DOI QR코드

DOI QR Code

Flow Analysis Based on the Recovery of Lateral Connectivity in the River

하천 내 횡적 연결성 회복을 통한 흐름 해석

  • Received : 2014.01.15
  • Accepted : 2014.02.28
  • Published : 2014.05.31

Abstract

Recently, river maintenance is change due to concern for the environment increases. Thus, the river restoration and river environment is best part of river maintenance. In case of Korea, existing river is improvement straightly for flood control and transportation. When the stream channel is straightly, maintain stability is important. Thus, construction of levees along the river. The various river structures for the purpose of flood control and transportation are inhibit factors of longitudinal and lateral connectivity. Connectivity is defined as the maintenance of lateral, longitudinal, and vertical pathways for biological, hydrological, and physical processes. Long-term point of view, increased connectivity is very important for a healthy ecosystem composition. As the first step of river restoration, this study described theory and concept of river continuum and the numerical model was applied to a real topography to simulate the flow analysis with or without segregated and blocked space in the Mankyung river. The results of this study can be utilized to develop the watershed connectivity assessments methods in order to the river restoration.

최근 하천정비는 환경에 대한 인식이 높아지면서 이수 및 치수뿐만 아니라 하천환경에 대한 관심이 증가하는 쪽으로 바뀌어가고 있는 실정이다. 따라서, 하천환경 또는 하천복원이 하천사업의 핵심이 되고 있다. 우리나라의 경우, 대부분의 하천이 치수목적의 하천정비에 의해 홍수조절과 주운을 돕기 위해 직강화 되었다. 하도를 직강화 할 경우 안정성 유지가 중요하므로 하천을 따라 제방이 축조된다. 이와같이 이수와 치수를 목적으로 하천에 축조된 댐, 보, 제방 및 수문 등과 같은 구조물의 경우, 하천의 종 횡적 연결성(Connectivity)을 저해하는 요인이 된다. 연결성이란 어떤 서식처에서 다른 서식처로 에너지와 물질을 이동시키거나 자연적인 수로를 통하여 서식처 간을 물리적으로 연결하는 동적인 자연통로로써 장기적인 하천복원관점에서 볼 때 연결성 증대는 유역 내 건강한 생태계 조성을 위해 매우 중요하다. 본 연구에서는 횡적 연결성 회복을 통한 하천복원의 첫 번째 단계로써 연결성에 대한 기본개념을 설명하고 대상유역을 선정하여 연결성을 저해하는 격리, 차단 공간의 유무에 따른 유역 내 흐름양상의 변화를 수치모의 하였다. 본 연구의 결과는 유역 내 수리수문연결기술 개발로 이어질 수 있을 것으로 판단되며, 차후 하천복원사업에 기여할 수 있을 것으로 판단된다.

Keywords

References

  1. Amoros, C, Roux, AL, Reygrobellet, JL, Bravard, JP and Pantou, G (1987). A method for applied ecological studies of fluvial hydrosystems, Regulated Rivers: Research & Management, 1, pp. 17-38. https://doi.org/10.1002/rrr.3450010104
  2. Castelle, AJ, Conolly, C, Emers, M, Metz, ED, Meyer, S, Witter, M, Mauerman, S, Erickson, T and Cooke, S (1992). Wetland Buffers: Use and Effectiveness, Washington State Department of Ecology, Olympia, Washington.
  3. Friesen, LE, Eagels, PF and Mackay, RJ (1995). Effects of residential development on forest-dwelling neotropical migrant songbirds, Conservation Biology, 9, pp. 1408-1414. https://doi.org/10.1046/j.1523-1739.1995.09061408.x
  4. Gibbs, JP (2000). Monitoring populations, Research Techniques in Animal Ecology. pp. 213-252.
  5. Ickes, BS, Vallazza, J, Kalas, J and Knights, B (2005). River floodplain connectivity and lateral fish passage: A literature review, U.S. Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, June 2005, pp. 25.
  6. Miller, SN, Semmens, DJ, Goodrich, DC, Hernandez, M, Miller, RC, Kepner, WG and Guertin, DP (2007). The automated geospatial watershed assessment tool, Environmental Modelling & Software, 22, pp. 365-377. https://doi.org/10.1016/j.envsoft.2005.12.004
  7. Minnesota Department of Natural Resources. Watershed Assessment Tool, State of Minnesota, USA. www.dnr.state.mn.us/watershed_tool/index.html
  8. Pess, GR, Beechie, TJ, Williams, EJ, Lange, JI and Klochak, JR (2003). Chapter 8. Watershed assessment techniques and the success of aquatic restoration activities, Strategies for Restoring River Ecosystems: Sources of Variability and Uncertainty in Natural and Managed Systems. pp. 185-201.
  9. Shisler, JK, Jordan, RA and Wargo, RN (1987). Coastal wetland buffer delineation, New Jersey Department Of Environmental Protection.
  10. Keller, CME, Robbins, CS and Hatfield, JS (1993). Avian communities in riparian forests of different widths in Maryland and Delaware, Wetlands, 13, pp. 137-144. https://doi.org/10.1007/BF03160874
  11. Vannote, RL, Minshall, GW, Cummins, KW, Sedall, JR and Cushing, CE (1980). The river continuum concept, Canadian J. of Fisheries and Aquatic Sciences, 37, pp. 130-137. https://doi.org/10.1139/f80-017
  12. Ward, JV (1989). The four-dimensional nature of lotic ecosystems, J. of the North American Benthological Society, 8(1), pp. 2-8. https://doi.org/10.2307/1467397