January 15, 2003USDA Conesus Lake Project GIS Modeling of Source Areas of Nonpoint Source Pollution  James Zollweg, Ph.D.  SUNY-Brockport Earth Sciences  Water Resources Program  Geographic Information Systems Program

January 15, 2003USDA Conesus Lake Project Overview  Brief Biography  Mapping and Illustration Using GIS  Computation of P-Index  Runoff and Soil Moisture Modeling with SMR  Hydrologic and Chemical Controls on P Export  previous results  new directions

January 15, 2003USDA Conesus Lake Project Overview  Brief Biography  Mapping and Illustration Using GIS  Computation of P-Index  Runoff and Soil Moisture Modeling with SMR  Hydrologic and Chemical Controls on P Export  previous results  new directions

January 15, 2003USDA Conesus Lake Project Brief Biography  1994: Ph.D. (Cornell University) – “Effective Use of GIS in Rainfall-Runoff Modeling”  : 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, 2003USDA Conesus Lake Project

January 15, 2003USDA Conesus Lake Project Overview  Brief Biography  Mapping and Illustration Using GIS  Computation of P-Index  Runoff and Soil Moisture Modeling with SMR  Hydrologic and Chemical Controls on P Export  previous results  new directions

January 15, 2003USDA Conesus Lake Project Mapping / Illustration Using GIS  Reports and Presentations  Public information   Data Explorations  Visualization  discovery  insight

January 15, 2003USDA Conesus Lake Project Mapping / Illustration Using GIS

January 15, 2003USDA Conesus Lake Project Overview  Brief Biography  Mapping and Illustration Using GIS  Computation of P-Index  Runoff and Soil Moisture Modeling with SMR  Hydrologic and Chemical Controls on P Export  previous results  new directions

January 15, 2003USDA Conesus Lake Project Computation of P-Index  Preservation of spatial variability  Computational efficiency  Visualization of results  Facilitates improved understanding of physical interactions

January 15, 2003USDA Conesus Lake Project Overview  Brief Biography  Mapping and Illustration Using GIS  Computation of P-Index  Runoff and Soil Moisture Modeling with SMR  Hydrologic and Chemical Controls on P Export  previous results  new directions

January 15, 2003USDA Conesus Lake Project Runoff and Soil Moisture Modeling with SMR  Variable Source Area Hydrology  Critical Source Areas for Nonpoint Source Pollution

January 15, 2003USDA Conesus Lake Project Runoff and Soil Moisture Modeling with SMR  SMR – The Soil Moisture Routing Model  Product of Zollweg’s Thesis  GIS is the Ideal Environmental Modeling Platform  Spatially-distributed, Physically-based

January 15, 2003USDA Conesus Lake Project 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, 2003USDA Conesus Lake Project Overview  Brief Biography  Mapping and Illustration Using GIS  Computation of P-Index  Runoff and Soil Moisture Modeling with SMR  Hydrologic and Chemical Controls on P Export  previous results  new directions

January 15, 2003USDA Conesus Lake Project (1996)

January 15, 2003USDA Conesus Lake Project Brown Watershed – Tributary of WD38, Klingerstown, PA

January 15, 2003USDA Conesus Lake Project

January 15, 2003USDA Conesus Lake Project

January 15, 2003USDA Conesus Lake Project Overview  Brief Biography  Mapping and Illustration Using GIS  Computation of P-Index  Runoff and Soil Moisture Modeling with SMR  Hydrologic and Chemical Controls on P Export  previous results  new directions

January 15, 2003USDA Conesus Lake Project More Concepts to Try  Chemical dynamics of P Export  Transport processes  Erosion modeling and sediment transport  Pathogen transport

January 15, 2003USDA Conesus Lake Project Goals  Support “mechanics” of project  Better understanding of watershed P dynamics  Continue my work and achieve mutual benefit!