• 대한원격탐사학회지
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• 제37권4호
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• pp.815-831
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• 2021

Drought forecasting is crucial to minimize the damage to food security and water resources caused by drought. Satellite-based drought research has been conducted since 1980s, which includes drought monitoring, assessment, and prediction. Unlike numerous studies on drought monitoring and assessment for the past few decades, satellite-based drought forecasting has gained popularity in recent years. For successful drought forecasting, it is necessary to carefully identify the relationships between drought factors and drought conditions by drought type and lead time. This paper aims to provide an overview of recent research trends and challenges for satellite-based drought forecasts focusing on lead times. Based on the recent literature survey during the past decade, the satellite-based drought forecasting studies were divided into three groups by lead time (i.e., short-term, sub-seasonal, and seasonal) and reviewed with the characteristics of the predictors (i.e., drought factors) and predictands (i.e., drought indices). Then, three major challenges-difficulty in model generalization, model resolution and feature selection, and saturation of forecasting skill improvement-were discussed, which led to provide several future research directions of satellite-based drought forecasting.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회 논문집
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• pp.1481-1485
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• 2005

This study aims at establishing master plan for efficient establishment of comprehensive drought management information system as non-structural drought counterplan which provides drought damage in advance. Domestic and abroad research related to drought were surveyed and analyzed through many literature and internet for systematic drought management information system. Long-term master plan for comprehensive drought management information system is divided into 3 steps. In first step, drought monitoring system including development of hydrological drought assessment index, drought outlook analysis method and GIS web based drought monitering system is established. In second step, water supply plan and guideline through water shortage danger assessment by areal characteristics is established. In third step, comprehensive management information system through export system linked to KORSIM and establishment of information shared system between each bureau related to drought. Based on this study, master plan for efficient development and application of drought management information system is proposed, it is expected to be applied as guideline for second and third step of drought management information system.

• 자원환경지질
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• 제54권6호
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• pp.649-657
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• 2021

This paper aims to study the impact of natural disasters on per capita income in Vietnam both the short and long-term, specifically impact loss of income caused by the extreme drought 2013 for agriculture, forestry and fishery in Phu Yen Province, Central Vietnam. The study valued economic damage by applying the synthetic control method (SCM), which is a statistical method to evaluate the effect of an intervention (e.g. natural disasters) in different case studies. It estimates what would have happened to the treatment group if it had not received the treatment by constructing a weighted combination of control units (e.g. control provinces). The results showed that the 2013 drought caused a decrease in income per capita, mainly in the agriculture, forestry, and fishery sector in Phu Yen. The reduced income was estimated to be VND 160,000 (1 USD = 23,500 VND (2021)) for one person per month, accounting for 11% of total income per capita and continued to affect the income 6 years later. Therefore, authorities need to invest in preventive solutions such as early and accurate warnings to help people to be more proactive in disaster prevention.

• 한국농공학회지
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• 제30권1호
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• pp.31-37
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• 1988

This study, based on the monthly rainfall data, was carried out to determine the agricultural drought index which enables to describe the regional and seasonal drought characteristics of rice cropping system in Korea. The results obtained were summarized as follows ; 1.A new agricultural drought index (ADI) was evaluated seasonally according to the product of drought intensity and duration. This ADI is proposed as standard design criterion for irrigation planning. 2.The relationship between agricultural drought index and return periods was figured out. These diagrams could be used to estimate the seasonal drought severity of a certain year and to select design year corresponding to the specific drought frequency. 3.The regional drought characteristics were classified and those are useful to determine proper rice varieties and planting time and make drought counterplans. 4.Spring drought occurred once in 3 or 4 years and in a regional respect, rather frequently occurred in Seoul and Daegu areas than in Busan, Daejeon, Kwangju and Chuncheon areas. Summer drought occurred once in 5 years in Daegu and Busan areas and once in 7 or 8 years in other areas. 5.Sequential drought which gave severe drought damage of rice production occurred once in 20 years in Daegu area and in 10 years in Kwangju area.

