KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Development of Operating Rule Curve for Multipurpose Water Supply in Heightened Agricultural Reservoir

농업용 둑높임저수지의 다중 용수공급을 위한 이수운영기준곡선 개발

  • 박종윤 (건국대학교 대학원 사회환경시스템공학과) ;
  • 정인균 (건국대학교 대학원 사회환경시스템공학과) ;
  • 이광야 (한국농어촌공사 농어촌연구원) ;
  • 김성준 (건국대학교 생명환경과학대학 사회환경시스템공학과)
  • Received : 2012.08.31
  • Accepted : 2013.04.24
  • Published : 2013.07.30
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Abstract

This study developed an operating rule curve (ORC) for multipurpose water supply (irrigation and environmental water) in heightened agricultural reservoir. Among the 20 reservoirs in improvement project of agricultural reservoir dam heightening, the 4 representative reservoirs (Ungyang, Gungchon, Yongam and Unam) were selected for the study according to the analysis of statistical characteristics. Available environmental water supply amounts during irrigation and non-irrigation periods, which is the range from release restricted water level to high water level were estimated by water balance analysis using reservoir operation model. Reliability, resiliency and vulnerability criteria for water system performance were used to assess the multiple water supply capacity. The ORC was presented as the percentile rank for the daily reservoir water level from the results of reservoir operation using the past couple of decades weather data. The water levels for each percentile were divided into 3 buffer sections representing drought (5~25%), normal (25~75%), and flood (75~95%) year to operate the heightened agricultural reservoir with ORC.

본 연구에서는 농업용 둑높임저수지의 다중용수공급능력(관개 및 하천유지용수) 평가에 따른 이수운영기준곡선을 개발하였다. 20개 둑높이기 사업지구를 대상으로 특성분석에 따른 4개(웅양, 궁촌, 용암, 운암)의 대표 저수지를 선정하고, 이수운영모형을 이용한 물수지분석을 통해 하천유지용수 공급 가능량을 산정하였다. 이수운영기준은 관개기와 비관개기에 대해 방류제한수위(사업전 만수위)에서 상시만수위까지의 저수위구간을 하천유지용수공급 가능 수위로 설정하고 신뢰도, 회복도 및 취약도 지수를 이용하여 각 둑높임저수지 특성별 물공급 능력을 평가하였다. 이수운영기준 적용에 따른 둑높임저수지의 이수운영기준곡선은 과거 이수운영모의결과로부터 일별 저수위를 백분위(Percentile Rank)로 표현하였다. 각 분위별 저수위 구간을 3개의 완충구간(Buffer)으로 나누어 갈수년(5~25%), 평수년(25~75%) 및 풍수년(75~95%)에 해당하는 저수지 운영이 가능하도록 하였다.

Keywords

References

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