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Assessment for the Possibility of Water-ecosystem Restoration Applying LID Techniques in the Deokjin Park Area, Jeonju City

LID기법을 이용한 전주 덕진공원의 수생태 복원 가능성 평가

  • Choi, Seung-Hyun (Department of Environmental Engineering, Kunsan National University) ;
  • Kim, Seok-Hwi (Institute for advanced engineering) ;
  • Kim, Kangjoo (Department of Environmental Engineering, Kunsan National University)
  • Received : 2015.11.30
  • Accepted : 2015.12.24
  • Published : 2015.12.28

Abstract

In this study, we investigated the restoration possibility of the old streams by enhancing the rainwater infiltration in the watershed of Deokjin Park, Jeonju City. This study was performed by modeling groundwater discharge to the streams under various conditions. We assessed the amount and location of groundwater recharge enhancement to restore the streams and evaluated whether the baseflows of the restored streams are sufficient to keep the water ecosystem of the Deokjin Pond. The results show that the baseflow of the streams can persist for a longer time even during the dry season when the rainwater drainage system is recovered similarly to the those before development using low impact development (LID) techniques. The enhancements of recharge in the headwater area, which is the area around the zoo and Daeji Village in the Deokjin Park watershed, is useful to increase the baseflows of the downstream reaches. Furthermore, spreaded recharge over a widespread area is better to prevent the streams from drying than the intensive recharge at a few sites.

본 연구에서는 빗물 함양사업을 통하여 전주시 덕진공원 유역 내 옛 하천들의 복원가능성을 검토하였다. 본 연구는 다양한 상황에서의 지하수유출량을 모사하는 방법으로 수행되었다. 덕진연못의 상류유역을 흐르던 하천을 복원한다고 했을 때, 이들이 비강우기에도 유량을 유지하기 위해서는 어디에 얼마만큼의 지하수 함양을 추가로 시켜야 하는 지, 그리고 하천들의 기저유출유량은 덕진연못의 수생태유지에 충분한 지를 지하수모델을 이용하여 평가하였다. 본 연구결과, 덕진연못의 빗물 배수를 저영향개발(low impact development; LID) 사업을 통하여 개발이전과 유사한 빗물배수체계를 만들어 준다면 복원되는 하천들은 갈수기에도 상당기간 기저유출로 유량이 유지될 수 있음을 알 수 있었다. 덕진연못 집수구역의 최상류구역인 동물원과 주변지역에서 지하수 함양을 증가시키는 것이, 하류 대지천의 기저유출 유량을 증가시키는 것에 유리함을 지시한다. 아울러, 몇몇 지점에서의 집중적인 지하수함양보다는 넓은 지역에서 고르게 일어나는 지하수함양이 하천의 건천화 방지에 더 유리한 것으로 나타났다.

Keywords

References

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Cited by

  1. Calculation of Rainwater and Groundwater Fraction in Sewerage: A Case Study in Deokjin Park, Jeonju vol.49, pp.5, 2016, https://doi.org/10.9719/EEG.2016.49.5.361
  2. Measurement of groundwater-surface water exchange rates using seepage meters: A case study of Deokjin Pond in Jeonju-si vol.54, pp.4, 2018, https://doi.org/10.14770/jgsk.2018.54.4.433