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NTIS 바로가기Journal of Korea Water Resources Association = 한국수자원학회논문집, v.52 no.5, 2019년, pp.325 - 335
전종안 (APEC 기후센터 기후사업본부) , 김대하 (APEC 기후센터 기후사업본부)
To characterize historical droughts in the conterminous United States (CONUS), we estimated the actual evapotranspiration (
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
가뭄이란? | 가뭄은 반복적인 자연재해로써 생태계 수문순환에 불균 형을 초래하기도 한다(Dai, 2011; Heim, 2002). 일반적으로 가뭄은 비정상적으로 부족한 강수량에서 시작되는 것으로 간주되고, 사회나 생태계의 수요보다 공급할 수 있는 수량이 작은 상태로 정의된다(Wilhite, 2000). 세계기상기구(World Meteorological Organization; WMO)는 가뭄을 “비정상적으로 지속되는 강수부족”으로 정의하고 있는데(WMO, 1992), 이와 같은 연장선에서 가뭄에 대한 많은 연구가 강수 부족을 중심으로 해석하는데 국한되어 있다(예, Strzepek et al. | |
GCR의 장점은 무엇인가? | , 2012). GCR은 지면모형에 비해 훨씬 단순한 모형이지만, ETa의 추정에 있어서 지면모형이 고려하지 못하는 대규모 관개활동 등이 반영 될 수 있는 장점이 있다(Szilagyi, 2018). 지면모 형과 GCR이론에 의해 추정한 ETa 사이에 Pearson r=0. | |
강수량이 실제증발산량에 어떤 영향을 주는가? | 특히, 지표수문모형을 이용해 실제증발산량을 추정하는 경우, 침투, 유출과 같은 강수에 영향을 직접적으로 받는 지표수문과정이 개입되기 때문에 강수량 자료의 사용을 피할 수 없다(Kim and Rhee, 2016). 따라서 실제증발산량 추정치는 강수 자료 특성에 직접적 영향을 받게 되며, 기후 예측자료가 사용될 경우, 추정된 실제증발산량은 강수의 낮은 예측성으로 인해 그 사용성이 매우 제한적일 수밖에 없다(Gao et al., 2010). |
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