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January 15, 2003 USDA Conesus Lake Project
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
January 15, 2003 USDA Conesus Lake Project
OverviewOverview
Brief BiographyMapping and Illustration Using GISComputation of P-Index Runoff and Soil Moisture Modeling with SMRHydrologic and Chemical Controls on P Export
previous resultsnew directions
January 15, 2003 USDA Conesus Lake Project
OverviewOverview
Brief BiographyMapping and Illustration Using GISComputation of P-Index Runoff and Soil Moisture Modeling with SMRHydrologic and Chemical Controls on P Export
previous resultsnew directions
January 15, 2003 USDA Conesus Lake Project
Brief BiographyBrief Biography1994: Ph.D. (Cornell University) – “Effective Use
of GIS in Rainfall-Runoff Modeling”1993-96: USDA – ARS - Pasture Systems and
Watershed Management Research Lab – “Optimizing Nutrient Management to Sustain Agricultural Ecosystems and Protect Water Quality”
1996-present: SUNY-Brockport – GIS and Water Resources (wetlands, flood forecasting)
January 15, 2003 USDA Conesus Lake Project
USDA-ARS
Use of GIS in Agricultural
Nonpoint Source Pollution Control
January 15, 2003 USDA Conesus Lake Project
OverviewOverview
Brief BiographyMapping and Illustration Using GISComputation of P-Index Runoff and Soil Moisture Modeling with SMRHydrologic and Chemical Controls on P Export
previous resultsnew directions
January 15, 2003 USDA Conesus Lake Project
Mapping / Illustration Using GIS
Mapping / Illustration Using GIS
Reports and PresentationsPublic information
www.blackcreekwatershed.orgData ExplorationsVisualization
discoveryinsight
January 15, 2003 USDA Conesus Lake Project
Mapping / Illustration Using GIS
Mapping / Illustration Using GIS
January 15, 2003 USDA Conesus Lake Project
OverviewOverview
Brief BiographyMapping and Illustration Using GISComputation of P-Index Runoff and Soil Moisture Modeling with SMRHydrologic and Chemical Controls on P Export
previous resultsnew directions
January 15, 2003 USDA Conesus Lake Project
Computation of P-Index
Computation of P-IndexPreservation of spatial
variabilityComputational efficiencyVisualization of resultsFacilitates improved
understanding of physical interactions
January 15, 2003 USDA Conesus Lake Project
OverviewOverview
Brief BiographyMapping and Illustration Using GISComputation of P-Index Runoff and Soil Moisture Modeling with SMRHydrologic and Chemical Controls on P Export
previous resultsnew directions
January 15, 2003 USDA Conesus Lake Project
Runoff and Soil Moisture Modeling with SMR
Runoff and Soil Moisture Modeling with SMR
Variable Source Area Hydrology
Critical Source Areas for Nonpoint Source Pollution
January 15, 2003 USDA Conesus Lake Project
Runoff and Soil Moisture Modeling with SMR
Runoff and Soil Moisture Modeling with SMR
SMR – The Soil Moisture Routing Model
Product of Zollweg’s ThesisGIS is the Ideal
Environmental Modeling Platform
Spatially-distributed, Physically-based
January 15, 2003 USDA Conesus Lake Project
Runoff and Soil Moisture Modeling with SMR
Runoff and Soil Moisture Modeling with SMR
Coded and Running in Lennon Hall Using Visual BASIC within ArcGIS 8.2
Complete Control of Code
Easy 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 | ' ---------------------------------------------------------------
January 15, 2003 USDA Conesus Lake Project
OverviewOverview
Brief BiographyMapping and Illustration Using GISComputation of P-Index Runoff and Soil Moisture Modeling with SMRHydrologic and Chemical Controls on P Export
previous resultsnew directions
January 15, 2003 USDA Conesus Lake Project
USDA-ARS
Pasture Systems and Watershed Management Pasture Systems and Watershed Management Research LaboratoryResearch Laboratory
USDAUSDA--ARSARSUniversity Park, PAUniversity Park, PA
J.A. ZollwegW.J. GburekH.B. Pionke
A.N. Sharpley
GIS-Based Delineation of Source Areas of Phosphorus within Northeastern
Agricultural Watersheds
(1996)
January 15, 2003 USDA Conesus Lake Project
Brown Watershed – Tributary of WD38, Klingerstown, PA
January 15, 2003 USDA Conesus Lake Project
USDA-ARS
R u n o ff, m m
B ray P , k g /h a /cm d ep th
S o l P lo ss, m g
Model Results4/25/92
D
January 15, 2003 USDA Conesus Lake Project
USDA-ARS
S o l P lo ss, m g
P Loss
D P
January 15, 2003 USDA Conesus Lake Project
OverviewOverview
Brief BiographyMapping and Illustration Using GISComputation of P-Index Runoff and Soil Moisture Modeling with SMRHydrologic and Chemical Controls on P Export
previous resultsnew directions
January 15, 2003 USDA Conesus Lake Project
More Concepts to TryMore Concepts to Try
Chemical dynamics of P Export Transport processesErosion modeling and sediment transportPathogen transport
January 15, 2003 USDA Conesus Lake Project
GoalsGoals
Support “mechanics” of project
Better understanding of watershed P dynamics
Continue my work and achieve mutual benefit!