최근 이상기후 현상의 증가로 인한 강우양상 변화 및 게릴라성 집중호우의 빈도가 증가하고 있는 실정이다. 본 연구에서는 이러한 영향을 반영하기 위하여 전국 가능최대강수량도1를 이용하여 합천댐 유역의 PMP를 재산정하였다. 그리고 PMF를 추정하기 위하여 2006년에 발생한 태풍 ‘에위니아’ 사상을 이용하여 강우-유출 모델인 HEC-HMS의 매개변수 ...
최근 이상기후 현상의 증가로 인한 강우양상 변화 및 게릴라성 집중호우의 빈도가 증가하고 있는 실정이다. 본 연구에서는 이러한 영향을 반영하기 위하여 전국 가능최대강수량도1를 이용하여 합천댐 유역의 PMP를 재산정하였다. 그리고 PMF를 추정하기 위하여 2006년에 발생한 태풍 ‘에위니아’ 사상을 이용하여 강우-유출 모델인 HEC-HMS의 매개변수최적화 과정을 수행한 후 합천댐 유역의 지속시간별 PMF를 산정하였다. 그 결과를 요약하면 다음과 같다. 1. 전국 가능최대강수량도1를 이용하여 본 연구의 대상유역인 합천댐 유역의 강우 지속시간별(1, 2, 6, 12, 24, 36, 72hr) PMP를 산정한 결과 85.63∼786.54mm 범위로 추정되었다. 2. 합천댐 건설 당시 추정된 강우 지속시간 24시간인 경우 PMP는 519mm, 본 연구에서 추정된 PMP는 628.39mm로 약 21% 증가하는 것으로 나타났다. 이러한 원인은 최근 이상기후 현상의 증가로 인한 게릴라성 집중호우 및 대형 태풍 래습 빈도 등의 영향인 것으로 판단되었다. 3. 본 연구에서 얻어진 PMP를 이용하여 강우 지속시간별 PMF를 산정한 결과 지속시간 12시간인 경우가 12,274.91CMS로 최대값을 나타내었고, 합천댐 건설 당시 산정 8,900CMS와 비교하는 경우 약 33% 증가한 것으로 나타났다. 따라서 합천댐 유역의 PMF를 산정하는 경우 최근 기상현상이 반영된 지속시간 12시간을 적용하는 것이 타당한 것으로 판단된다.
최근 이상기후 현상의 증가로 인한 강우양상 변화 및 게릴라성 집중호우의 빈도가 증가하고 있는 실정이다. 본 연구에서는 이러한 영향을 반영하기 위하여 전국 가능최대강수량도1를 이용하여 합천댐 유역의 PMP를 재산정하였다. 그리고 PMF를 추정하기 위하여 2006년에 발생한 태풍 ‘에위니아’ 사상을 이용하여 강우-유출 모델인 HEC-HMS의 매개변수 최적화 과정을 수행한 후 합천댐 유역의 지속시간별 PMF를 산정하였다. 그 결과를 요약하면 다음과 같다. 1. 전국 가능최대강수량도1를 이용하여 본 연구의 대상유역인 합천댐 유역의 강우 지속시간별(1, 2, 6, 12, 24, 36, 72hr) PMP를 산정한 결과 85.63∼786.54mm 범위로 추정되었다. 2. 합천댐 건설 당시 추정된 강우 지속시간 24시간인 경우 PMP는 519mm, 본 연구에서 추정된 PMP는 628.39mm로 약 21% 증가하는 것으로 나타났다. 이러한 원인은 최근 이상기후 현상의 증가로 인한 게릴라성 집중호우 및 대형 태풍 래습 빈도 등의 영향인 것으로 판단되었다. 3. 본 연구에서 얻어진 PMP를 이용하여 강우 지속시간별 PMF를 산정한 결과 지속시간 12시간인 경우가 12,274.91CMS로 최대값을 나타내었고, 합천댐 건설 당시 산정 8,900CMS와 비교하는 경우 약 33% 증가한 것으로 나타났다. 따라서 합천댐 유역의 PMF를 산정하는 경우 최근 기상현상이 반영된 지속시간 12시간을 적용하는 것이 타당한 것으로 판단된다.
