DOI QR코드

DOI QR Code

Analysis of Precision of Interpolation of Reservoir bed Through Comparison of Data Acquired by Using UAV and Echo Sounder

UAV와 Echo Sounder 취득 자료의 비교를 통한 저수지 하상의 공간 보간별 정확도 분석

  • Roh, Tae-Ho (Division of DRONE Civil Engineering, University of GyeongNam Geochang)
  • 노태호 (경남도립거창대학 드론토목계열)
  • Received : 2020.06.25
  • Accepted : 2020.08.18
  • Published : 2020.09.30

Abstract

Reservoir is an important infrastructure of our society because it can store immense amount of water for various usages - manufacturing, agriculture, drinking, power generation, tourism etc. For maintenance of reservoir, various efforts in administrative and technological aspects are periodically conducted and monitoring the conditions of reservoir bed is the first priority for maintenance of reservoir. To check the conditions of reservoir bed, we measured depth of reservoir by using echo sounder, which is relatively reliable, prior to discharging of stored water and surveyed topography of reservoir by using UAV after discharging of water. Then, we conducted interpolation of measured depth of water by means of inverse distance weighting interpolation, Kriging interpolation, minimum curvature interpolation and radial basis function interpolation and calculated the volume of reservoir for each interpolation method. We compared the calculated volume of reservoir with the volume of water calculated by UAV after discharging of water and found the following results: First, as results of the above processes, we found that the Kriging interpolation was 97% correct in measurement of the volume of reservoir. Second, as results of comparison of differences between topographical areas and interpolated areas after selection of cross section for comparison, Kriging interpolation was found to have the most similar configuration with the topographical configuration by showing the least difference in the area of cross section. Therefore, it is determined that the optimal modeling of reservoir bed with the water depth data measured by echo sounder shall provide basic information for efficient maintenance of reservoir.

흐르는 물을 저장하여 공업, 농업, 상수도, 수력발전 등의 다양한 이용과 관광자원으로도 활용할 수 있는 저수지는 중요한 사회기반시설중의 하나이다. 그러므로 저수지의 유지관리는 행정 및 기술적 방안들을 동원하여 관리주체별로 정기적으로 수행되며, 저수지의 유지관리를 위해서는 저수지 하상 파악이 우선적이다. 이를 위하여 본 연구에서는 비교적 신뢰가 높은 Echo sounder를 이용한 방류전의 저수지 수심 측량과 방류후의 저수지 지형 측량을 UAV에 의하여 실시하였다. 그리고 수심 측량 자료를 Inverse Distance Weighting 보간, Kriging 보간, Minimum curvature 보간, Radial basis function 보간 등의 공간 보간별로 저수지의 내용적을 산출하여 UAV에 의한 방류 후 내용적 및 단면적을 비교 분석함으로 다음과 같은 결과를 알 수 있었다. 첫째, UAV에 의한 지형 자료와 Echo sounder에 의한 수심 자료를 공간 보간 기법별 적용 결과 Kriging 보간이 약 97%의 저수지 내용적 정확도를 확인 할 수 있었다. 둘째, 저수지 하상의 형상 비교를 위하여 검토 단면 설정 후 지형 선형과 보간별 선형의 상이 면적차를 비교한 결과 Kriging 보간이 최소 단면적 차이를 보임으로 지형 선형과의 가장 유사 형상임을 알 수 있었다. 따라서 Echo sounder에 의해 취득된 수심 자료로 저수지 하상의 최적 모델링 구축시 저수지의 효율적 유지관리에 기초적 자료 제공이 가능하리라 판단된다.

