GIS Modeling of Source Areas of Nonpoint Source Pollution

GIS Modeling of Source Areas of Nonpoint Source PollutionJames Zollweg, Ph.D.SUNY-Brockport Earth SciencesWater Resources ProgramGeographic Information Systems Program

OverviewBrief BiographyMapping and Illustration Using GISComputation of P-Index Runoff and Soil Moisture Modeling with SMRHydrologic and Chemical Controls on P Exportprevious resultsnew directions

Brief Biography1994: Ph.D. (Cornell University) Effective Use of GIS in Rainfall-Runoff Modeling1993-96: USDA ARS - Pasture Systems and Watershed Management Research Lab Optimizing Nutrient Management to Sustain Agricultural Ecosystems and Protect Water Quality1996-present: SUNY-Brockport GIS and Water Resources (wetlands, flood forecasting)

USDA-ARS

Use of GIS in Agricultural Nonpoint Source Pollution Control

Mapping / Illustration Using GISReports and PresentationsPublic informationwww.blackcreekwatershed.orgData ExplorationsVisualizationdiscoveryinsight

Mapping / Illustration Using GIS

Computation of P-IndexPreservation of spatial variabilityComputational efficiencyVisualization of resultsFacilitates improved understanding of physical interactions

Runoff and Soil Moisture Modeling with SMRVariable Source Area HydrologyCritical Source Areas for Nonpoint Source Pollution

Runoff and Soil Moisture Modeling with SMRSMR The Soil Moisture Routing ModelProduct of Zollwegs ThesisGIS is the Ideal Environmental Modeling PlatformSpatially-distributed, Physically-based

Runoff and Soil Moisture Modeling with SMRCoded and Running in Lennon Hall Using Visual BASIC within ArcGIS 8.2Complete Control of CodeEasy to Integrate Additional Environmental Modeling Concepts

Private Function HM_NeighborFlow(sStorage As String, _ pInterflowRaster As IRaster, ierr As Integer) As Boolean '----------------------------------------------------------------------------- ' The storage is adjusted for the amount leaving, the interflow and the amount ' entering from neighbor cells. The maps north, northeast, east, southeast, ' south, southwest, west and northwest represent the fraction of flow heading ' in 'that' direction from the current cell. Therefore to find the amount ' entering the current cell one needs to look at the neighbor cells and the ' corresponding maps which point to the current cell. For example, if the ' current cell is (i,j) and one looks to the north (i-1,j) one would use the ' south map to get the fraction of flow since the current cell is south of its ' north neighbor. ' --------------------------------------------------------------- ' | cell: (i-1, j-1) | cell: (i-1, j) | cell: (i-1, j+1) | ' | map: southeast | map: south | map: southwest | ' --------------------------------------------------------------- ' | cell: (i-1, j) | cell: (i, j) | cell: (i+1, j+1) | ' | map: east | map: none | map: west | ' --------------------------------------------------------------- ' | cell: (i+1, j-1) | cell: (i+1, j) | cell: (i+1, j+1) | ' | map: northeast | map: north | map: northwest | ' ---------------------------------------------------------------

(1996)

USDA-ARS

Pasture Systems and Watershed Management Research LaboratoryUSDA-ARSUniversity Park, PA

J.A. ZollwegW.J. GburekH.B. PionkeA.N. Sharpley

GIS-Based Delineation of Source Areas of Phosphorus within Northeastern Agricultural Watersheds

Brown Watershed Tributary of WD38, Klingerstown, PA

USDA-ARS

Model Results4/25/92

D

USDA-ARS

P Loss

D P

More Concepts to TryChemical dynamics of P Export Transport processesErosion modeling and sediment transportPathogen transport

GoalsSupport mechanics of projectBetter understanding of watershed P dynamicsContinue my work and achieve mutual benefit!

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GIS Modeling of Source Areas of Nonpoint Source Pollution