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2021 Vol.63, Issue 5
Assessment of Upland Drought Using Soil Moisture Based on the Water Balance Analysis

물수지 기반 지역별 토양수분을 활용한 밭가뭄 평가

Min-Gi Jeona
,
Won-Ho Namb†
,
Mi-Hye Yangc
,
Young-Sik Mund
,
Eun-Mi Honge
,
Jung-Hun Okf
,
Seonah Hwangg
,
Seung-Oh Hurh
전 민기a
,
남 원호b†
,
양 미혜c
,
문 영식d
,
홍 은미e
,
옥 정훈f
,
황 선아g
,
허 승오h
aPh.D. Student, Department of Convergence of Information and Communication Engineering, Hankyong National University, Anseong, Republic of Korea
bAssociate Professor, School of Social Safety and Systems Engineering, Institute of Agricultural Environmental Science, National Agricultural Water Research Center, Hankyong National University, Anseong, Republic of Korea
cPh.D. Student, Department of Convergence of Information and Communication Engineering, Hankyong National University, Anseong, Republic of Korea
dResearcher, National Agricultural Water Research Center, Hankyong National University
eAssistant Professor, School of Natural Resources and Environmental Science, Kangwon National University, Kangwon, Republic of Korea
fJunior Researcher, Divison of Soil and Fertilizer, National Institute of Agricultural Sciences, Rural Development Administration
gJunior Researcher, Divison of Soil and Fertilizer, National Institute of Agricultural Sciences, Rural Development Administration
hSenior Researcher, Divison of Soil and Fertilizer, National Institute of Agricultural Sciences, Rural Development Administration
a박사 한경대학교 정보통신융합학과 학생, 안성
b한경대학교 국립농업수연구소 농업환경과학원 사회안전시스템공학부 부교수, 안성
c박사 한경대학교 정보통신융합학과 학생, 안성
d한경대학교 국립농업수연구소 연구원
e강원대학교 자연자원환경과학부 조교수
f농촌진흥청 국립농업과학원 토양비료과 주니어연구원
g농촌진흥청 국립농업과학원 토양비료과 주니어연구원
h농촌진흥청 국립농업과학원 토양비료과 선임연구원
† Corresponding author Tel.: +82-31-670-5137, Fax: +82-31-670-5139 E-mail: wonho.nam@hknu.ac.kr
2021. pp. 1-11
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Abstract

Soil moisture plays a critical role in hydrological processes, land-atmosphere interactions and climate variability. It can limit vegetation growth as well as infiltration of rainfall and therefore very important for agriculture sector and food protection. Recently, due to the increased damage from drought caused by climate change, there is a frequent occurrence of shortage of agricultural water, making it difficult to supply and manage stable agricultural water. Efficient water management is necessary to reduce drought damage, and soil moisture management is important in case of upland crops. In this study, soil moisture was calculated based on the water balance model, and the suitability of soil moisture data was verified through the application. The regional soil moisture was calculated based on the meteorological data collected by the meteorological station, and applied the Runs theory. We analyzed the spatiotemporal variability of soil moisture and drought impacts, and analyzed the correlation between actual drought impacts and drought damage through correlation analysis of Standardized Precipitation Index (SPI). The soil moisture steadily decreased and increased until the rainy season, while the drought size steadily increased and decreased until the rainy season. The regional magnitude of the drought was large in Gyeonggi-do and Gyeongsang-do, and in winter, severe drought occurred in areas of Gangwon-do. As a result of comparative analysis with actual drought events, it was confirmed that there is a high correlation with SPI by each time scale drought events with a correlation coefficient.

Keywords
Soil moisture
drought
upland crops
water balance model
Standardized Precipitation Index (SPI)
References

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Information
  • Publisher :The Korean Society of Agricultural Engineers
  • Publisher(Ko) :한국농공학회
  • Journal Title :Journal of Korean Society of Agricultural Engineers
  • Journal Title(Ko) :한국농공학회논문집
  • Volume : 63
  • No :5
  • Pages :1-11
  • Received Date : 2021-04-26
  • Revised Date : 2021-06-21
  • Accepted Date : 2021-06-21
  • DOI :https://doi.org/10.5389/KSAE.2021.63.5.001
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