Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Investigation of the change in physical habitat in the Geum-gang River by modifying dam operations to natural flow regime

자연유황 회복을 위한 댐 운영에 따른 금강의 물리서식처 변화 분석

  • Choi, Byungwoong (Yeongsan River Environment Research Center, National Institute of Environmental Research, Ministry of Environment) ;
  • Jang, Jiyeon (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Choi, Sung-Uk (Department of Civil and Environmental Engineering, Yonsei University)
  • 최병웅 (환경부 국립환경과학원 영산강물환경연구소) ;
  • 장지연 (연세대학교 건설환경공학과) ;
  • 최성욱 (연세대학교 건설환경공학과)
  • Received : 2021.10.21
  • Accepted : 2021.11.01
  • Published : 2021.11.30
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Abstract

In general, the upstream dam changes downstream flow regime dramatically, i.e., from natural flow regime to hydropeaking flows. This study investigates the impact of the natural flow pattern on downstream fish habitat in a regulated river in Korea using the physical habitat simulation. The study area is a 13.4 km long reach of the Geum-gang River, located downstream from the Yongdam Dam, Korea. A field monitoring revealed that three fish species are dominant, namely Zacco platypus, Coreoleuciscus splendidus, and Opsariichthys bidens, and they account for 70% of the total fish community. Specially, Opsariichthys bidens is an indigenous species in the Geum-gang River. The three fish species are selected as target fish species for the physical habitat simulation. The Nays2D model, a 2D shallow water equation solver, and the HSI (Habitat Suitability Index) model are used for hydraulic and habitat simulations, respectively. To assess the impact of the natural flow pattern, this study uses the annual natural flow regime and hydropeaking flows from the dam. It is found that the natural flow regime increases significantly the Composite Suitability Index (CSI) in the study reach. Then, using the Building Block Approach (BBA), the scenarios for the modifying dam operations are presented in the study reach. Both Scenario 1 and scenario 2 are proposed by using the hydrological method considering both magnitude and duration of the inflow and averaging the inflow over each month, respectively. It is revealed that the natural flow regime embodied in scenario 1 and scenario 2 increases the Weighted Usable Area (WUA) significantly, compared to the hydropeaking flows. In conclusion, the modifying the dam operations by restoring to the natural flow pattern is advantageous to fish community.

일반적으로 상류의 댐은 하류 유황을 자연 상태에서 발전방류 조건으로 심각하게 변화시킨다. 본 연구에서는 물리서식처모의를 통하여 국내 조절하천에서 자연유황 패턴이 하류의 어류 서식처에 미치는 영향을 조사하였다. 연구 대상하도는 금강의 용담댐 하류 13.4 km 구간으로 설정하였다. 현장조사 결과, 대상하도에서 피라미, 쉬리, 그리고 끄리가 우점하고 있는 것으로 나타났으며, 이들이 전체의 70%를 차지하고 있는 것으로 파악되었다. 이중 끄리는 금강에 서식하는 토착어종이다. 이들 3종을 물리서식처모의를 위한 대상어종으로 선정하였다. 수리해석과 서식처모의를 위하여 2차원 천수방정식에 기반한 Nays2D 모형과 HIS 모형을 각각 사용하였다. 자연 유황에 따른 영향을 검토하기 위하여, 본 연구에서는 댐 유입 유량과 발전유량을 이용하였다. 물리서식처모의 결과, 자연유황 조건에서 대상하도의 복합서식처지수가 크게 증가하는 것으로 나타났다. 그리고 BBA 방법을 이용하여 대상하도에 자연유황에 대한 댐 운영 시나리오를 제시하였다. 시나리오 1을 위하여 유입유량의 양과 지속기간을 고려하는 수문학적 방법을 이용하였고, 시나리오 2는 유입유량을 월별로 평균하여 구축하였다. 시나리오 1과 시나리오 2를 통해서 구현된 자연유황 조건이 발전방류에 비해 가중가용면적을 크게 증가시키는 것으로 나타났다. 결과적으로 댐 운영을 자연유황 조건으로 변환시켜 방류하였을 때 하류의 어류 서식처를 개선하는데 도움이 되는 것으로 확인되었다.

Keywords

Acknowledgement

본 연구는 2021년도 정부의 재원으로 한국연구재단의 지원(NRF2020R1A2B5B01098937)을 받아 수행된 연구입니다. 이에 감사드립니다.