• 한국수자원학회논문집
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• 제55권8호
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• pp.589-601
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• 2022

가뭄은 자연적 현상이지만, 지역의 물리적 및 사회적 요소와 결합되어 피해가 발생한다. 특히, 각종 용수 공급 및 수요과 연관되어 사회 경제적으로 큰 피해를 야기시킨다. 비슷한 심도의 기상학적 가뭄에도 지역의 특성과 용수공급체계에 따라 실제로 발생하는 가뭄 피해는 다르다. 본 연구에서는 지역의 사회·경제적 인자와 용수공급체계를 고려하여 가뭄 위험도를 평가하였다. 노출성은 용수공급 과부족량을 나타내는 결합가뭄관리지수(JDMI)를 등급화하여 평가하였다. 취약성은 가뭄에 영향을 받는 10개의 사회·경제적 인자에 엔트로피, PCA 및 GMM를 적용하여 가중평균하여 평가하였다. 대응능력은 지역의 용수능력을 나타내는 인자들을 베이지안 네트워크에 적용하여 평가하였다. 위험도는 노출성, 취약성 및 대응능력을 통합하여 결정하였다. 용수공급 실패 사상의 발생 가능성을 의미하는 가뭄 노출성을 평가한 결과, 괴산군이 0.81로 가장 높게 나타났다. 가뭄 취약성의 경우, 대전광역시가 0.61로 매우 취약한 것으로 나타났다. 지역의 용수공급체계가 고려된 가뭄 대응능력을 평가한 결과, 세종시가 가뭄 대응능력이 가장 낮은 것으로 나타났다. 마지막으로 위험도를 평가한 결과, 청주시가 가장 높게 나타났다. 이러한 결과를 통해 가뭄에 대한 위험 및 취약 원인을 파악하였으며, 향후 지역의 특성을 고려한 가뭄 피해 저감 정책 마련이 가능하다.

• 한국농공학회논문집
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• 제62권2호
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• pp.97-109
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• 2020

Drought is one of the most influential disasters in sustainable agriculture and food security of nations. In order to preemptively respond to agricultural droughts, vulnerability assessments were conducted to predict the possibility of drought in the region, the degree of direct or indirect damage, and the ability to cope with the damage. Information on agricultural drought vulnerability status of different regions is extremely useful for implementation of long term drought management measures. The purpose of this study is to develop and implement a quantitative approach for measuring agricultural drought vulnerability at sub-district level based on agricultural water and reservoirs. To assess the vulnerability in a quantitative manner and also to deal with different physical and socioeconomic data on the occurrence of agricultural drought, we selected the appropriate factors for the assessment of agricultural drought vulnerability through preceding studies, and analyzed the meteorological and agricultural reservoir data from 2015 to 2018. Each item was weighted using AHP (Analytic Hierarchy Process) analysis and evaluated through the agricultural drought vulnerability estimation. The entire national vulnerability assessments showed that Ganghwa, Naju, and Damyang were the most vulnerable to agricultural droughts. As a result of analyzing spatial expression, Gyeongsang-do is relatively more vulnerable to drought than Gangwon-do and Gyeonggi-do. The results revealed that the methodology and evaluation items achieved good performance in drought response. In addition, vulnerability assessments based on agricultural reservoir are expected to contribute supporting effective drought decisions in the field of agricultural water management.

• 한국농공학회논문집
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• 제53권6호
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• pp.165-170
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• 2011

Recently natural disasters such as the frequency and intensity of drought have been increasing as a result of climate change. This study suggests a drought index, WADI (Water Availability Drought Index), that considers water availability using 6 components (water intake, groundwater level, agricultural reservoir water level, dam inflow, streamflow, and precipitation) using the Z score and data monitoring on a nationwide level. SPI (Standardized Precipitation Index) was applied in coastal area. For the severe droughts of 2001 spring and 2008 autumn, the index was evaluated by comparison with reported damage areas. suggested to combine The spatial concordance rate of WADI in 2001 and 2008 for estimation of the degree of drought severity was 50 % and 24 % compared to the actual recorded data respectively.

