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2021 Vol.63, Issue 6 Preview Page
Estimation of Crop Water Requirement Changes Due to Future Land Use and Climate Changes in Lake Ganwol Watershed

간월호 유역의 토지이용 및 기후변화에 따른 논밭 필요수량 변화 추정

Sinae Kima
,
Seokhyeon Kimb
,
Soonho Hwangc
,
Sang-Min Junc
,
Jung-Hun Songd
,
Moon-Seong Kange†
김 시내a
,
김 석현b
,
황 순호c
,
전 상민c
,
송 정헌d
,
강 문성e†
aM.S. Student, Department of Rural Systems Engineering, Seoul National University
bPh.D. Student, Department of Rural Systems Engineering, Seoul National University
cResearch Professor, Research Institute of Agriculture and Life sciences, College of Agriculture and Life Sciences, Seoul National University
dResearch Scholar, Department of Agricultural and Biological Engineering & Tropical Research and Education Center, University of Florida
eProfessor, Department of Rural Systems Engineering, Research Institute of Agriculture and Life Sciences, Institute of Green Bio Science and Technology, Seoul National University
a석사 서울대학교 농촌시스템공학과 학생
b박사 서울대학교 농촌시스템공학과 학생
c서울대학교 농업생명과학대학 농업생명과학연구소 연구교수
d플로리다 대학교 농업 및 생물 공학 및 열대 연구 및 교육 센터 연구 학자
e서울대학교 농업생명과학연구원 농촌시스템공학과 교수
† Corresponding author Tel.: +82-2-880-4582, Fax: +82-2-873-2087 E-mail: mskang@snu.ac.kr
2021. pp. 61-75
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Abstract

This study aims to assess the changes in crop water requirement of paddy and upland according to future climate and land use changes scenarios. Changes in the spatiotemporal distribution of temperature and precipitation are factors that lower the stability of agricultural water supply, and predicting the changes in crop water requirement in consideration of climate change can prevent the waste of limited water resources. Meanwhile, due to the recent changes in the agricultural product consumption structure, the area of paddy and upland has been changing, and it is necessary to consider future land use changes in establishing an appropriate water use plan. Climate change scenarios were derived from the four GCMs of the CMIP6, and climate data were extracted under two future scenarios, namely SSP1-2.6 and SSP5-8.5. Future land use changes were predicted using the FLUS (Future Land Use Simulation) model. Crop water requirement in paddy was calculated as the sum of evapotranspiration and infiltration based on the water balance in a paddy field, and crop water requirement in upland was estimated as the evapotranspiration value by applying Penman-Monteith method. It was found that the crop water requirement for both paddy and upland increased as w e go to the far future, and the degree of increase and variability by time showed different results for each GCM. The results derived from this study can be used as basic data to develop sustainable water resource management techniques considering future watershed environmental changes.

Keywords
Climate change
land use change
crop water requirement
FLUS model
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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 :6
  • Pages :61-75
  • Received Date : 2021-09-06
  • Revised Date : 2021-10-26
  • Accepted Date : 2021-10-28
  • DOI :https://doi.org/10.5389/KSAE.2021.63.6.061
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