About

The Annualized AGricultural Non-Point Source (AnnAGNPS) watershed pollution model was developed to simulate quantities of non-point source pollutants within agricultural watersheds. The AnnAGNPS model is a watershed-scale model that operates on continuous daily time scale simulation to predict water, sediment, nutrient, and chemical loadings. The model was originally designed for use on gauged and ungauged mixed land-use agricultural watersheds with the capabilities to estimate soil erosion, yield, and loads from sheet & rill, ephemeral gully, classical gully, and channel erosional processes, as well as assess the impact of irrigation, riparian buffers, and wetlands on pollutant loads. The model can separate loadings by source throughout the watershed, sub-catchments (fields), feedlots, ephemeral gullies, point sources, reaches, and impoundments.

Relevant characteristics of the AnnAGNPS model include:

• Detailed tracking of sediment/nutrient/pesticide sources and sinks associated with clay, silt, sand, and small and large aggregate particle sizes throughout the watershed.
• Sources include sheet & rill, ephemeral gully, classical gully, channel erosional processes and sinks include sediment retention ponds, wetlands, and edge-of-field vegetative filter strips.
• Components to describe farm management schedules and their respective operations for all field to basin scales at a daily time-step.
• Components and tools to characterize sources and the effect of conservation practices on pollutant loads at field scales while tracking their movement within and throughout larger watersheds or basins .

Project Team Members

Middle Tennessee State University Department of Geosciences	USDA – ARS National Sedimentation Laboratory
Henrique Momm (Professor & PI) Racha El Kadiri (Associate Professor & Co-PI) Thomas Seever (support scientist) Katy Moore-Freeman (support scientist)	Ron Bingner (Agricultural Engineer & PI) Robert Wells (Research Hydraulic Engineer)

Contact

For information and support please contact henrique.momm@mtsu.edu.