Development of Novel QAPEX Analysis System Using Open-Source GIS

Jayoung Koo, Jonggun Kim, Jicheol Ryu, Dong-Suk Shin, Seoro Lee, Min-Kyeong Kim, Jaehak Jeong and Kyoung-Jae Lim
Additional contact information
Jayoung Koo: Watershed and Total Load Management Research Division, National Institute of Environmental Research, Incheon 22689, Korea
Jonggun Kim: Department of Regional Infrastructure Engineering, Kangwon National University, Chuncheon 24341, Korea
Jicheol Ryu: Research Strategy and Planning Division, National Institute of Environmental Research, Incheon 22689, Korea
Dong-Suk Shin: Watershed and Total Load Management Research Division, National Institute of Environmental Research, Incheon 22689, Korea
Seoro Lee: Department of Regional Infrastructure Engineering, Kangwon National University, Chuncheon 24341, Korea
Min-Kyeong Kim: Department of Agricultural Environment, National Institute of Agricultural Sciences, Wanju 55365, Korea
Jaehak Jeong: Blackland Extension and Research Center, Texas A&M AgriLife, College Station, TX 77843, USA
Kyoung-Jae Lim: Department of Regional Infrastructure Engineering, Kangwon National University, Chuncheon 24341, Korea

Sustainability, 2022, vol. 14, issue 13, 1-15

Abstract: The Agricultural Policy/Environmental eXtender (APEX) model has been used for farm/small watershed management, and the ArcAPEX interface was developed using the ArcGIS extension. However, the interface requires a paid license and limits dynamic applications that reflect various agricultural farming practices. In this study, a novel APEX model interface using Quantum GIS, the QAPEX analysis system, was developed by incorporating open-source-based GIS software for the simulation of water quality impacts of various best management practices reflecting local farming activities. The watershed delineation process running on the QAPEX interface is more flexible than that on the ArcAPEX interface, which renders simulations on hydrology and water quality with considerable precision. The newly developed system can be used to visually interpret simulation results (e.g., flow and load duration curve functions). Therefore, the open-source-based model can be used to derive data for sustainable agricultural policies, with a focus on the field-level application of management practices.

Keywords: APEX; open-source software; QGIS; QAPEX; best management practice; LDC (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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