Construction of Database for Application of APEX Model in Korea and Evaluation of Applicability to Highland Field
2017
Koo, J.Y., Kangwon National University, Chuncheon, Republic of Korea | Kim, J., Kangwon National University, Chuncheon, Republic of Korea | Choi, S.K., National Institute of Agricultural Science, Wanju, Republic of Korea | Kim, M.K., National Institute of Agricultural Science, Wanju, Republic of Korea | Jeong, J., Texas A and M University, USA | Lim, K.J., Kangwon National University, Chuncheon, Republic of Korea
The Agricultural Policy/Environmental eXtender (APEX) model was developed to extend EPIC’s capabilities of simulating land management impacts for small-medium watershed and heterogeneous farms. APEX is a flexible and dynamic tool that is capable of simulating a wide array of management practices, cropping systems, and other land uses across a broad range of agricultural landscapes. APEX have its own agricultural environmental database including operation schedule, soil property, and weather data etc., by crops. However, agriculture environmental informations the APEX model has is all based on U.S. As this can cause malfunction or improper simulation while simulating highland field. In this study, database for APEX model to be utilized for South Korea established with 44,814 agriculture fields in Pyeongchang-gun, Korea from 2007 to 2016. And assessed domestic applicability by comparing T-P unit load criteria presented by National Institution of Environmental Research and result of APEX model. As a result of APEX model simulation, average T-P value for decade was 6.18. Average T-P of every year except 2011 was in range of 5.37~10.43 and this is being involved into criteria presented by National Institution of Environmental Research. It is analyzed that adjusting slope factor can make the model applicable for domestic agricultural environment.
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