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. Day-trans MT-CLIM Forest-BGC RESSys-89 W-DTM DHSVM routing GLOBAL-BGC BIOME-BGC RHESSys-96 CENTURY NGAS RHESSys-00 MODIS-BGC Evolution of the RHESSys paradigm

5. Infrastructure impacts on flowpaths

6. RHESSys Object Hierarchy

8. Full vs. Aspatial Distribution Approach

9. Patch

12. Conceptual Model

13. Hierarchical watershed structure

15. Pond Branch Catchment – Control Color Infrared Digital Orthophotography

16. Pond Branch Catchment – Control Topographic Index

19. Spatial Pattern of Soil Moisture

20. Spatial Pattern of N-export

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

22. Effects of Roads