References

  1. Ahern, M., Kovats, R.S., Wilkinson, P., Few, R., and Matthies, F. (2005). "Global health impacts of floods: Epidemiologic evidence." Epidemiologic Reviews, Vol. 27, No. 1, pp. 36-46. https://doi.org/10.1093/epirev/mxi004
  2. Baldwin, D.S., Colloff, M.J., Mitrovic, S.M., Bond, N.R., and Wolfenden, B. (2016). "Restoring dissolved organic carbon subsidies from floodplains to lowland river food webs: A role for environmental flows?" Marine and Freshwater Research, Vol. 67, No. 9, pp. 1387-1399. https://doi.org/10.1071/mf15382
  3. Benjankar, R., Jorde, K., Yager, E.M., Egger, G., Goodwin, P., and Glenn, N.F. (2012). "The impact of river modification and dam operation on floodplain vegetation succession trends in the Kootenai River." USA. Ecological Engineering, Vol. 46, pp. 88-97. https://doi.org/10.1016/j.ecoleng.2012.05.002
  4. Boavida, I., Santos, J.M., Ferreira, T., and Pinheiro, A. (2015). "Barbel habitat alterations due to hydropeaking." Journal of Hydroenvironment Research, Vol. 9, pp. 237-247.
  5. Booker, D.J., and Dunbar, M.J. (2004). "Application of physical habitat simulation (PHABSIM) modelling to modified urban river channels." River Research and Applications, Vol. 20, No. 2, pp. 167-183. https://doi.org/10.1002/rra.742
  6. Bunn, S.E., and Arthington, A.H. (2002). "Basic principles and ecological consequences of altered flow regimes for aquatic biodiversity." Environmental Management, Vol. 30, pp. 492-507. https://doi.org/10.1007/s00267-002-2737-0
  7. Catlin, A.K., Collier, K.J., and Duggan, I.C. (2017). "Zooplankton generation following inundation of floodplain soils: Effects of vegetation type and riverine connectivity." Marine and Freshwater Research, Vol. 68, No. 1, pp. 76-86. https://doi.org/10.1071/mf15273
  8. Choi, B., and Choi, S.U. (2015). "Physical habitat simulations of the Dal River in Korea using GEP model." Ecological Engineering, Vol. 83, pp. 456-465. https://doi.org/10.1016/j.ecoleng.2015.06.042
  9. Choi, B., and Choi, S.U. (2018). "Impact of hydropeaking and thermopeaking on the downstream habitat in the Dal River, Korea." Ecological Informatics, Vol. 43, pp. 1-11. https://doi.org/10.1016/j.ecoinf.2017.10.016
  10. Choi, S.U., Kim, S.K., Choi, B., and Kim, Y. (2017). "Impact of hydropeaking on downstream fish habitat at the Goesan Dam in Korea." Ecohydrology, Vol. 10, No. 6, e1861. https://doi.org/10.1002/eco.1861
  11. Clarkson, R.W., and Childs, M.R. (2000). "Temperature effects of hypolimnial-release dams on early life stages of Colorado River basin big-river fishes." Copeia, Vol. 2000, No. 2, pp. 402-412. https://doi.org/10.1643/0045-8511(2000)000[0402:TEOHRD]2.0.CO;2
  12. Collier, M., Webb, R.H., and Schmidt, J.C. (1996). Dams and rivers: Primer on the downstream effects of dams. Circular 1126, US Geological Survey, US Department of the Interior, Washington, D.C., U.S.
  13. Garcia, A., Jorde, K., Habit, E., Caamano, D., and Parra, O. (2011). "Downstream environmental effects of dam operations: Changes in habitat quality for native fish species." River Research and Applications, Vol. 27, No. 3, pp. 212-327.
  14. Gibbins, C.N., and Acornley, R.M. (2000). "Salmonid habitat modelling studies and their contribution to the development of an ecologically acceptable release policy for Kielder Reservoir, North-east England." River Research and Applications, Vol. 16, No. 3, pp. 203-224.
  15. Gosse, J.C. (1982). Microhabitat of rainbow and cutthroat trout in the green river below flaming Gorge Dam. Final report, contract 81 5049. Utah Division of Wildlife Resources, Ministry of Science and Technology, Salt Lake City, UT, U.S., p. 114.
  16. Gupta, H., Kao, S.J., and Dai, M. (2012). "The role of mega dams in reducing sediment fluxes: A case study of large Asian rivers." Journal of Hydrology, Vol. 464, pp. 447-458. https://doi.org/10.1016/j.jhydrol.2012.07.038
  17. Hur, J.W., and Seo, J. (2011). "Investigation on physical habitat condition of Korean chub (Zacco koreanus) in typical streams of the Han river." Journal of Environmental Impact Assessment, Vol. 20, No. 2, pp. 207-215 (in Korean). https://doi.org/10.14249/EIA.2011.20.2.207
