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Modeling Support for Attoyac Bayou Watershed– SELECT

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Presentation on theme: "Modeling Support for Attoyac Bayou Watershed– SELECT"— Presentation transcript:

1 Modeling Support for Attoyac Bayou Watershed– SELECT
(06/16/2011) Jasjeet Kaur Kyna McKee R. Karthikeyan Biological and Agricultural Engineering Lucas Gregory Texas Water Resources Institute Copyright© Biological and Agricultural Engineering Department, Texas A&M University

2 SELECT Spatially Explicit Load Enrichment Calculation Tool
An automated GIS tool to assess bacteria loads using spatial factors Land Use Human and Animal Population Densities Slope of Landscape Soil Types Distance from the Creek Identifies nonpoint sources most likely contributing to E. coli contamination in each “sub-watershed” Helps stakeholders target areas of greatest concern where management solutions should be focused Source: Copyright© Biological and Agricultural Engineering Department, Texas A&M University 2

3 SELECT Land use/ land cover data updated Watersheds delineated
Data layers used in SELECT Land use Hydrography (stream network) Urban areas Watershed boundary County boundary Soils Wastewater treatment facilities Census Population density Grazing Cattle Feral Hogs Wildlife Poultry OSSFs Copyright© Biological and Agricultural Engineering Department, Texas A&M University 3

4 SELECT Model Input Data
Census Blocks (U.S. Census Bureau) Soils (USDA NRCS) Digital Elevation Map (BASINS) Urban Areas (TCEQ) Sub-watersheds & stream network Livestock Stakeholder input Agricultural Statistics (USDA) and Stocking Rates Poultry Operations (TSSWCB) Wildlife Wildlife experts input, Resource Management Unit data for Deer (TPWD) Copyright© Biological and Agricultural Engineering Department, Texas A&M University 4

5 Example SELECT Inputs/Outputs
The following results and stocking rates are from another watershed where SELECT modeling was conducted Modeling Support for Little Brazos River Tributaries Bacteria Assessment (TSSWCB Project #08-55) Copyright© Biological and Agricultural Engineering Department, Texas A&M University

6 Example SELECT Inputs Grazing Cattle
Density: acres per animal (recommended stocking rate) Estimated Population: Land Use Managed Pasture Rangeland Mixed Forest? Deer Density: acres per animal (TPWD estimates) Land Use Rangeland Managed Pasture Mixed Forest Riparian Forest Pine Plantation Copyright© Biological and Agricultural Engineering Department, Texas A&M University

7 Example SELECT Inputs Septic Feral Hogs
Density: acres per animal Land Use Rangeland Managed Pasture Mixed Forest Riparian Forest Barren Land 100 m buffer around streams Septic Gallons of effluent per day per person 106CFU/100 mL bacteria in raw sewage Rural Population (by county, from census) Other Inputs and Parameters Needed Poultry Pets (dogs) Urban areas Copyright© Biological and Agricultural Engineering Department, Texas A&M University

8 Walnut Creek - Potential E. coli loads
Copyright© Biological and Agricultural Engineering Department, Texas A&M University

9 Walnut Creek-Total Potential Daily E. coli loads
Copyright© Biological and Agricultural Engineering Department, Texas A&M University

10 Thanks! karthi@tamu.edu
Copyright© Biological and Agricultural Engineering Department, Texas A&M University

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