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2025 Vol.35, Issue 3 Preview Page

Research Article

Using Radon Analysis to Determine the Aquifer Geology at the Saemtong Spring in Cheorwon, Hantangang River UNESCO Global Geopark: A Case Study of the Water Spider Habitat in Yeoncheon

라돈 분석을 통한 한탄강 지질공원 내 철원 샘통 대수층 기원 추정 및 연천 물거미 서식지 사례 연구

Han-Sun Ryu1
,
Jinah Moon1
,
Woo-Bin Jun2
,
Heejung Kim3*
유 한선1
,
문 진아1
,
전 우빈2
,
김 희정3*
1Ph.D. Candidate, Department of Geology, Kangwon National University
2B.Sc. Graduate Student, Department of Geology, Kangwon National University
3Professor, Department of Geology, Kangwon National University
1강원대학교 지질학과 박사수료
2강원대학교 지질학과 이학사
3강원대학교 지질학과 교수
*Corresponding Author
30 September 2025. pp. 395-408
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Abstract

This study aimed to identify the origin of aquifer water in the Hantangang River UNESCO Global Geopark based on radon concentrations, with a focus on the Saemtong Spring at Cheorwon and also analyzing the Eundae-ri Water Spider Habitat at Yeoncheon as a comparative case study to validate the findings. To this end, we conducted an integrated analysis of field water quality characteristics (temperature, pH, EC, DO, ORP), major ion concentrations, stable isotopes (δ18O-δD), radon concentrations, and core data (ST-1, ST-3, 21YD-02, 21YD-04). Groundwater in the Cheorwon area is divided into two types based on radon concentrations. Samples CSG1 and CSG2 are Na-HCO3 type water and exhibit high radon concentrations of 100,000–1,000,000 Bq/m3, indicating a granitic aquifer origin. In contrast, samples CSG3 and CSG4, along with the samples from Saemtong, are Ca-HCO3 type water and have lower radon concentrations of 1,000–10,000 Bq/m3, consistent with a basaltic aquifer origin. These interpretations are supported by core data: core ST-1 contains an ~84 m thick basalt layer underlain by granite, while core ST-3 contains granite bedrock below 16 m depth. Groundwater samples from Eundae-ri (EDG3, EDG4) have radon concentrations of 1,000–20,000 Bq/m3, comparable to the samples from the basaltic aquifer at Saemtong. The wetland samples have much lower concentrations of 50–500 Bq/m3, reflecting atmospheric exposure and mixing with surface water. Cores 21YD-02 and 21YD-04 contain basaltic bedrock overlain by silty and gravelly mud deposits, further confirming the basaltic aquifer origin of the groundwater. These findings demonstrate that radon concentrations can be used to identify aquifer origins and quantify groundwater resources in the Hantangang River UNESCO Global Geopark.

Keywords
Radon analysis
Aquifer origin
Hydrogeochemistry
Hantangang River UNESCO Global Geopark
Basalt and granite aquifer

본 연구는 라돈 농도를 핵심 지시자로 활용하여 한탄강 지질공원 내 철원 샘통의 대수층 기원을 추정하고, 연천 은대리 물거미 서식지를 비교 사례로 포함하여 해석의 타당성을 검증하는 것을 목적으로 하였다. 이를 위하여 현장 수질(수온, pH, EC, DO, ORP), 주요 이온 조성, 안정 동위원소(δ18O-δD), 라돈 농도, 시추코어 분석(ST-1, ST-3; 21YD-02, 21YD-04)을 종합적으로 수행하였다. 철원 지역의 지하수는 라돈 농도에 따라 두 그룹으로 구분되었다. CSG1·CSG2는 100,000–1,000,000 Bq/m3의 높은 라돈 농도와 Na-HCO3 유형을 보여 화강암 대수층 기원으로 추정되었으며, CSG3·CSG4와 샘통은 1,000–10,000 Bq/m3 범위의 낮은 농도와 Ca-HCO3 유형을 나타내어 현무암 대수층 기원으로 추정하였다. 시추코어 분석에서도 ST-1에서는 약 84 m 두께의 현무암층 하부에 화강암이 분포하고, ST-3에서는 16 m 이후 화강암 기반암이 확인되어 라돈 기반 추정 결과와 정합성을 보였다. 연천 은대리 지하수(EDG3, EDG4)는 1,000–20,000 Bq/m3 범위로 샘통과 유사한 현무암 대수층 특성을 보였으며, 습지 시료는 50–500 Bq/m3 수준으로 낮아 대기 접촉 및 지표수 혼합의 영향을 반영하였다. 또한 21YD-02와 21YD-04 코어는 상부 실트질·자갈질 머드층 하부에 현무암 기반암이 분포하여 지하수의 현무암 대수층 기원을 뒷받침하였다. 이러한 결과는 라돈 분석이 지하수 대수층의 기원을 판별하는 데 유효한 지시자임을 뒷받침하며, 한탄강 지질공원 내 지하수 자원의 과학적 이해를 심화하는 데 기여할 것이다.

키워드
라돈 분석
대수층 기원
화학조성
한탄강 지질공원
현무암·화강암 대수층
References
1

Cho, B.W., Choo, C.O., 2019, Geochemical behavior of uranium and radon in groundwater of Jurassic granite area, Icheon, Middle Korea, Water, 11(6), 1278.

10.3390/w11061278
2

Cho, B.W., Sung, I.H., Cho, S.Y., Park, S.K., 2007, A preliminary investigation of radon concentrations in groundwater of South Korea, Journal of Soil and Groundwater Environment, 12(5), 98-104 (in Korean with English abstract).

3

Choi, B.J., Oh, H.S., Koo, B.Y., Jung, S.H., Jung, J.M., Ahn, S.Y., Jung, J.Y., Kim, K.H., 2021, Monitoring survey of water spider habitat in Eundaeri, Yeoncheon, Yeoncheon-gun Office, 22-26 (in Korean).

4

Chwae, U., Choi, S., Park, K., Kim, K., 1996, Explanatory text of the geological map of Cheolwon-Majeonri sheet (1:50,000), Korea Institute of Geology, Mining & Materials, 62p (in Korean with English abstract).

5

Cothern, C.R., Rebers, P.A., 1990, Radon, radium and uranium in drinking water, Lewis Publishers, 283p.

6

EN Instrument Co., Ltd., 2020, User manual of RADON DETECTOR, 101p.

7

GER (Geoheritage and Environment Research Institute), 2023, Academic research service for the value identification of Saemtong in Cheorwon area of Hantan River UNESCO Global Geopark, Cheorwon-gun Office, 47p (in Korean).

8

Hakim, W.L., Ramayanti, S., Park, S., Ko, B., Cheong, D.K., Lee, C.W., 2022, Estimating the pre-historical volcanic eruption in the Hantangang River volcanic field: Experimental and simulation study, Remote Sensing, 14(4), 894.

10.3390/rs14040894
9

Kee, W.S., Lim, S.B., Kim, H.C., Kim, B.C., Hwang, S.K., Song, K.Y., Kihm, Y.H., 2008, Geological report of the Yeoncheon sheet (1:50,000), Korea Institute of Geoscience and Mineral Resources, 103p (in Korean with English abstract).

10

KICT (Korea Institute of Civil Engineering and Building Technology), 2022, Integrated groundwater basic survey report in Yeoncheon, Ministry of Environment, 4-21–4-24 (in Korean).

11

KIGAM (Korea Institute of Geoscience and Mineral Resources), 1996, Explanatory text of the geological map, 68p.

12

Kil, Y., Ahn, K.S., Woo, K.S., Lee, K.C., Jwa, Y.J., Jung, W., Young, K.S., 2019, Geoheritage values of the Quaternary Hantangang River volcanic field in the central Korean Peninsula, Geoheritage, 11, 765-782.

10.1007/s12371-018-0329-5
13

Kim, C.H., Jeong, H., 2014, A study on the Geopark utilization as a place of teaching and learning: The case of Gangwon Peace Geopark, Journal of the Association of Korean Geographers, 3(2), 89-96 (in Korean with English abstract).

10.25202/JAKG.3.2.1
14

King, P.T., Michel, J., Moore, W.S., 1982, Ground water geochemistry of 228Ra, 226Ra and 222Rn, Geochimica et Cosmochimica Acta, 46(7), 1173-1182.

10.1016/0016-7037(82)90003-5
15

K-water, 2022, Report on the integrated groundwater basic survey in Cheorwon area, Ministry of Environment and Korea Water Resources Corporation, 4-8–4-11 (in Korean).

