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A framework for automated and spatially-distributed modeling with the Agricultural Policy Environmental eXtender (APEX) model
Environmental Modelling & Software  (IF5.288),  Pub Date : 2021-07-19, DOI: 10.1016/j.envsoft.2021.105147
Feng Pan, Qingyu Feng, Ryan McGehee, Bernard A. Engel, Dennis C. Flanagan, Jingqiu Chen

Agricultural Best Management Practices (BMPs) are popular approaches to reduce nonpoint source (NPS) pollutant losses. Hydrologic models that can simulate impacts of BMPs at the field-scale can help guide the selection of BMPs. Furthermore, high-performance computing techniques have significant potential for scaling spatial simulations and reducing model runtimes. In this study, a parallel modeling framework for the Agricultural Policy Environmental eXtender (APEX) model was developed for large-scale, high-resolution, spatially-distributed model simulations. It provides a tool for conducting BMP evaluations at field-scale with a distributed architecture and automatic model setup of APEX. Sample results demonstrated the capability of the framework for distributed and semi-distributed modeling and illustrated the performance of parallelization. This framework can help provide guidance for decision makers on agricultural BMPs with large-scale water quality assessments and NPS nutrient loading reductions.