ClimateWatershed ConsiderationsFarming OperationsLivestockHuntingFishingFamily RecreationRiparian &WetlandsLakes & ReservoirsGully & Streambank Erosion

Where do the Pollutants Come From ?

AGNPS 2001 Watershed Evaluation Tool GEM

WEATHER

AGNPS 2001Agricultural Research Service A partnering effort between the:and Natural Resource Conservation Service

AGNPS 2001Input/OutputGIS support, TOPAZ, Visual Basic Editor.Climate synthetic weather generator (GEM)AnnAGNPSpollutant loadings (sediment & chemicals).CONCEPTSinstream hydrodynamic processes.SNTEMPstream network water temperature.SIDOsediment intrusion & dissolved oxygen for redds.Fry Emergencemortality of salmonid fry.Salmonid Total Life Stagesspawning-to-return spawners.Salmonid Economicsnet economic value of salmonids in Pacific Northwest.

AnnAGNPSAnnualized Agricultural Non-Point Source Pollution computer model.Continuous simulation, surface runoff pollutant loading (PL) computer model.Replacement for single-event AGNPS 5.0.Written in standard ANSI Fortran 95no memory limits.

AnnAGNPS: operational modes

AnnAGNPS: Uses NRCS Standards Weather Generation - GEM Runoff SCS Curve Number Peak Runoff TR-55 Erosion - RUSLE Sediment Delivery - HUSLE

ProcessesSoils - NASISCrops and Operations Set by NRCS State AgronomistsHUWQ Databases Fertilizer, Pesticides, Animal Wastes, etc. Databases

AnnAGNPS: the pollutant loading modelLoadings by kind of pollutant :Waterrainfall, snowmelt, irrigation, & point sources.Sediment by particle size-class:clay;silt;sand;small aggregate; andlarge aggregate.Chemicals (adsorbates & solutes):nutrientsnitrogen, phosphorous, & organic carbon; andpesticidesany number, any kind.

AnnAGNPS: the pollutant loading model Loadings by source of pollutant: Cells (land areas)water, sediment, & chemicals. Feedlotssoluble nutrients. Gulliessediment and chemicals. Point Sourceswater and chemicals. Reachessediment yield & chemical transport. Impoundmentssediment deposition.

AnnAGNPS: major processesreach 1reach 3reach 4reach 2impoundmentwatershed outletfeedlotgullypoint source

AnnAGNPS: source accountingreach 1Reach 3reach 4reach 2watershed outletfeedlotgullypoint source80% of outlet pest X from cell C10% of outlet sediment from gully25% of outlet nitrogen from feedlotimpoundment

AGNPS 2001 WATERSHED DESCRIPTION

Tucannon River cropland after thunderstorm showing severe erosion

AnnAGNPS: cell processesWeathervaries air temperatures, & relative humidity; allows for variable rainfall between cells.Precipitationrainfall, snowmelt, & irrigation runoff.Soil moistureprecipitation, infiltration, percolation, & evapotranspiration.Management operationscrops, rotation, fertilizer, etc.Irrigationdetermines amount if automatic.Winter routinessnowpack, melt, & frozen ground.Curve numberantecedent moisture condition (current soil moisture).Sediment yieldRUSLE or USLE.

AnnAGNPS: cell processes (continued)Pesticidesapplication & decay; adsorbates & solutes.Nutrients application & decay; adsorbates & solutes.Adds cell data to reach routing processesif runoff event occurs.Adds cell data to simulation totalsif source accounting requested.Writes to a detailed stream network fileif this output is requested.

AnnAGNPS: cell processes (continued) Cells: Foliagerelative growth, nutrients, & pesticides; Soil surfaceresidue, nutrients, & pesticides; Soil profilemoisture, frozen layers, residue, nutrients, & pesticides; and Operationsnext operation & rotation year. Feedlots:Manure pack nutrientssoluble only;Date of new operationcalendar date;Amount left over from previous operationnon-dimensional ratio;Initial manure amountmass; andDaily change in manure production ratemass per unit time.

AnnAGNPS: reach processesWaterrainfall, snowmelt, irrigation, & point sources.Sediment Yieldby particle size-class & source.Chemicalsnutrients, pesticides, & organic carbon.Impoundmentssediment deposition.

USDA-ARS-NSL - CONCEPTS

CONSERVATIONALCHANNELEROSIONPOLLUTANTTRANSPORTSYSTEM

USDA-ARS-NSL - CONCEPTS

Integrates the impact on instream water quality from upland and channel processes to provide a comprehensive stream corridor evaluation tool.

