한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제55권12호
  • /
  • Pages.999-1009
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  • 2022
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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물부족 지역에서 샌드댐 설치에 의한 장기 물공급 개선 효과 분석

Analysis of the effect of long-term water supply improvement by the installation of sand dams in water scarce areas

  • 정일문 (한국건설기술연구원 수자원하천연구본부) ;
  • 이정우 (한국건설기술연구원 수자원하천연구본부) ;
  • 이정은 (한국건설기술연구원 수자원하천연구본부) ;
  • 김일환 (한국건설기술연구원 수자원하천연구본부)
  • Chung, Il-Moon (Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Jeongwoo (Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Jeong Eun (Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Il-Hwan (Korea Institute of Civil Engineering and Building Technology)
  • 투고 : 2022.10.15
  • 심사 : 2022.10.25
  • 발행 : 2022.12.31
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초록

춘천 물로리 지역은 지방상수도가 보급되지 않은 물복지 소외지역으로 복류수 및 지하수를 수원으로 하는 소규모 급수시설로 마을에 물을 공급하고 있다. 가뭄시 물부족 문제를 해결하고 증가하는 물수요에 대비하기 위해 계곡에 연하여 샌드댐을 설치하였으며, 2022년 5월부터 이 시설을 운영하고 있다. 본 연구에서는 과거 가뭄시 샌드댐이 있을 경우의 물공급 신뢰도를 평가하기 위해 MODFLOW모형을 이용한 지하수유출량 모의결과를 활용하여 미계측 기간인 2011년부터 2020년까지의 유입량 자료를 생성하였다. 기존 취수원과 샌드댐이 위치한 곳의 상류부 유역에 대해 SWAT-K 유역수문모델링을 수행하여 지하수유출량을 산정하고, 2021년 월별 지하수유출량에 대한 그 이전 10년 동안의 각 월별 지하수유출량의 상대적 비율을 구한 후 2021년 유입량 시계열 자료에 이 비율을 적용하여 2011년부터 2020년까지의 과거 유입량 자료를 생성하였다. 수요량 20 m3/일, 50 m3/일, 100 m3/일 세 가지 경우에 대해 과거 극한 가뭄시의 물공급 가능여부를 분석한 결과, 샌드댐 설치로 물공급 신뢰도가 증가하는 것을 확인 할 수 있으며, 수요량 100 m3/일인 경우에는 기존 취수원과 샌드댐을 연계 운영해야만 신뢰도 90%를 넘는 것으로 분석되었다. 세 가지 운영조건 모두 물공급 신뢰도 95%를 기준으로는 수요량 50 m3/일 이상, 신뢰도 99%를 기준으로는 수요량 30 m3/일 이상을 만족하는 것으로 평가되었다.

The Chuncheon Mullori area is an underprivileged area for water welfare that does not have a local water supply system. Here, water is supplied to the village by using a small-scale water supply facility that uses underground water and underground water as the source. To solve the problem of water shortage during drought and to prepare for the increasing water demand, a sand dam was installed near the valley river, and this facility has been operating since May 2022. In this study, in order to evaluate the reliability of water supply when a sand dam is assumed during a drought in the past, groundwater runoff simulation results using MODFLOW were used to generate inflow data from 2011 to 2020, an unmeasured period. After performing SWAT-K basin hydrologic modeling for the watershed upstream of the existing water intake source and the sand dam, the groundwater runoff was calculated, and the relative ratio of the monthly groundwater runoff for the previous 10 years to the monthly groundwater runoff in 2021 was obtained. By applying this ratio to the 2021 inflow time series data, historical inflow data from 2011 to 2020 were generated. As a result of analyzing the availability of water supply during extreme drought in the past for three cases of demand 20 m3/day, 50 m3/day, and 100 m3/day, it can be confirmed that the reliability of water supply increases with the installation of sand dams. In the case of 100 m3/day, it was analyzed that the reliability exceeded 90% only when the existing water intake source and the sand dam were operated in conjunction. All three operating conditions were evaluated to satisfy 50 m3/day or more of demand based on 95% reliability of water supply and 30 m3/day or more of demand based on 99% of reliability.

키워드

과제정보

본 결과물은 환경부의 재원으로 한국환경산업기술원의 수요대응형 물공급 서비스사업의 지원을 받아 연구되었습니다(과제번호 146525).

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