Wetland Construction: Flood Control and Water Balance Analysis

  • Kim, Duck-Gil (Department of Civil Engineering, Inha University) ;
  • Kwak, Jae-Won (Department of Civil Engineering, Inha University) ;
  • Kim, Soo-Jun (Department of Civil Engineering, Inha University) ;
  • Kim, Hung-Soo (Department of Civil Engineering, Inha University) ;
  • Ahn, Tae-Jin (Department of Civil Engineering, Hankyong National University) ;
  • Singh, Vijay P. (Department of Biological and Agricultural Engineering, Texas A&M University)
  • Received : 2010.09.14
  • Accepted : 2010.11.16
  • Published : 2010.12.30


Recent years have witnessed increasing interest in wetland constructions in Korea as a flood control measure during the flood season and for consideration of the ecology during the non-flood season. In this study, hydraulic and hydrologic analyses were performed on a wetland construction plan for use as an alternative sustainable flood defense during the flood season, as well as a wetland that can protect the ecosystem during the non-flood season. The study area was the basin of the Topyeong-cheon stream, which is a tributary of the Nakdong River, including the Upo wetland, which is registered in the Ramsar Convention and the largest inland wetland in Korea. Wetlands were to be constructed at upstream and downstream of the Upo wetland by considering and analyzing seven scenarios for their constructions to investigate the effect of flood control during the flood season; it was found the best scenario reduced the flood level by 0.56 m. To evaluate the usefulness of the constructed wetlands during the non flood season, the water balance in the wetlands was analyzed, with the best scenario found to maintain a minimum water level of 1.3 m throughout the year. Therefore, the constructed wetlands could provide an alternative measure for flood prevention as well as an ecosystem for biodiversity.


  1. Bradley C. Simulation of the annual water table dynamics of a floodplain wetland, Narborough Bog, UK. J. Hydrol. 2002;261:150-172.
  2. Connor KJ, Gabor S. Breeding waterbird wetland habit availability and response to water-level management in Saint John River Floodplain wetlands, New Brunswick. Hydrobiologia 2006;567.
  3. Ming J, Xian Guo L, Lin Shu X, Li Juan C, Shouzheng T. Flood mitigation benefit of wetland soil-A case study in Momoge National Nature Reserve in China. Ecol. Econ. 2007;61:217-223.
  4. Fink DF, Mitsch WJ. Hydrology and nutrient biogeochemistry in a created river diversion oxbow wetland. Ecol. Eng. 2007;30:93-102.
  5. Martinez CJ, Wise WR. Analysis of constructed treatment wetland hydraulics with the transient storage model OTIS. Ecol. Eng. 2003;20:211-222.
  6. Conly FM, Van Der Kamp G. Monitoring the hydrology of Canadian prairie wetlands to detect the effects of climate change and land use changes. Environ. Monit. Assess. 2001;67:195-215.
  7. Clayton B, Hicks DW. Hydrologic monitoring of a hardwood encroached, isolated depressional wetland, southwest Georgia. In: Proceedings of the 2007 Georgia Water Resources Conference; 2007 Mar. 27-29; Athens, GA.
  8. Morris J, Bailey A, Alsop D, Vivash R, Lawson C, Leeds-Harrison PB. Integrating flood management and agri-environment through washland creation in the UK. In: 14th International Farm Management Congress; 2003 Aug. 10-15; Perth, Western Australia: International Farm Management Association.
  9. Morris J, Hess TM, Gowing DJ, et al. Integrated washland management for flood defence and biodiversity. In: 38th Defra Flood and Coastal Management Conference; 2003 Jul. 16-18; Keele University, UK.
  10. Morris J, Hess TM, Gowing DJG, et al. A framework for integrating flood defence and biodiversity in washlands in England. Int. J. River Basin Manag. 2005;3:105-115.
  11. Ministry Construction and Transportation. The report of channel improvement plan (Topyeong-cheon). Gwacheon: Ministry Construction and Transportation; 2004.