16

Lee, M.B., Lee, G.R., Kim, N.S., 2007, The origin of paleo-lacustrine deposits at Yeoncheon in Chugaryeong Rift Valley, central Korea, Journal of the Korean Geographical Society, 40(6), 716-729 (in Korean with English abstract).

17

Lee, M.B., Lee, S.Y., 2017, Distribution of vegetation and geomorphological characteristics of the water spider (Argyroneta aquatica) habitat in the Jeongok Lava Plateau, central Korea, Journal of the Korean Geomorphological Association, 24(4), 57-73 (in Korean with English abstract).

10.16968/JKGA.24.4.57
18

Lee, M.B., Lee, S.Y., Kim, R.S., Cha, M.H., 2016a, A study on the ecological and geomorphological environment of the water spider (Argyroneta aquatica) habitat on the Jeongok Lava Plateau in Yeoncheon, central Korea, Journal of the Korean Geomorphological Association, 23(4), 85-99 (in Korean with English abstract).

10.16968/JKGA.23.4.85
19

Lee, S.J., Lim, W.S., Choi, D.W., Kim, J.S., Jeong, M.K., Woo, K.S., Kim, R., 2016b, Outstanding geoheritage values of the Hantangang River Geopark in Korea, Atlantic Geology, 52(1), 335-347.

20

Lee, Y.M., 2016, A study of the characteristics of the groundwater flow based on numerical modeling in the northern plain region, Pocheon, Gyeonggi-do, MSc Thesis, Hanyang University, 54p (in Korean with English abstract).

21

Loomis, D.P., 1987, Radon-222 concentration and aquifer lithology in North Carolina, Ground Water Monitoring Review, 7(2), 33-39.

10.1111/j.1745-6592.1987.tb01039.x
22

Nunes, L.J.R., Curado, A., Lopes, S.I., 2023, The relationship between radon and geology: Sources, transport and indoor accumulation, Applied Sciences, 13(13), 7460.

10.3390/app13137460
23

Oguni, S., Kakibuchi, K., Katayama, Y., 2005, Effects of environmental controls on the growth of wasabi (Eutrema japonica (Miq.) Koidz.) in a nutrient solution cultivation system, Environmental Control in Biology, 43(3), 181-191.

10.2525/ecb.43.181
24

Park, J.K., Lee, S., Shin, H.J., 2023, Preferred orientations of magnetic minerals inferred from basalt outcrops along the Hantangang River (Korea), Minerals, 13(8), 1011.

10.3390/min13081011
25

Ryu, H.S., Moon, J.A., Kim, H.J., 2023, Hydrochemical and microbial community characteristics of surface water and groundwater around Saemtong, Cheorwon, South Korea, The Journal of Engineering Geology, 33(2), 257-273 (in Korean with English abstract).

10.9720/kseg.2023.2.257
26

Shin, B.S., Koh, D.C., Chang, Y.Y., 2016, Hydrogeologic and hydrogeochemical assessment of water sources in Gwanin Water Intake Plant, Pocheon, Journal of Environmental Impact Assessment, 25(3), 209-221 (in Korean with English abstract).

10.14249/eia.2016.25.3.209
27

Song, K.Y., Cho, D.L., 2007, Geological report of the Gimhwa sheet (1:50,000), Korea Institute of Geoscience and Mineral Resources, 65p (in Korean with English abstract).

28

Stanley, J., Reading, L., 2025, Determination of radon source in basaltic groundwater using geochemical tracers and chemometric statistical analysis, Heliyon, 11(2), e41859.

10.1016/j.heliyon.2025.e4185939916847PMC11800080
29

Wathen, J.B., 1987, The effect of uranium setting in two-mica granites on uranium concentrations and radon activity in groundwater, Proceedings of the NWWA Conference, 31-45.

10.1201/9781003069836-4
30

Yang, J.H., 2018, Geomorphological characteristics of the water spider habitat in Yeoncheon, Journal of the Korean Geomorphological Association, 25(4), 77-88 (in Korean with English abstract).

10.16968/JKGA.25.4.77
Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 35
  • No :3
  • Pages :395-408
  • Received Date : 2025-09-11
  • Revised Date : 2025-09-24
  • Accepted Date : 2025-09-25
  • DOI :https://doi.org/10.9720/kseg.2025.3.395
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