Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Assessment of the Impacts of Rice Self-sufficiency on National Rresources in Korea through Water-Energy-Food-Land Nexus Approach

물-에너지-식량-토지 넥서스를 통한 미래 쌀 수급 변화에 따른 자원별 이용량 변화 분석

  • Lee, Sang-Hyun (Department of Biological and Agricultural Engineering, Texas A&M University) ;
  • Choi, Jin-Yong (Department of Rural Systems Engineering, and Research Institute for Agriculture & Life Sciences, Seoul National University) ;
  • Yoo, Seung-Hwan (Department of Rural and Bio-Systems Engineering, Chonnam National University) ;
  • Hur, Seung-Oh (Climate Change & Agroecology Division, National Institute of Agricultural Sciences, Rural Development Administration)
  • Received : 2017.12.28
  • Accepted : 2018.06.26
  • Published : 2018.07.31
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Abstract

The aim of this study is to apply the Water-Energy-Food-Land Nexus approach which can analyze the trade-offs among resources, and assess the holistic impacts of food security. First, we applied rice as a study crop and analyzed the trend of consumption of rice and the area of paddy fields. Second, the portfolios of water, energy, and land for rice production were constructed using data of footprints and productivity. Finally, the self-sufficiency ratio (SSR) of rice in target year was set as food security scenario and assessed the impacts of food security on water, energy, and land availability. In 2030, the SSR of rice decreased to 87 %, and water use for producing rice decreased from 4,728 to $3,350million\;m^3$, and the water availability index increased from 0.33 to 0.53. However, food security is essential issue and we set the 50 % and 100 % SSR of rice as high and low food security scenarios. For 100% SSR in 2030, about $3,508million\;m^3$ water was required and water availability index reached to 0.5. In other words, there is the trade-off between food security and water-energy-lands availability. Therefore, it is difficult to make a decision whether a high level of SSR is better or worse. However, this study showed the both positive and negative impacts by change of food security and it can be useful for setting the policy decision considering both food security and sustainable resource management at the same time.

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