  18. Hur, J.W., In, D.S., Jang, M.H., Kang, H., and Kang, K.H. (2011). "Assessment of inhabitation and species diversity of fish to substrate size in the Geum River basin." Journal of Environmental Impact Assessment, Vol. 20, No. 6, pp. 845-856. https://doi.org/10.14249/EIA.2011.20.6.845
  19. International River Interface Corparative (iRIC). (2013). Guide book on iRIC Seminar in KANSAI, iRIC Project, Silicon Graphics, Inc., Hokkaido, Japan.
  20. Kang, H., Hur, J.W., and Park, D. (2017). "The effects of cold water released from dams Zacco platypus gonad manuration in the Nakdong River, South Korea." KSCE Journal of Civil Engineering, Vol. 21, No. 4, pp. 1473-1483. https://doi.org/10.1007/s12205-016-1063-7
  21. King, J.M., and Tharme, R.E. (1994). Assessment of the instream flow incremental methodology and initial development of alternative instream flow methodologies for South Africa. WRC Report No. 295/1/94, Water Research Commission, Pretoria, South Africa.
  22. King, J.M., Tharme, R.E., and de Villiers, M.S. (2008). Environmental flow assessments for rivers: Manual for the building block methodology. Updated Edition. WRC Report No. TT 354/08, Water Research Commission, Pretoria, South Africa.
  23. Kondolf, G.M. (1997). "PROFILE: Hungry water: Effects of dams and gravel mining on river channels." Environmental Management, Vol. 21, No. 4, pp. 533-551. https://doi.org/10.1007/s002679900048
  24. Lessard, J.L., and Hayes, D.B. (2003). "Effects of elevated water temperature on fish and macroinvertebrate communities below small dams." River Research and Applications, Vol. 19, No. 7, pp. 721-732. https://doi.org/10.1002/rra.713
  25. Li, R., Chen, Q., and Ye, F. (2011). "Modelling the impacts of reservoir operations on the downstream riparian vegetation and fish habitats in the Lijiang River." Journal of Hydroinformatics, Vol. 13, No. 2, pp. 229-244. https://doi.org/10.2166/hydro.2010.008
  26. McCully, P. (1996). Silenced rivers: The ecology and politics of large dams. Zed Books, London, UK.
  27. Milhous, R.T. (2004). "Mixing physical habitat and streamflow time series analysis." Hydroecologie Appliquee, Vol. 14, pp. 69-91. https://doi.org/10.1051/hydro:2004005
  28. Ministry of Land, Infrastructure and Transport (MOLIT) (2011). Integrated river restoration manual. EcoRiver21.
  29. Ministry of Land, Transport and Maritime Affairs (MLTMA) (2011). Development of techniques for creation of wildlife habitat environment.
  30. Mueller, E.R., Schmidt, J.C., Topping, D.J., Shafroth, P.B., RodriguezBurgueno, J.E., Ramirez-Hernandez, J., and Grams, P.E. (2016). "Geomorphic change and sediment transport during a small artificial flood in a transformed post-dam delta: The Colorado River delta, United States and Mexico." Ecological Engineering, Vol. 106, pp. 757-775. https://doi.org/10.1016/j.ecoleng.2016.08.009
  31. Nilsson, C., Reidy, C. A., Dynesius, M., and Revenga, C. (2005). "Fragmentation and flow regulation of the world's large river systems." Science, Vol. 308, No. 5720, pp. 405-408. https://doi.org/10.1126/science.1107887
  32. Poff, N.L., Allan, J.D., Bain, M.B., Karr, J.R., Prestegaard, K.L., Richter, B.D., Sparks, R.E., and Stromberg, J.C. (1997). "The natural flow regime: A paradigm for river conservation and restoration." BioScience, Vol. 47, pp. 769-784. https://doi.org/10.2307/1313099
  33. Postel, S., and Richter, B.D. (2003). Rivers for life: Managing water for people and nature, Island Press, Washington, D.C., U.S.
  34. Reusser, L.J., Bierman, P.R., Rizzo, D.M., Portenga, E.W., and Rood, D.H. (2017). "Characterizing landscape-scale erosion using 10Be in detrital fluvial sediment: Slope-based sampling strategy detects the effect of widespread dams." Water Resources Research, Vol. 53, No. 5, pp. 4476-4486. https://doi.org/10.1002/2016WR019774
  35. Richter, B., and Thomas, G. (2007). "Restoring environmental flows by modifying dam operations." Ecology and Society, Vol. 12, No. 1, p. 12.