Keywords

References

  1. Ahn, J.M. and I.H. Park. 2012. An assessment on the hydraulic characteristics of a multi-dimensional model in response to measurement resolution and spatial interpolation methods. Journal of the Korean Society for Geospatial Information Science 20(1):43-51. https://doi.org/10.7319/kogsis.2012.20.1.043
  2. Cho, H.L. and J.C. Jeong. 2006. Application of spatial interpolation to rainfall data. Journal of the Korean Society for Geospatial Information Science 14(1):29-41.
  3. Cho, H.L. and J.C. Jeong. 2007. Mapping of enviromental data using spatial interpolation methods. Proceedings of the Conference of the Korean Society for Geospatial Information Science. pp.273-279.
  4. Cho, K.J., Y.H. Cho and E.W. Chung. 1998. A study on production and accuracy analysis of grid digital elevation models. Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography 20(4):375-381.
  5. Choi, N.I. 2009. GIS based spatial interpolation method for the reconstruction of river channel. Ph.D. Thesis, Univ. of Jeonbuk, Jeollabuk-do, Korea. 101pp.
  6. Department of geography and environmental science. 2020. http://www.geography.hunter.cuny.edu. (Accessed september 9, 2019)
  7. Environmental Systems Research Institute. 2020. https://www.esri.com. (Accessed september 15, 2019)
  8. Gotway, C.A., B. F. Richard, G. W. Hergert and A.P. Todd. 1996. Comparison of kriging and inverse-distance methods for mapping soil parameters. Soil Science Society of America Journal 60(4):1237-1247. https://doi.org/10.2136/sssaj1996.03615995006000040040x
  9. Jung, S.H. 2015. Accuracy analysis of seabed terrain modeling technology. Ph.M. Thesis, Univ. of Seoul, Seoul, Korea. 86pp.
  10. Jung, W.S. 2017. Development of geometric geoid model using GPS/leveling data. Ph.D. Thesis, Univ. of Inha, Incheon Metropolitan City, Korea. 100pp.
  11. Kim, G.Y., D.J. Seo and D.Y. Moon. 2006. An analysis of accuracy submarine topographic information by interpolation method. Journal of the Korean Society of Ocean Engineers 20(3):67-76.
  12. Lee, G.S., Y.W. Choi and N.I. Choi. 2012. Spatial interpolation method for the river channela reconstruction. Journal of the Korean Cadastreinformation Association 12(2):71-80.
  13. Lee, H.S. 2010. Comparison and evaluation of root mean square for parameter settings of spatial interpolation method. Journal of the Korean Association of Geographic Information Studies 13(3):29-41. https://doi.org/10.11108/kagis.2010.13.3.029
  14. Lee, K.W., H.W. Shon and D.I. Kim. 2016. Drone remote sensing photogrammetry. Goomibook Publishing Co., Seoul, 349pp.
  15. Li, J. and A.D. Heap. 2011. A review of comparative studies of spatial interpolation methods in enviromental sciences : performance and impact factors. Ecological Informatics 6(3-4):228-241. https://doi.org/10.1016/j.ecoinf.2010.12.003
  16. Ministry for Food, Forestry and fisheries & korea rural community corporation. 2019. https://www.ekr.or.kr/(한국농어촌공사, 2019).
  17. Mun, H.S., B.G. Song, K.J. Seo, T.H. Kim and K.H. Park. 2020. Analysis of $PM_{2.5}$ distribution construction using GIS spatial interpolation. Journal of the Korean Association of Geographic Information Studies 23(2):1-20. https://doi.org/10.11108/KAGIS.2020.23.2.001
  18. Park, J.C. and M.K. Kim. 2013. Comparison of precipitation distrution in precipitation data sets representing 1km spatial resolution over south korea produced by PRISM, IDW and cokriging. Journal of the Korean Association of Geographic Information Studies 16(3):147-163. https://doi.org/10.11108/kagis.2013.16.3.147
  19. Park, W.Y., C.H. Kim and H.Y. Lee. 2001. A study on the earthwork volume computation and topographic analysis using DTM Interpolations. Journal of the Korean Society for Geospatial Information Science 9(1):39-47.
  20. Schloeder, C.A., N. E. Zimmerman and M.J. Jacobs. 2001. Comparison of methods for interpolating soil properties using limited data. Soil Science Society of America Journal 65(2):470-479. https://doi.org/10.2136/sssaj2001.652470x
  21. Seo, J.H., D.J. Seo and J.C. Lee. 2002. Calculation of reservoir capacity by combination of GPS and echo Sounder. Journal of the Korea spatial information society 10(1):27-35.
  22. Woo, J.Y., J.H. Koo, C.H. Hong and T.H. Kim. 2001. A study on the interpolation methods and size of grid to the various topographical characteristics for the construction of DEM(Digital Elevation Model). Journal of the Korean Society for Geospatial Information Science 3(2):5-19.