Agricultural Integrated Management System

Agricultural Integrated Management System (AIMS) 2.0 Beta

Developed by NCCHE and USDA-ARS, AIMS is a web-based decision support tool for running watershed and channel models with automated input data preparation. AIMS serves as an environment for evaluating the impacts of agricultural and channel conservation management practices for any watershed in the United States. AIMS v2.0 beta currently hosts the TopAGNPS, the topographic analysis tool of USDA-ARS. AIMS also provides a seamless map server which allows users to view geospatial data layers including USGS Hydraulic Unit Code (HUC) boundaries and medium resolution National Hydrography Dataset (NHDPlus) stream network. The integrations of Annualized Agricultural Non-Point Source (AnnAGNPS) of USDA-ARS for watershed simulation and CCHE1D channel network simulation solution of University of Mississippi for water routing are currently ongoing.

Models:
TOPAGNPS is a topographic analysis tool that provides comprehensive processing and evaluation of the digital elevation model (DEM) using the D8 method, the downslope flow routing concept, and the critical source area (CSA) concept. TOPAGNPS is used to identify and measure topographic features, define surface drainage, subdivide watersheds along drainage divides, quantify the drainage network, and calculate representative sub-catchment parameters. It also includes modules to define wetland/ponds, buffers, and potential ephemeral gullies. AIMS serves TOPAGNPS generated delineation maps for the entire United States at approximately 30 m resolution. Users can generate view the stream network and AnnAGNPS cells for any watershed of HUC12 size or larger on the AIMS web interface. With a single user-identified outlet point on the web interface, AIMS instantaneously displays the watershed for to the user-provided outlet.

Data Sources:
3D Elevation Program (3DEP)
3DEP is a coordinated effort by USGS National Geospatial Program aiming to provide high quality topographic data all over the country. At the end of fiscal year 2021, “84% of the Nation has available or in progress elevation data that meet 3DEP specifications for high accuracy and resolution.
Accessible at: https://www.usgs.gov/3d-elevation-program

Watershed Boundary Dataset (WBD)
The WBD is a seamless set of hydrologic units that represent the area of the landscape draining to a portion of the stream network. The largest units are the 2-Digit Hydrologic units, containing 4-Digit units, down to 12-Digit hydrologic units referred to as HUC12s. Each unit may represent all or part of the total drainage area to an outlet point. WBD are determined based on topographic, hydrologic, and other relevant landscape characteristics. The WBD seamlessly represents hydrologic units at six required and two optional hierarchical levels.
Accessible at: https://www.usgs.gov/national-hydrography/watershed-boundary-dataset

Soil Survey Geographic Database (SSURGO/gSSURGO)
SSURGO is digital soil data produced and distributed by Natural Resources Conservation Service (NRCS). The dataset consists of geo-referenced digital map data and computerized attribute data. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the component soils' proportionate extent and properties.

Direct download: https://nrcs.app.box.com/v/soils/folder/17971946225
Web Soil Survey (WSS) https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx
Soil Data Access Web Service https://sdmdataaccess.nrcs.usda.gov/WebServiceHelp.aspx
The shapefile containing the soil MUKEY can also be downloaded from the gSSURGO version of the dataset: https://www.nrcs.usda.gov/resources/data-and-reports/gridded-soil-survey-geographic-gssurgo-database

Gridded National Soil Survey Geographic Database (gNATSGO)
The gridded National Soil Survey Geographic Database (gNATSGO) is a USDA-NRCS Soil & Plant Science Division (SPSD) composite database that provides complete coverage of the best available soils information for all areas of the United States and Island Territories. gNATSGO provides composite data from STATSGO2, SSURGO, and Raster Soil Survey.
Accessible at: https://www.nrcs.usda.gov/resources/data-and-reports/gridded-national-soil-survey-geographic-database-gnatsgo

Acknowledgements
This work is supported by the U.S. Department of Agriculture, Agricultural Research Service, through the Cooperative Agreement No. 6060-13000-030-00D between the USDA-ARS National Sedimentation Laboratory (USDA-ARS-NSL) and the University of Mississippi / National Center for Computational Hydroscience and Engineering (NCCHE). Project team members: