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Parametric and Non-parametric Trend Analysis of Groundwater Data Obtained from National Groundwater Monitoring Stations  

Lee, Jin-Yong (GeoGreen21 Co., Ltd.)
Yi, Myeong-Jae (GeoGreen21 Co., Ltd.)
Lee, Jae-Myeong (Groundwater Investigation Section, KOWACO)
Ahn, Kyoung-Hwan (Groundwater Investigation Section, KOWACO)
Won, Jong-Ho (Groundwater Investigation Section, KOWACO)
Moon, Sang-Ho (Groundwater & Geothermal Resources Division, KIGAM)
Cho, Min-Joe (Groundwater & Geothermal Resources Division, KIGAM)
Publication Information
Journal of Soil and Groundwater Environment / v.11, no.2, 2006 , pp. 56-67 More about this Journal
Abstract
Trends of variation in groundwater levels, electrical conductivities and water temperatures obtained from the national groundwater monitoring stations (95 shallow and 169 deep wells) of Korea were evaluated. For the analysis, both parametric (linear regression) and non-parametric (Mann-Kendall test, Sen's test) methods were adopted. Results of linear regression analysis indicated that about 50% of the monitoring wells showed increasing trends of groundwater levels, electrical conductivities, and water temperatures and the others showed decreasing trends. However, the non-parametric analyses with monthly median values revealed that $14.8{\sim}20.0%$ of water levels were decreased, $24.2{\sim}36.9%$ of electrical conductivities were increased, and $27.4{\sim}32.5%$ of water temperatures were increased at a confidence level of 99%. Highly proportions of increasing or decreasing trends were unexpected and they resulted from the relatively short term of data collection (maximum 6 years). Meanwhile, the investigation of groundwater around the national groundwater monitoring stations showed that the decreasing or increasing trends of water levels, electrical conductivities, themselves, didn't indicate directly groundwater hazards such as groundwater depletion or groundwater contamination. Both the values and variation rates (slopes) of water level, electrical conductivity and temperature in the longer period are considered simultaneously. This study is the first comprehensive work in analyzing trends of groundwater data obtained from the national groundwater monitoring stations. Based on this study, the periodical and regular analysis of groundwater data is essentially required to grasp the overall variational trend of groundwater resources in the country.
Keywords
National groundwater monitoring stations; Non-parametric trend analysis; Groundwater level; Confidence level;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Lee, J.Y., Yi, M.J., Lee, J.M., Ahn, K.H., Won, J.H., Moon, S.H., and Cho, M., 2006c, Causes of substantial water-level decline at a national groundwater monitoring station in Daegu, Korea, Quar. J. Eng. Geol. Hydrogeol. (Submitted)
2 Lee, J.Y., Yi, M.J., Song, S.H., and Lee, G.S., 2005d, Monitoring of seawater intrusion in Korea: analysis of data for 1998- 2004, Water Int. (submitted)
3 Mann, H.B., 1945, Nonparametric tests against trend, Econometrica, 13, 245-259   DOI   ScienceOn
4 Salmi, T., Maatta, A., Anttila, P., Ruoho-Airola, T., and Amnell, T., 2002, Detecting Trends of Annual Values of Atmospheric Pollutants by The Mann-Kendall Test and Sen's Slope Estimates -The Excel Template Application Makesens, Finnish Meteorological Institute, Helsinki, p. 35
5 Sen, P.K., 1968, Estimates of the regression coefficient based on Kendall's tau, J. Amer. Stat. Assoc., 63, 1379-1389   DOI
6 Moon, S.K., Woo, N.C., and Lee, K.S., 2004, Statistical analysis of hydrographs and water-table fluctuation to estimate groundwater recharge, J. Hydrol., 292, 198-209   DOI   ScienceOn
7 한정상, 한규상, 한혁상, 한찬, 2004, 친환경, 대체에너지인 천부 지중열을 이용한 지열펌프 냉난방 시스템, 한림원, 서울, p. 14-69
8 Kim, G.B., 2005, Nationwide Monitoring and Assessment of Groundwater in Korea, Ph.D. thesis, Seoul National University, Seoul, Korea, p. 391
9 Gilbert, R.O., 1987, Statistical Methods for Environmental Pollution Monitoring, Van Nostrand Rienhold Company, Inc., New York, p. 127
10 Lee, J.Y., Won, J.H., and Hahn, J.S., 2006a, Evaluation of hydrogeologic conditions for groundwater heat pumps: analysis with data from national groundwater monitoring stations, Geosci. J., 10, 91-99   DOI   ScienceOn
11 Yue, S. and Wang, C.Y., 2002, Discussion: a study of variability of annual river flow of the southern African region, Hydrol. Sci. J., 47, 983-989   DOI
12 Lee, J.Y. and Hahn, J.S., 2006, Characterization of groundwater temperature obtained from the Korean national groundwater monitoring stations: implications for heat pumps, J. Hydrol. (in press)
13 이명재, 김규범, 손영철, 이진용, 이강근, 2004, 국가 지하수관측 소 지하수위 자료에 대한 시계열분석 연구, 지질학회지, 40, 305- 329
14 Box, G.E.P. and Jenkins, G.M., 1976, Time Series Analysis: Forecasting and Control, Holden-Day, San Francisco, p. 531
15 이명재, 이진용, 김규범, 원종호, 2005, 국가지하수 관측소 측정 자료의 이상값 분석, 지하수토양환경, 10, 65-74   과학기술학회마을
16 Hamed K.H. and Rao A.R., 1998, A modified Mann-Kendall trend test for autocorrelated data, J. Hydrol., 204, 182-196   DOI   ScienceOn
17 Lee, J.Y., Yi, M.J., Yoo, Y.K., Ahn, K.H., Kim, G.B., and Won, J.H., 2006b, A review of national groundwater monitoring network (NGMN) in Korea, Hydrol. Proc. (in press)
18 Kendall, M.G., 1975, Rank Correlation Methods, Charles Griffin, London, p. 202