 19, 2017. The field survey collected data on electricity usage, pumped volume, and groundwater levels. Based on this measured data, correlations were calculated between electricity usage and pumping volume, as well as groundwater level and pumping rate. The results show that electricity usage and pumped volume measured for both wells (YHE1 and YHE2) are highly correlated (r=0.99, p<0.001). However, for YHE1, notably, the correlation between the groundwater level and pumping rate was not significant, and only some correlations were identified for these variables for the YHE2 test well. The average error with respect to the estimation of the actual pumped volume from the existing formula (1) and formulae (2) and (3) are +399% and -88%, respectively. To reduce these errors, these formulae need to consider other factors affecting the pumped volume.

Keywords: Groundwater use;Electricity usage;Pumped volume;Groundwater level;Haean basin;

References
  • 1. Choi, H.M. and Lee, J.Y., 2010, Groundwater level distribution and rainfall response characteristics in Haean basin of Yangu, J. Soil Groundwater Env., 15(6), 1-8.
  •  
  • 2. Jeoung, J.H. and Park, S.K., 2003, Calculation of pumping rate considering the change of groundwater level, KCID J., 10(1), 64-72.
  •  
  • 3. Jung, J.H., Hawng, M.S., Park, S.K., and Lee, S.K., 2001, Characteristics of pumping in small tube wells for agricultural, KSAE Conference, 106-109.
  •  
  • 4. Korea Meteorological Administration (KMA), 2017, Automated Weather Station, http://www.kma.go.kr [accessed 17.06.29]
  •  
  • 5. Lee, B.J., Kim, Y.C., Cho, B.W., Yoon, U., Ha, K., Lee, B.D., Moon, S.H., Yoon, P., and Kim, S.Y., 2015, Estimation of groundwater usage for water curtain cultivation using a rating curve, J. Engin. Geol., 25(1), 35-43.
  •  
  • 6. Lee, J.Y., 2009, Importance of hydrogeological and hydrologic studies for Haean basin in Yanggu, J. Geol. Soc. Korea, 45(4), 405-414.
  •  
  • 7. Lee, J.Y. and Han, J.W., 2013, Groundwater use and its perspective in Haean Basin, Yanggu County of Gangwon Province, J. Wetlands Res., 15(2), 179-189.
  •  
  • 8. MOLIT, 2015, Guidelines for Groundwater Operations, MOLIT, Sejong, Korea, p.359.
  •  
  • 9. MOLIT and K-water, 2007, Investigation Report for Monitoring of Groundwater Use, MOLIT and K-water, Daejeon, Korea, p.208.
  •  
  • 10. MOLIT and K-water, 2016, Groundwater Annual Report, MOLIT and K-water, Daejeon, Korea, p.671.
  •  
  • 11. Song, K.Y. and Cho, D.L., 2009, Geological Report of the Mandaeri Sheet, KIGAM, 1-60.
  •  
  • 12. Yun, S.W., Jo, Y.J., and Lee, J.Y., 2009, Comparison of groundwater recharges estimated by waterlevel fluctuation and hydrograph separation in Haean basin of Yanggu, J. Geol. Soc. Korea, 45(4), 391-404.
  •  
  • 13. Yun, S.W., Lee, J.Y., and Lee, H.G., 2015, Variation of stream water quality and baseflow contribution from groundwater during rainfall event in the Haean basin. J. Geol. Soc. Korea, 51(6), 611-621.
  •  

This Article