• 한국산림과학회지
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• 제103권3호
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• pp.383-391
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• 2014

본 연구는 주지하수 감수곡선을 이용하여 산림소유역의 유출특성을 밝히기 위하여 수행하였다. 2003년부터 2011년까지 9년간 관측한 강우-유출량 자료를 이용하여 수문곡선 감수부의 시계열 변화를 분석하였다. 그 결과 산림소유역에서는 직접유출 감수계수가 기저유출의 감수계수 값보다 작았다. 또한 산림소유역에서의 직접유출량은 대유역에 비해 상당히 적은 양을 보였으며, 기저유출량은 차이가 크지 않았다. 시험유역에서 주지하수 감수곡선의 회귀식과 감수계수는 각각 $y=0.7528e^{-0.022x}$($R^2=0.8938$, 범위는 0.3 mm~0.8 mm), K = 0.978로 산출되었다. 주지하수 감수곡선과 연유출량과는 관련성이 큰 것으로 나타났는데, 유출량이 많으면 주지하수 감수곡선의 기울기가 완만해지고, 유출량이 줄어들면 감수곡선의 기울기가 급해지는 것으로 나타났다. 또한 해를 거듭할수록 주지하수 감수곡선의 기 울기가 완만해지는 경향이 나타나, 점차 기저유출량이 증가하는 것으로 판단하였다. 따라서 시험유역에서는 시간의 경과와 함께 산림의 홍수조절기능 및 수원함양기능이 점진적으로 높아지는 것으로 나타났다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제6권3호
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• pp.61-71
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• 2001

A regional master recession curve model to predict groundwater discharges in a given basin was presented. Considering a stream-aquifer system, both theoretical and experimental baseflow equations were compared and a practical groundwater discharge equation was derived, The groundwater discharge equation was expanded and transformed to the discharge equation at the basin exit. For practical use, the equation was expressed as a function of watershed area, the mean slope of basin and the recession constant. To verify the model, the model was applied to Ssang-chi basin where long-term and temporal hydrological data at the upper basin were collected. Our results show that a master recession curve of unmeasured area can be predicted.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2018년도 학술발표회
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• pp.317-317
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• 2018

Baseflow which is one of the unmeasurable components of streamflow and slowly flows through underground is important for water resource management. Despite various separation methods from researches preceded, it is difficult to find a significant separation method for baseflow separation. This study applied the MRC method and developed the improved approach to separate baseflow from total streamflow hydrograph. Previous researchers utilized the whole streamflow data of study period at once to derive synthetic MRCs causing unreliable results. This study has been proceeded with total nine areas with gauging stations. Each three areas are selected from 3 domestic major watersheds. Tool for drawing MRC had been used to draw MRCs of each area. First, synthetic MRC for whole period and two other MRCs were drawn following two different criteria. Two criteria were set by different conditions, one is flow condition and the other is seasonality. The whole streamflow was classified according to seasonality and flow conditions, and MRCs had been drawn with a specialized program. The MRCs for flow conditions had low R2 and similar trend to recession segments. On the other hand, the seasonal MRCs were eligible for the baseflow separation that properly reflects the seasonal variability of baseflow. Comparing two methods of assuming MRC for baseflow separation, seasonal MRC was more effective for relieving overestimating tendency of synthetic MRC. Flow condition MRCs had large distribution of the flow and this means accurate MRC could not be found. Baseflow separation using seasonal MRC is showing more reliability than the other one however, if certain technique added up to the flow condition MRC method to stabilize distribution of the streamflow, the flow conditions method could secure reliability as much as seasonal MRC method.