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Lake Eutrophication Change Detection for the Management of Water Resources

Lake Eutrophication Change Detection for the Management of Water Resources. Michelle L. Aten and Greg Easson University of Mississippi Geoinformatics Center Multi-Temp 2005. Partners. NASA World Summit for Sustainable Development Objectives Module 3 – Disaster Management and Conflicts

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Lake Eutrophication Change Detection for the Management of Water Resources

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  1. Lake Eutrophication Change Detection for the Management of Water Resources Michelle L. Aten and Greg Easson University of Mississippi Geoinformatics Center Multi-Temp 2005

  2. Partners • NASA • World Summit for Sustainable Development • Objectives Module 3 – Disaster Management and Conflicts • Natural and Human Induced Disasters • Water Resources • European Space Agency • TIGER initiative • South African Division of Water Affairs and Forestry • National Eutrophication Monitoring Programme

  3. Overview • Eutrophication • Tropic level of lake increases • Nutrient enrichment, especially phosphorus • Available oxygen decreases • May become toxic • Unsuitable for consumption • May lead to growth of aquatic macrophytes

  4. Overview • Anthropogenic Causes • Agricultural practices • Industrial activity • Residential development • Effects on Society • Requires filtering of water supply • May result in water supply interruption • Impacts recreational uses of reservoir

  5. Benefits • System for advanced warning of eutrophication • Decision support for policy makers • Alternatives for nations without water resource monitoring infrastructures

  6. Deliverables • Comprehensive watershed characterization • Web enabled GIS data portal • Educational materials • Operational solution for resource monitoring • Joint publications and presentations

  7. Study Site • Hartbeespoort Lake, South Africa • 20 sq km • 50 km N Johannesburg • 35 km W Pretoria

  8. Earth Observation Data ASTER MODIS Landsat 5 TM Landsat 7 ETM+ SRTM ASAR MERIS Field Data Surface Sample: Chlorophyll a Integrated 0-5m Sample: Chlorophyll a Field verification GIS Data Soils DEM Classification Data

  9. Watershed Models • USDA – National Sedimentation Lab • AnnAGNPS – Annualized Agricultural Non-Point Source • NOAA • N-SPECT – Non-Point Source Pollution and Erosion Comparison Tool

  10. Selection Criteria • International scope • Requires inputs from available data • Reliability • Ease of Use • Iterative analysis tools • Cost effective • Validation options

  11. Basin Characterization • Input Data • DEM • Soils Maps • In-situ Data • Land Use/Land Cover Maps • Output Data • Hydrology • Nutrients

  12. Land Use / Land Cover

  13. ASTER: April 18, 2004

  14. Chlorophyll a: Surface

  15. Chlorophyll a: 0-5m

  16. Acknowledgements • Division of Water Affairs and Forestry, National Eutrophication Monitoring Programme • NASA, Stennis Space Center • European Space Agency

  17. The University of Mississippi Geoinformatics Center www.umgc.olemiss.edu aten@olemiss.edu

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