호우의 이동 방향을 고려한 홍수유출 해석 : 낙동왜관 유역을 중심으로 = The flood discharge analysis considering the direction of rainfall

다국어 초록 (Multilingual Abstract)

In this study, the runoff analysis was carried out using the Clark unit hydrograph considering the storm direction. The flow direction of the rainfall event was analyzed for the parallel direction, the opposite direction and the vertical direction of the stream. For each case, a modified Clark unit hydrograph was generated and analyzed after the outflow analysis and compared with the results obtained using the general Clark unit hydrograph.
First, the runoff analysis was performed on a virtual watershed. Huff's 2nd quartile was used to generate hyetograph. In order to investigate the influence of the direction of the rainfall event, we analyzed the results by changing the size of the basin, the duration, the return period, and the velocity of the rainfall event.
For the runoff analysis for the target watershed, both Huff storm and real rainfall event obtained by Huff method. First, we used the virtual storm events to investigate various results that occur when the return period, the duration, and the movement speed of the rainfall event are different in the target watershed. After that, we examined the result of actual rainfall. Observed flow, results obtained using general Clark unit hydrograph, and results obtained by considering the movement of rainfall event were compared and analyzed.
As a result, when the direction of the rainfall event was taken into consideration, it was confirmed that the shape of the outflow hydrograph, the peak flow rate and the peak time were significantly changed. The difference of the runoff response is affected by the change of the speed and duration of rainfall event.

목차 (Table of Contents)

• 1. 서론 1
• 2. 기본 이론 및 방법 3
• 2.1 Clark 단위도 기본 이론 3
• 2.2 GIUH 기본이론 6
• 3. 호우의 이동 특성에 따른 단위도의 변화 9
• 4. 가상 유역에서의 유출해석 16
• 4.1 가상 유역 16
• 4.2 호우사상 17
• 4.3 유출해석 결과 18
• 5. 대상 유역에서의 유출해석 20
• 5.1 대상 유역 및 호우사상 20
• 5.1.1 대상 유역 20
• 5.1.2 호우사상 21
• 5.2 대상 유역에 대한 시간-면적곡선 24
• 5.3 유출해석 결과 25
• 5.3.1 가상 호우사상을 이용한 유출해석 25
• 5.3.2 실제 호우사상을 이용한 유출해석 30
• 6. 결론 36
• 7. 참고문헌 38