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RHESSys Pieces Coupling water, carbon, nutrients

RHESSys Pieces Coupling water, carbon, nutrients. L. Band, C. Tague. Key processes incorporated in RHESSys. Water, carbon, nutrient cycling in situ interception, evaporation, transpiration, infiltration photosynthesis, respiration, allocation,

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RHESSys Pieces Coupling water, carbon, nutrients

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  1. RHESSys Pieces Coupling water, carbon, nutrients L. Band, C. Tague

  2. Key processes incorporated in RHESSys • Water, carbon, nutrient cycling in situ • interception, evaporation, transpiration, infiltration • photosynthesis, respiration, allocation, • decomposition, mineralization, N-cycling, plant uptake • Lateral water redistribution • surface runoff • saturated throughflow • Groundwater recharge/discharge

  3. The watershed as an object hierarchy • Land surface processes have characteristic scales and locations within the landscape • synoptic meteorological inputs: region • regional groundwater flow: aquifer system • stream routing: watershed • runoff production: hillslope • soil/canopy/atmosphere interactions: vegetation stand • saturated/unsaturated zone dynamics: pedon

  4. RHESSys-00 CENTURY NGAS MODIS-BGC RHESSys-96 BIOME-BGC GLOBAL-BGC Evolution of the RHESSys paradigm

  5. Infrastructure impacts on flowpaths

  6. RHESSys Object Hierarchy

  7. Full vs. Aspatial Distribution Approach

  8. Patch

  9. Conceptual Model

  10. Hierarchical watershed structure

  11. Pond Branch Catchment – ControlColor Infrared Digital Orthophotography

  12. Pond Branch Catchment – ControlTopographic Index

  13. Spatial Pattern of Soil Moisture

  14. Spatial Pattern of N-export

  15. RHESSys Model Performance High Summer Stream nitrate conc. for both model and stream sampling Corresponding with lower summer denitrification due to drying of the soil

  16. Effects of Roads

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