• 한국관개배수논문집
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• 제19권1호
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• pp.97-105
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• 2012

This study aimed to evaluate the vulnerability to different natural hazards such as flood, drought, and abnormal climate, and to classify the vulnerability patterns in Gyeongsangnam-do. The damage records and annual budgets during 2000 to 2009 were collected and were ranked for all twelve si-guns. Sancheong-gun and Hamyang-gun resulted in the most vulnerable to flood and drought damages, and Hadong-gun and Yangsan-si were most damaged from abnormal climate such as heavy snow and heavy wind. In addition, three clusters were classified by using Ward's method, and were interpreted. The results showed that the western areas of Gyeongsangnam-do might be more vulnerable to flood damage while drought might threaten the eastern si-guns.

• 한국습지학회지
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• 제8권1호
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• pp.49-58
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• 2006

가뭄은 인간이 극복하기 힘든 자연재해로 시간규모가 다양하고 누적된 효과가 천천히 나타나기 때문에 인지가 어려우며 이로 인해 피해가 커지는 경향이 있다(최영진, 1995). 가뭄에 적절히 대처하기 위해서는 가뭄의 감시(Monitoring) 체계가 필요하고, 객관적이고 널리 적용될 수 있는 가뭄의 정의와 가뭄의 정도를 정량적으로 나타낼 수 있는 지표가 필요하다. 기상학 및 수자원에서는 가뭄 감시를 위해 현 상태에 대한 정량적인 가뭄심도를 나타내는 가뭄지수를 사용하고 있으며 원격탐사 분야에서는 다중시기의 식생지수 및 지표면 열지수 등을 활용하여 가뭄여부를 판단하는 노력을 수행하고 있다. 본 연구에서는 과거 10년간 남한의 가뭄시점에 대한 가뭄지수 분석을 통하여 가뭄의 심도를 파악하였고, 정규식생지수(NDVI)와 식생상태지수(VCI)를 활용하여 가뭄현황을 판별하였다. 또한, 식생지수와 가뭄지수의 상관성분석을 통하여 식생지수를 이용한 정량적인 가뭄분석의 가능성을 모색하였다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2012년도 학술발표회
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• pp.458-458
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• 2012

Climate extreme variability is a major cause of disaster such as flood and drought types occurred in Korea and its effects is also more severe damage in last decades which can be danger mature events in the future. The main aim of this study was to assess the effectives of climate change on drought for an agriculture as Nakdong basin in Korea using climate change data in the future from data of General Circulation Models (GCM) of ECHO-G, with the developing countries like Korea, the developed climate scenario of medium-high greenhouse gas emission was proposed of the SRES A2. The Standardized Precipitation Index (SPI) was applied for drought evaluation. The drought index (SPI) applied for sites in catchment and it is evaluated accordingly by current and future precipitation data, specific as determined for data from nine precipitation stations with data covering the period 1980-2009 for current and three periods 2010-2039, 2040-2069 and 2070-2099 for future; time scales of 3month were used for evaluating. The results determined drought duration, magnitude and spatial extent. The drought in catchment act intensively occurred in March, April, May and November and months of drought extreme often appeared annual in May and November; drought frequent is a non-uniform cyclic pattern in an irregular repetitive manner, but results showed drought intensity increasing in future periods. The results indicated also spatial point of view, the SPI analysis showed two of drought extents; local drought acting on one or more one of sites and entire drought as cover all of site in catchment. In addition, the meteorology drought simulation maps of spatial drought representation were carried out with GIS software to generate for some drought extreme years in study area. The method applied in this study are expected to be appropriately applicable to the evaluation of the effects of extreme hydrologic events, the results also provide useful for the drought warning and sustainable water resources management strategies and policy in agriculture basins.