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Surface Water Simulation Group

Surface Water Simulation Group. Comprehensive watershed scale model developed and supported by the USDA-ARS capable of simulating surface and groundwater hydrology under different management practices in hydrologically complex watersheds. Applications. US-EPA BASINS

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Surface Water Simulation Group

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  1. Surface Water Simulation Group

  2. Comprehensive watershed scale model developed and supported by the USDA-ARS capable of simulating surface and groundwater hydrology under different management practices in hydrologically complex watersheds.

  3. Applications US-EPA BASINS  Multipurpose Environmental Analysis System for Performing Watershed and Water Quality Studies  System for Supporting Development of Total Maximum Daily Loads (TMDL’s).  SWAT Included in Basins 3.0

  4. Applications • Assessment of CAFOs on Water Quality • Hydrologic and Water Quality Impacts resulting from Land Use Change within Watersheds • Assessing Impact of Climate Change

  5. Upland Processes SWAT Watershed System Channel/Flood Plain Processes

  6. Possible Configurations  Cells  Subwatersheds  Hydrologic Response Units • Output from other Models - EPIC, SWAT  Point Sources - Treatment Plants

  7. SWAT Strengths Upland Processes • Comprehensive Hydrologic Balance Physically-Based Inputs Plant Growth – Rotations, Crop Yields Nutrient Cycling in Soil Land Management - BMP Tillage, Irrigation, Fertilizer, Pesticides, Grazing, Rotations, Subsurface Drainage, Urban-Lawn Chemicals, Street Sweeping

  8. General Description Continuous Time Daily Time Step (Sub-hourly) One Day to Hundreds of Years  Readily available input – Physically based  Distributed Parameter Unlimited Number of Subwatersheds  Comprehensive – Process Interactions •  Simulate Management

  9. Hydrologic Balance Evaporation and Transpiration Precipitation Surface Runoff Root Zone Infiltration/plant uptake/ Soil moisture redistribution Lateral Flow Unsaturated Zone Revap from shallow aquifer Percolation to shallow aquifer Shallow Aquifer Return Flow Confining Layer Flow out of watershed Deep Aquifer Recharge to deep aquifer

  10. Surface Water Modeling GroupProject Objectives • Develop a methodology to simulate the surface water hydrology and percolation below the rooting zone of multiple combinations of land, soils, management practices, and climatic conditions across Michigan in support of the IWBA DSS. • Provide a database of spatially explicit recharge values

  11. Recharge Value for Climate Zone 1 % Frequency Recharge (mm/yr) Multidimensional Recharge Array Soil Type Management Practice Land Cover Type

  12. Tasks • Watershed Hydrology Validation • Augusta Creek • Selection of Pertinent Land Covers / Management Practices • Model Sensitivity • Soil Type • Management Practices • Climate • Development of Recharge Value Database • PDF Development

  13. Watershed ValidationAugusta Creek • Small watershed near KBS • 38.9 mi2 • Available data for surface water, groundwater, and ecological modeling teams • Watershed will be used to validate modeling approaches

  14. Data Requirements and Sources • STATSGO Soils database • 30m MDNR land cover data (2001) • 30m USGS digital elevation model • Climatic data (KBS – NWS station) • Observed surface water data (1980 – 2000) • USGS gaging station on Augusta Creek

  15. Augusta Creek Landuse and Soil Distribution Area [ha] Area [acres]%Wat.Area WATERSHED: 9662.0400 23875.3839 LANDUSE: Pasture-->PAST 3060.1836 7561.8668 31.67 Range-Grasses-->RNGE 650.0890 1606.4024 6.73 Water-->WATR 90.5050 223.6423 0.94 Wetlands-Forested-->WETF 543.5344 1343.1006 5.63 Wetlands-Mixed-->WETL 1000.0179 2471.0943 10.35 Wetlands-Non-Forested-->WETN 31.5641 77.9966 0.33 Kentucky Bluegrass-->BLUG 195.8813 484.0326 2.03 Forest-Deciduous-->FRSD 2255.8207 5574.2458 23.35 Forest-Evergreen-->FRSE 430.7276 1064.3495 4.46 Agricultural Land-Row Crops-->AGRR 1361.6308 3364.6579 14.09 Orchard-->ORCD 42.0854 103.9952 0.44 SOIL: MI047 1494.9441 3694.0817 15.47 MI091 1787.5716 4417.1788 18.50 MI036 83.1747 205.5288 0.86 MI045 6296.3496 15558.5947 65.17

  16. Augusta Creek Simulations

  17. Land Use Impact

  18. Land Use / Soil Type Combinations

  19. Land Use / Soil Type Combinations

  20. Where to go from here? • Have the ability to perform a water balance on every soil in the state. • Available long-term daily weather data (100+ yrs) distributed across the climate regions of the state. • Need to finalize land use – management combinations • Begin mass simulations of combinations of soil / landuse / climate • Quality control – result analysis

  21. Questions

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