Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Development of a distributed hydrological model considering hydrological change

  • Kim, Deasik (Department of Agricultural & Rural Engineering, Chungnam National University) ;
  • An, Hyunuk (Department of Agricultural & Rural Engineering, Chungnam National University) ;
  • Jang, Minwon (Department of Agricultural & Rural Engineering, Gyeogsang National University) ;
  • Kim, Seongjoon (Department of Civil and Environmental System Engineering, Konkuk University)
  • Received : 2017.12.01
  • Accepted : 2018.05.23
  • Published : 2018.09.30
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Abstract

In recent decades, the dry stream phenomena of small and medium sized rivers have been attracting much attention as an important social problem. To prevent dry stream phenomena, it is necessary to build an infrastructure that manages rivers. To accurately determine the progress of dry stream phenomena, it is necessary to continuously measure the discharge and other hydrological factors for small and medium sized rivers. However, until now, the flow data for small and medium rivers in Korea has been insufficient. To overcome the lack of supporting data for supporting rational decision-making in policy and project implementation, a short- and long-term hydrological model was developed that takes into consideration hydrological changes such as the increase of the impervious area due to urban development and groundwater pumping, the construction of a large-scale sewage treatment plant, the maintenance of stream-oriented rivers, etc. In the developed model, the distributed grid is represented by three layers: Surface flow, interflow, and groundwater flow. The surface flow and intermediate flow flowed along the flow direction, and the groundwater flow was calculated by a two-dimensional groundwater analysis model such that the outflow occurred in all directions without a specific flow direction. The effects of land use and cover on evapotranspiration and infiltration and the effects of multiple landscapes can be simulated in the developed model.

Keywords

References

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