APEX – Agricultural Policy/Environmental eXtender Model

Agricultural Policy/Environmental eXtender (APEX) has components for routing water, sediment, nutrients, and pesticides across complex landscapes and channel systems to the watershed outlet as well as groundwater and reservoir components. A watershed can be subdivided as much as necessary to assure that each subarea is relatively homogeneous in terms of soil, land use, management, and weather. APEX was constructed to evaluate various land management strategies considering sustainability, erosion (wind, sheet, and channel), economics, water supply and quality, soil quality, plant competition, weather, and pests. The routing of water, sediment, nutrient, and pesticide capabilities are some of the most comprehensive available in current landscape-scale models and can be simulated between subareas and channel systems within the model. APEX can perform long-term continuous simulations for modeling the impacts of different nutrient management practices, tillage operations, conservation practices, alternative cropping systems, and other management practices on surface runoff and losses of sediment, nutrients, and other pollutant indicators.

Data and Resources

Field Value
accessLevel public
bureauCode {005:18}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
datagov_dedupe_retained 20220519114457
identifier 26ba7e27-544f-4705-ad23-ac7c0db74ca9
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2021-10-05
programCode {005:040}
publisher Agricultural Research Service
resource-type Dataset
source_datajson_identifier true
source_hash 2de371d4d8fcf05f526d9019f0964fd5f2c2e7a5
source_schema_version 1.1
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • agricultural-policy-environmental-extender
  • amerigeo
  • amerigeoss
  • apex
  • ckan
  • geo
  • geoss
  • national
  • north-america
  • np211
  • np212
  • np215
  • united-states
isopen True
license_id cc-zero
license_title Creative Commons CCZero
license_url http://www.opendefinition.org/licenses/cc-zero
maintainer Blackland Research and Extension Center
maintainer_email epicapex@brc.tamus.edu
metadata_created 2025-11-20T03:02:18.005440
metadata_modified 2025-11-20T03:02:18.005444
notes <p>Agricultural Policy/Environmental eXtender (APEX) has components for routing water, sediment, nutrients, and pesticides across complex landscapes and channel systems to the watershed outlet as well as groundwater and reservoir components. A watershed can be subdivided as much as necessary to assure that each subarea is relatively homogeneous in terms of soil, land use, management, and weather. APEX was constructed to evaluate various land management strategies considering sustainability, erosion (wind, sheet, and channel), economics, water supply and quality, soil quality, plant competition, weather, and pests. The routing of water, sediment, nutrient, and pesticide capabilities are some of the most comprehensive available in current landscape-scale models and can be simulated between subareas and channel systems within the model. APEX can perform long-term continuous simulations for modeling the impacts of different nutrient management practices, tillage operations, conservation practices, alternative cropping systems, and other management practices on surface runoff and losses of sediment, nutrients, and other pollutant indicators.</p>
num_resources 1
num_tags 13
title APEX – Agricultural Policy/Environmental eXtender Model