Recently, climatic changes have broken out owing to increase in temperature. Since late in the 1990’s, the main storm rainfall which occurred in Korea have been huge in size and scale as compared with them happened before. Thus, the extent of the damage from flood has been increasing. The destructio...
Recently, climatic changes have broken out owing to increase in temperature. Since late in the 1990’s, the main storm rainfall which occurred in Korea have been huge in size and scale as compared with them happened before. Thus, the extent of the damage from flood has been increasing. The destruction of large-scale hydraulic structures by flood damage could cause social and economic issues seriously such as heavy economic losses and significant casualties in contrast with small-scale them; therefore, basically, flood discharge that does not include excessive danger has been taken into consideration when designing. At this time, usable flood discharge is popularly known as PMP (Probable Maximum Precipitation). PMP can be estimated by the relation between rainfall and runoff. In order to reduce a lot of casualties to men and property caused by strange climate, the safety of existing hydraulic structures, flood-safeguards and control-measures must be established for the structures that will be designed from now on. The process of this study is to select the central coordinates on Hapcheon dam watershed and draw out PMP datum of this area from national PMP map so as to compute PMP on above-mentioned catchment exactly. After the investigation of Huff distribution that is adequate to Hapcheon dam watershed by using estimated PMP, the hyetograph was drawn out for starters, and then this datum were had application to HEC-HMS as rainfall-runoff model. Lastly, the calculated PMP on the watershed was weighted against the past material in those days of dam design. As a result, in the case of estimated rainfall and the duration-24hours in those days of Hapcheon dam construction, PMP was 519 ㎜, while estimated PMP in this study was 628.39 ㎜, consequently, PMP volume up 21 percent. Such cause is judged by frequent strange climate, unforeseeable localized torrential rainfall, and the frequency of large-sized typhoon. Also, in this study, with regard to the duration-12hours, PMP indicated the maximum for 12,274.91 CMS. It volume up about 33 percent, in comparison with 8,900 CMS during dam-construction. Hence, it is appropriate to apply the duration-12hours that recent atmospheric phenomena were reflected with respect to the calculation of PMP on Hapcheon dam watershed.
Recently, climatic changes have broken out owing to increase in temperature. Since late in the 1990’s, the main storm rainfall which occurred in Korea have been huge in size and scale as compared with them happened before. Thus, the extent of the damage from flood has been increasing. The destruction of large-scale hydraulic structures by flood damage could cause social and economic issues seriously such as heavy economic losses and significant casualties in contrast with small-scale them; therefore, basically, flood discharge that does not include excessive danger has been taken into consideration when designing. At this time, usable flood discharge is popularly known as PMP (Probable Maximum Precipitation). PMP can be estimated by the relation between rainfall and runoff. In order to reduce a lot of casualties to men and property caused by strange climate, the safety of existing hydraulic structures, flood-safeguards and control-measures must be established for the structures that will be designed from now on. The process of this study is to select the central coordinates on Hapcheon dam watershed and draw out PMP datum of this area from national PMP map so as to compute PMP on above-mentioned catchment exactly. After the investigation of Huff distribution that is adequate to Hapcheon dam watershed by using estimated PMP, the hyetograph was drawn out for starters, and then this datum were had application to HEC-HMS as rainfall-runoff model. Lastly, the calculated PMP on the watershed was weighted against the past material in those days of dam design. As a result, in the case of estimated rainfall and the duration-24hours in those days of Hapcheon dam construction, PMP was 519 ㎜, while estimated PMP in this study was 628.39 ㎜, consequently, PMP volume up 21 percent. Such cause is judged by frequent strange climate, unforeseeable localized torrential rainfall, and the frequency of large-sized typhoon. Also, in this study, with regard to the duration-12hours, PMP indicated the maximum for 12,274.91 CMS. It volume up about 33 percent, in comparison with 8,900 CMS during dam-construction. Hence, it is appropriate to apply the duration-12hours that recent atmospheric phenomena were reflected with respect to the calculation of PMP on Hapcheon dam watershed.
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