가능최대홍수량 적용에 따른 농업용저수지의 수문학적 안정성 분석 = Analysis on hydrologic stability of agricultural reservoir using probable maximum flood

다국어 초록 (Multilingual Abstract)

With industrialization and urbanization proceeded nationwide there could be a risky potential which would cause extensive flood disasters. Therefore, it brings up a concept for flood control and water management of agricultural reservoirs.
This study re-exams hydrologic stability on spillway outlet capacity of agricultural reservoirs using hydrologic data with current rainfall condition instead of project hydrologic data applied at design on 4 reservoirs located in Chungbuk province with catchment area of more than 25km2 and storage of more than 5,000,000m3
Flood control of selected reservoirs has been examined focused on return period flood and PMF under the current circumstances. Hydrologic stability has been examined through flood tracking while the early management ground water level by each method uses full supply level and management uses Automatic Reservoir Operation method.
Also, hydrologic stability has been examined through tracking flood level by calculating spillway the amount of the outflow with a water level change while recalculating project hydrologic data using PMP by selected reservoirs with FCSR (Flood Control System for Reservoir).
Criteria to judge hydrologic stability is that maximum water level by PMF shall not overflow dam body and have enough freeboard; in opposite case it is judged there are some problems.
Considering that design flood and flood inflow of PMP is extream situation of reservoirs about gate control hydrologic stability of reservoirs has been examined by peak stage in case of spilling within the limit of the outflow capacity of spillway according to change of low water level.
The results of this study are as follows :

1. It is concluded that all the selected reservoirs are not hydrologically stable and therefore structural measures including the extension of spillway and non structural measures should be taken.
2. Continuous basic plan for river maintenance including additional bank reinforcement to bottom river shall be carried out.
3. Due to high peak flood with more than 150%∼290% compared to 200 year frequency probability flood which was design standard of the past in view of the results of calculating PMF according to revised design standard for reservoirs, there could a problem for securing rationality in case of applying PMF with design flood. Therefore, hydrological stability, construction, and maintenance cost shall be synthetically studied and reasonal application shall be made if the decision is made on applying PMF with design flood.

목차 (Table of Contents)

• Ⅰ. 서론 1
• Ⅱ. 연구사 3
• 2.1 국내 연구 동향 3
• 2.2 국외 연구 동향 6
• Ⅲ. 이론분석 및 모형 선정 9
• 3.1 단위도 9
• 3.1.1 Clark 유역추적법 10
• 3.1.2 SCS 합성단위도법 14
• 3.1.3 Nakayasu 종합단위도법 17
• 3.2 농업용저수지 치수관리시스템 모형 20
• Ⅳ. 적용 대상유역 및 연구방법 23
• 4.1 대상저수지 23
• 4.1.1 제원 23
• 4.1.2 유역개황 23
• 4.2 기후 및 기상 26
• 4.2.1 강우량 26
• 4.2.2 기온 27
• 4.2.3 상대습도 및 증발량 27
• 4.2.4 풍속 28
• 4.3 연구 방법 30
• Ⅴ. 결과 및 고찰 32
• 5.1 설계홍수량 산정 32
• 5.1.1 확률강우량 32
• 5.1.2 가능최대강수량 33
• 5.1.3 강우의 시간적 분포 34
• 5.1.4 홍수량 산정 40
• 5.2 수문학적 안정성 분석 41
• 5.2.1 백곡저수지 41
• 5.2.2 미호저수지 43
• 5.2.3 비룡저수지 44
• 5.2.4 원남저수지 45
• 5.2.5 저수지별 분석 결과 46
• Ⅵ. 결론 48
• 참고문헌 49