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A web-service tool to generate crop rotation management input files for spatially distributed agroecosystem models




Kipka, Holm, author
David, Olaf, author
Lyon, Jim, author
Garcia, Luis A., author
Green, Timothy R., author
Ascough, James C., II, author
Rojas, Ken, author
Colorado State University, publisher

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For water quality assessment, there are currently models available like the Soil and Water Assessment Tool (SWAT), Agricultural Policy / Environmental eXtender (APEX) and the component-based AgroEcoSystem-Watershed (AgES-W). These models use similar conceptual components to simulate nutrient and chemical transport by water using spatially distributed ecosystem response units (ERUs) and require input data about agricultural management operations for each ERU. The USDA Natural Resources Conservation Service (NRCS) is developing a Land Management and Operation Database (LMOD) which contains input data suitable as potential model input, but LMOD does not provide spatial functionality. A Java-based web-service tool, the Crop Rotation and Management Builder (CRMB), provides the missing spatial information for LMOD by using a spatially enabled data provider, the CropScape web service from the USDA National Agricultural Statistics Service (NASS). The NASS CropScape service offers a remote sensing based raster Crop Data Layer (CDL) for a specific year and a spatial Area of Interest (AOI). The ERUs are represented as a polygon in an ESRI shape file or as a list of point-coordinates (to shape a geometry) text file. CRMB queries the annual main crop information from the NASS CropScape web-service for available CDL years. After reclassifying crop information within each AOI to adjust the final crop area using NASS CropScape provided accuracy values, CRMB selects the crop information by majority area size. CRMB then detects a sequence of main crops for every AOI and year, matches the crop sequence to actual available crop rotation information in LMOD, and links the AOI to an actual crop rotation with all available management operation information. Finally, CRMB generates required management input files for the AgES-W model.


2013 annual AGU hydrology days was held at Colorado State University on March 25 - March 27, 2013.
Includes bibliographical references.

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