  36. Richter, B.D., Matthews, R., Harrison, D.L., and Wigington, R. (2003). "Ecologically sustainable water management: Managing river flows for river integrity." Ecological Applications, Vol. 13, pp. 206-224. https://doi.org/10.1890/1051-0761(2003)013[0206:ESWMMR]2.0.CO;2
  37. Richter, B.D., Warner, A.T., Meyer, J.L., and Lutz, K. (2006). "A collaborative and adaptive process for developing environmental flow recommendations." River Research and Applications, Vol. 22, pp. 297-318. https://doi.org/10.1002/rra.892
  38. Rosenberg, D.M., McCully, P., and Pringle, C.M. (2000). "Global-scale environmental effects of hydrological alterations: Introduction." BioScience, Vol. 50, No. 9, pp. 746-751. https://doi.org/10.1641/0006-3568(2000)050[0746:GSEEOH]2.0.CO;2
  39. Shafroth, P.B., Auble, G.T., Stromberg, J.C., and Patten, D.T. (1998). "Establishment of woody riparian vegetation in relation to annual patterns of streamflow, Bill Williams River, Arizona." Wetlands, Vol. 18, pp. 577-590. https://doi.org/10.1007/BF03161674
  40. Shimizu, Y., Inoue, T., Hamaki, M., and Iwasaki, T. (2012). iRIC software Nays2D solver manual, International River Interface Cooperative, Japan.
  41. Tockner, K., and Stanford, J.A. (2002). "Riverine flood plains: Present state and future trends." Environmental Conservation, Vol. 29, No. 3, pp. 308-330. https://doi.org/10.1017/S037689290200022X
  42. Todd, C.R., Ryan, T., Nicol, S.J., and Bearlin, A.R. (2005). "The impact of cold water releases on the critical period of post-spawning survival and its implications for Murray cod (Maccullochella peelii peelii): A case study of the Mitta Mitta River, southeastern Australia." River Research and Applications, Vol. 21, No. 9, pp. 1035-1052. https://doi.org/10.1002/rra.873
  43. U.S. Fish and Wildlife Service (USFWS) (1981). Standards for the development of habitat suitability index models. 103 ESM, U.S. Department of the Interior, Washington, D.C., U.S.
  44. Valentin, S., Lauters, F., Sabaton, C., Breil, P., and Souchon, Y. (1996). "Modelling temporal variations of physical habitat for brown trout (Salmo trutta) in hydropeaking conditions." Regulated Rivers: Research and Management, Vol. 12, No. 2-3, pp. 317-330. https://doi.org/10.1002/(SICI)1099-1646(199603)12:2/3<317::AID-RRR398>3.0.CO;2-1
  45. Vorosmarty, C.J., Meybeck, M., Fekete, B., Sharma, K., Green, P., and Syvitski, J.P. (2003). "Anthropogenic sediment retention: Major global impact from registered river impoundments." Global and planetary change, Vol. 39, No. 1, pp. 169-190. https://doi.org/10.1016/S0921-8181(03)00023-7
  46. Williams, G.P., and Wolman, M.G. (1984). Downstream effects of dams on alluvial rivers. Geological Survey Professional Paper No. 1286, U.S. Geological Survey, U.S. Department of the Interior, Washington, D.C., U.S.
  47. Willis, C.M., and Griggs, G.B. (2003). "Reductions in fluvial sediment discharge by coastal dams in California and implications for beach sustainability." The Journal of Geology, Vol. 111, No. 2, pp. 167-182. https://doi.org/10.1086/345922
  48. World Commission on Dams (WCD) (2000). Dams and development: A new framework for decision-making, Earthscan Publication Ltd, London and Sterling, VA, U.S.
  49. Yeom, D.H., Lee, S.A., Kang, G.S., Seo, J., and Lee, S.K. (2007)." Stressor identification and health assessment of fish exposed to wastewater effluents in Miho Stream, South Korea." Chemosphere, Vol. 67, pp. 2282-2292. https://doi.org/10.1016/j.chemosphere.2006.09.071
  50. Zadereev, E.S., Gulati, R.D., and Camacho, A. (2017). "Biological and ecological features, trophic structure and energy flow in Meromictic Lakes." Ecology of Meromictic Lakes, Edited by Gulati, R.D., Zadereev E.S., and Degermendzhi A., Vol. 228, Springer, Cham, Switzerland, pp. 61-86.
  51. Zolezzi, G., Siviglia, A., Toffolon, M., and Maiolini, B. (2011). "Thermopeaking in Alpine streams: Event characterization and time scales." Ecohydrology, Vol. 4, No. 4, pp. 564-576. https://doi.org/10.1002/eco.132