USDA-ARS-NSL - CONCEPTS Impact of Channel IncisionA common and destructive mode of channel erosionBed lowering causes banks to become unstable and widening proceeds at a very rapid paceDestabilizes the landscape and leads to severe downstream impacts

USDA-ARS-NSL - CONCEPTS Characterization of Streambank ErosionBank-toe erosionIntegration of hydraulic, sedimentologic, and geo-technical processes influencing bank failureFrequency of bank failureIncipient motion criteria for removal of failed material

USDA-ARS-NSL - CONCEPTS Effect of riparian vegetation on river restorationFlexible vegetation exert major influences on flow resistance Areas of enhanced deposition and erosion affect channel geometryPlant roots affect stream bank stabilityWoody debris influence flow channel hydraulics and morphology

Upper middle Tucannon River: showing loss of riparian vegetation

Lower end Tucannon River: showing lack of riparian vegetation & stream instability

Integration of Riparian Zones Within AGNPS 2001

Integration of Riparian Zones Within AGNPS 2001

Integration of Riparian Zones Within AGNPS 2001

Integration of Riparian Zones Within AGNPS 2001

Integration of Riparian Zones Within AGNPS 2001

Integration of Riparian Zones Within AGNPS 2001

AGNPS 2001 Web Site What is available at the web site web site instructions; model(s) overviews technical feature abstracts; reference input databases documentation; executable files; sample data sets; profiles of management personnel, sponsors, technical team, & cooperating users; direct link to technical support; and AGNPS version 5.0 (single-event) archives.

AGNPS 2001 Web Site (continued)Distribution via web site go to: http://www.sedlab.olemiss.edu; and then click on: AGNPS 2001 Project; or go directly to: http://www.sedlab.olemiss.edu/AGNPS.html

AGNPS 2001 Registered Users

Federal GovernmentARS EPA NIH NRCSUSCOE WORLDBANKUSGS

UniversitiesClemson Colorado State Iowa State Kansas State Michigan State Oregon State Penn State Virginia State Univ. of Florida Univ. of Georgia Univ. of Kansas Univ. of Massachusetts Univ. of Mississippi Univ. of Montana Univ. of Nebraska Univ. of New Mexico Univ. of North Dakota Univ. of North Texas Univ. of Texas Univ. of Wisconsin All 50 States

AGNPS 2001 Registered Users (cont.)

Foreign Countries (over 40)Argentina Australia Austria Belize Bolivia Brazil Canada Chile China ColumbiaCzechoslovakiaEcuadorEgypt FinlandFrance Germany HungaryIndonesia Italy Japan JordanKorea Lithuania MalaysiaMexicoNew Zealand Netherlands Philippines PolandSingapore Slovia South KoreaSpainSweden Switzerland Syria TaiwanTanzania ThailandTurkey VenezuelaVietnam

AGNPS 2001 Interface Components

What the User sees.Tools to automatically determine model parameters.Tools to modify and add parameters. Tools to visualize the watershed.

AGNPS 2001

Key Parameters: Coordinates of Watershed Outlet, Size of DEMArea shown 4 x 6 milesOutlet Location

Outlet Location

STREAM NETWORK & ASSOCIATED SUBWATERSHEDS

DIGITIZED vs. GENERATED STREAM NETWORKGENERATED STREAM NETWORK ASSOCIATED WITH 47 SUBWATERSHEDSDIGITIZED STREAM NETWORK ASSOCIATED WITH BLUE LINES ON 7.5 MINUTE USGS QUADS

1987 ACCUMULATED RUNOFF by CELL GOODWIN CREEK022.48 in

1987 ACCUMULATED SEDIMENT by CELL GOODWIN CREEK19.94

t/ac

1991 ACCUMULATED SEDIMENT by CELL GOODWIN CREEK147.91

t/ac

FEBRUARY 18, 1991 SEDIMENT by CELLGOODWIN CREEK - 9 inches of Rainfall23.75

t/ac

NOVEMBER 30, 1991 RUNOFF by CELL GOODWIN CREEK - 10.4 inches of Rainfall11.19

in

NOVEMBER 30, 1991 SEDIMENT by CELL GOODWIN CREEK - 10.4 inches of Rainfall48.26

t/acProduces 5.5% of SY @ outlet

REMM Zones