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NTIS 바로가기한국물환경학회지 = Journal of Korean Society on Water Environment, v.36 no.5, 2020년, pp.353 - 363
최정현 (부경대학교 지구환경시스템과학부 (환경공학전공)) , 이옥정 (부경대학교 환경공학과) , 원정은 (부경대학교 지구환경시스템과학부 (환경공학전공)) , 김상단 (부경대학교 환경공학과)
Hydrologic models can be classified into two types: those for understanding physical processes and those for predicting hydrologic quantities. This study deals with how to use the model to predict today's stream flow based on the system's knowledge of yesterday's state and the model parameters. In t...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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수문모형은 무엇에 의해 정의되는가? | 수문모형은 일반적으로 매개변수 및 상태(state)에 의해 정의된다. 매개변수는 지표면 및 지표하의 물리적인 특성으로, 일반적으로 시간 불변인 것으로 간주되며, 상태는 모형이 채택한 수문 프로세스에 의해 시간에 따라 변화되는 물의 흐름이나 저장된 물의 양을 의미한다. | |
사후분포의 적절한 수렴 여부를 판단하기 위해서는 매개변수의 민감도 분석이 선행되어야 가능할 것 이라고 주장하는 근거는? | 두 번째 원인으로는 매개변수의 유출모의에 대한 민감도이다. 유출모의에 영향력이 크지 않는 매개변수는 어떠한 값이 추정되더라고 결과에 미치는 영향이 작기 때문에 넓은 범위의 매개변수 사후분포가 형성될 수밖에 없다. 따라서 사후분포의 적절한 수렴 여부를 판단하기 위해서는 매개변수의 민감도 분석이 선행되어야 가능할 것이다. | |
수문모형에서 매개변수는? | 수문모형은 일반적으로 매개변수 및 상태(state)에 의해 정의된다. 매개변수는 지표면 및 지표하의 물리적인 특성으로, 일반적으로 시간 불변인 것으로 간주되며, 상태는 모형이 채택한 수문 프로세스에 의해 시간에 따라 변화되는 물의 흐름이나 저장된 물의 양을 의미한다. 매개변수, 토양수분의 초기조건, 강수량 및 잠재증발산산과 같은 외력의 불확실성은 수문예측에 상당한 오차를 유발한다. |
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