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!