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NTIS 바로가기한국농공학회논문집 = Journal of the Korean Society of Agricultural Engineers, v.60 no.6, 2018년, pp.121 - 131
윤동현 (Department of Bioresources and Rural Systems Engineering, Hankyong National University, Anseong, Republic of Korea) , 남원호 (Department of Bioresources and Rural Systems Engineering, Institute of Agricultural Environmental Science, Hankyong National University, Anseong, Republic of Korea) , 이희진 (Department of Bioresources and Rural Systems Engineering, Hankyong National University, Anseong, Republic of Korea) , 홍은미 (School of Natural Resources and Environmental Science, Kangwon National University, Chuncheon, Republic of Korea) , 김태곤 (Institute on the Environment, University of Minnesota) , 김대의 (Rural Research Institute, Korea Rural Community Corporation, Ansan, Republic of Korea) , 신안국 (Rural Research Institute, Korea Rural Community Corporation, Ansan, Republic of Korea)
Climate change has caused changes in environmental factors that have a direct impact on agriculture such as temperature and precipitation. The meteorological disaster that has the greatest impact on agriculture is drought, and its forecasts are closely related to agricultural production and water su...
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가뭄 시작 시기 확인 및 단기적인 가뭄의 빠른 예측은 가뭄판단에 중요한 요소이며, 본 연구에서는 지수들의 가뭄 민감도를 비교하기 위해 전국 평균값을 활용하여 가뭄 시작 시기를 분석하였다. 가뭄 경향이 확인되었던 ESI 및 VHI와 가뭄 경향이 확인되지 않았던 NDVI, EVI, VHI를 구분하여 Fig.
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
ESI는 무엇인가? | ESI는 기상인자 (대기 온도, 대기압, 태양복사량, 상대습도 등)에 의해 발생하는 실제 증발산 (Evapotranspiration, ETa)과 잠재증발산 (Reference evapotranspiration, ETo)의 비를 이용하여 표준화된 아노말리 (standardized anomalies)를 지수화한 지표이며 (Anderson et al., 2015), 가뭄 모니터링 및 토양 수분기반 가뭄지수 산정에 있어 적합하다 (Anderson et al. | |
가뭄지수는 어떤 것들이 있는가? | , 2012), 가뭄을 정량화하고 대상 가뭄 지역의 특성을 파악하여 반영하는 것이 중요하다 (Wilhite and Glantz, 1985). 전 세계적으로 다양한 가뭄지수가 개발되어 가뭄판단에 활용되고 있으며, 대표적인 가뭄지수로는 표준강수지수 (Standard Precipitation Index, SPI), 파머가뭄 심도지수 (Palmer Drought Severity Index, PDSI), 표준강수증 발산지수 (Standardized Precipitation Evapotranspiration Index, SPEI), 토양수분지수 (Soil Moisture Index, SMI) 등이 있다 (Hong et al., 2015; Nam et al. | |
식생을 기반으로 한 지수가 단기적인 가뭄판단보다 장기간 가뭄을 파악하는데 더 적합한 이유는 무엇인가? | 식생을 기반으로 한 지수의 경우 온도, 바람 및 복사에너지 등이 고려되지 않기 때문에 식생의 조밀도 및 포화도, 토양반사, 식생의 종류 등에 따라 적용성에 차이가 발생하며, 가뭄판단에 있어 가뭄으로 인한 식생의 활력도 및 상태가 변할 때까지 시간이 소요된다. 즉, 가뭄 초기 및 단기적인 가뭄판단보다 장기간 가뭄을 파악하는데 더 적합하다. |
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