KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지
DOI QR코드

DOI QR Code

Two-dimensional Spatial Distribution Analysis Using Water Quality Measurement Results at River Junctions

하천 합류부에서의 수질계측결과를 활용한 2차원 공간분포 해석

  • 이창현 (명지대학교 토목환경공학과) ;
  • 박재곤 (한국수자원조사기술원) ;
  • 김경동 (단국대학교 토목공학과) ;
  • 류시완 (창원대학교 토목공학과) ;
  • 김동수 (단국대학교 토목공학과) ;
  • 김영도 (명지대학교 토목환경공학과)
  • Received : 2022.02.03
  • Accepted : 2022.03.08
  • Published : 2022.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

High-resolution data are needed to understand water body mixing patterns at river junctions. In particular, in river analysis, hydrological and water quality characteristics are used as basic data for aquatic ecological health, so observation through continuous monitoring is necessary. In addition, since measurement is carried out through a one-dimensional and fixed measurement method in existing monitoring systems, a hydrological and water quality characteristics investigation of an entire river, except for in the immediate vicinity of the measurement point, is not undertaken. In order to obtain high-resolution measurement data, a measurer has to consider multiple factors, and the area or time that can be measured is limited. Although the resolution might be lowered, an appropriate interpolation method must be selected in order to acquire a wide range of data. Therefore, in this study, a high-elevation measurement method at a river junction was introduced, and the interpolation method according to the measurement results was compared. The overall hydraulic and water quality information of the river was indicated through the visualization of the prediction and interpolation method in the low-resolution measurement result. By comparing each interpolation method, Inverse Distance Weighting, Natural Neighbor, and Kriging techniques were applied in river mapping to improve the precision of river mapping through visualized data and quantitative evaluation. It is thought that this study will offer a new method for measuring rivers through spatial interpolation.

하천합류부에서 수체혼합양상을 파악하기 위해서는 고해상도의 자료가 필요하다. 특히 하천분석에 있어 수리·수질 특성은 수생태 건강성에 대한 기초자료로 사용되기 때문에 지속적 모니터링을 통해 관측이 필요한시점이다. 또한 현제 기존의 모니터링 체계에서도 1차원적인 고정적인 측정방법을 통해 측정이 진행되기 떄문에 측정지점 주변의 제외한 하천 전체의 수리·수질 특성조사가 이루어지지 않고 있다. 그에 따른 고해상도의 측정자료를 얻기 위해서는 측정자가 부담을 많이 가지며, 측정할 수 있는 영역이나 시간적으로 제한적이다. 해상도는 낮추되 광범위한 데이터를 취득하기 위해서는 적절한 보간법이 선정되어야 한다. 따라서 본 연구에서는 하천합류부에서의 고해상도 측정방법을 소개하고 계측결과에 따른 보간법 비교하였다. 이를 이용한 저해상도 측정결과에서의 예측과 보간법에 대한 시각화를 통해 하천의 전체적인 수리·수질정보를 표기하였다. 각각의 보간법을 비교함으로써 하천 매핑에 있어 IDW, Natural Neighbor, Kriging 기법을 적용하여 시각화된 자료와 정량적 평가를 통해 하천매핑의 정밀성을 향상시켰다. 본연구를 통해 공간보간을 통한 하천의 측정의 새로운 방안제시가 될것이라 사료된다.

Keywords

Acknowledgement

본 연구는 환경부 수생태 건강성 확보기술개발사업의 연구비지원(2021003030005)에 의하여 수행되었으며, 이와 같은 지원에 감사드립니다.

References

  1. Baek, S. J., Seong, C. Y., Choe, S. H., Park, Y. S. and Kim, M. S. (2018). "Mobile water quality monitoring system using ion-selective-electrodes." Journal of the Institute of Electronics and Information Engineers, Vol. 55, No. 2, pp. 29-38. https://doi.org/10.5573/ieie.2018.55.2.29
  2. Cho, H. L. and Jeoung, J. C. (2006). "A study on spatial and temporal distribution characteristics of coastal water quality using GIS." Journal of Korea Spatial Information Society, Vol. 14, No. 2, pp. 223-234.
  3. Hwang, K. S., Park, D. S. and Jung, W. S. (2006). "Spatial reservoir temperature monitoring using thermal line sensor." Proceedings of the Korea Water Resources Association Conference, pp. 1002-1006.
  4. Kim, D. H., Ryu, D. W., Choi, Y. M. and Lee, W. J. (2010). "Application of kriging and inverse distance weighting method for the estimation of geo-layer of songdo area in Incheon." Journal of the Korean Geotechnical Society, Vol. 26, No. 1, pp. 5-19.
  5. Koo, H. D., Chung, D. K. and Yoo, H. H. (2004). "Analysis of 3D data structuring and processing techniques for 3D GIS, Korean society of surveying." Geodesy, Photogrammetry and Cartography, pp. 375-382.
  6. Lee, H. E., Lee, C. J., Kim, Y. J. and Kim, W. (2009). "Analysis of vertical velocity distribution in natural rivers with ADCPs." Proceedings of the Korea Water Resources Association Conference, pp. 1865-1869.
  7. Lee, H. S., Chung, S. W., Choi, J. K., Oh, D. G. and Heo, T. Y. (2011). "Analysis of spatial water quality variation in daechung reservoir." Journal of Korean Society on Water Environment, Vol. 27, No. 5, 2011, pp. 699-709. https://doi.org/10.15681/KSWE.2011.27.5.16
  8. Lee, J. H. and Kim, Y. H. (2014). "Location suitability assessment on marine afforestation using habitat evaluation procedure (HEP) and 3D kriging: A case study on Jeju, Korea." Journal of the Economic Geographical Society of Korea, Vol. 17, No. 4. pp. 771-785. https://doi.org/10.23841/egsk.2014.17.4.771
  9. Lee, J. O., Park, U. Y., Yang, Y. B. and Kim, Y. S. (2005). "3D modelling shape embodiment and efficiency analysis of reservoir that using RTK-GPS and E/S." Journal of Korean Society for Geospatial Information Science, Vol. 13, No. 1, pp. 11-179.
  10. Lee, S. O. and Ju, S. S. (2019). "Suggestion of the necessity of 3D numerical analysis model guidelines." Water and the Future, Korea Water Resources Association, Vol. 52, No. 1, pp. 74-80.
  11. Park, Y. W., Cho, K. A. and Cho, C. (2008). "Seasonal variation of water temperature and dissolved oxygen in the youngsan reservoir." Journal of Korean Society on Water Environment, Vol. 24, No. 1, pp. 44-53.
  12. Ryu, S. W. (2021). Investigation and analysis of mixing behavior at the confluence of the representative tributaries in the middle and lower reach of nakdong river [Year 3], Nakdong River Basin Environment Office, Chang-won University.
  13. Song, E. S., Cho, K. A. and Sin, Y. S. (2015). "Exploring the dynamics of dissolved oxygen and vertical density structure of water column in the Youngsan lake." Journal of Environmental Science International, Vol. 24, No. 2, pp. 163-174. https://doi.org/10.5322/JESI.2015.24.2.163