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ARS Home » Midwest Area » West Lafayette, Indiana » National Soil Erosion Research Laboratory » Research » Publications at this Location » Publication #337471

Title: Online interface for the Agricultural Policy Environmental eXtender (APEX) model

item FENG, QINGYU - Purdue University
item ENGEL, BERNARD - Purdue University
item Huang, Chi Hua
item Flanagan, Dennis

Submitted to: ASABE Annual International Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 2/20/2017
Publication Date: 7/16/2017
Citation: Feng, Q., Engel, B.A., Huang, C., Flanagan, D.C. 2017. Online interface for the Agricultural Policy Environmental eXtender (APEX) model. ASABE Annual International Meeting. CD.

Interpretive Summary:

Technical Abstract: The Agricultural Policy Environmental eXtender (APEX) model has been intensively used in the Conservation Effects Assessment Projects (CEAP) and many other projects for evaluating the benefits of land use change and best management practices (BMPs) on hydrologic and nonpoint source related processes. In this study, a user-friendly online interface was developed for the model. This interface was designed to provide users an easy way to run the APEX model at the field scale (single field). The interface incorporated publicly available datasets for soil and climate information across the continental United States. Soil properties required by the APEX model were extracted from the Soil Survey Geographic Database (SSURGO), and soil entries were grouped by zip code. For climate data, users have the option to run with observed data (2700 sites across the US from National Climate Data Center), generated data (CLIGEN), and future climate data. Users are able to determine the location, specify soil, area, slope, and management (including tile drainage) of their field. They can also try various BMPs, such as grassed water ways, no till, etc., on their land. The result of the APEX simulation provides average annual values for runoff, tile flow, sediment, nitrogen, and phosphorus loss. This interface provides conservationists, farmers, and other stake holders a handy tool to predict nutrient losses at the field scale.