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Experiments and Modeling of Water and Energy Transfer in Agro-ecosystem Yi LUO Zhu OUYANG

This study presents experiments and modeling of water and energy transfer in agro-ecosystems. It explores the framework and components of the integrated ecological modeling (IEM) at field and regional scales, and validates the models. The study focuses on soil processes, groundwater processes, land use/cover, and crop and soil system modeling. The expected outcomes include understanding the dynamics of shallow groundwater table, effects of land use change on water quantity and quality, and preservation of wetlands.

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Experiments and Modeling of Water and Energy Transfer in Agro-ecosystem Yi LUO Zhu OUYANG

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  1. Experiments and Modeling of Water and Energy Transfer in Agro-ecosystem Yi LUO Zhu OUYANG Yucheng Comprehensive Experiment Station, CAS Sept, 2002

  2. Outline (1) Background (2) IEM in Field Scale Frameworkand Componentsof the Model Field Exp., Model Validation (3)IEM in Regional Scale (4) No Conclusion

  3. RS Ground monitoring Land Use/Cover Integrated Ecological Modeling Soil Processes in Field Scale Groundwater Processes in Regional or Watershed Scale Background CropS: Crop and Soil system model SWAT/MODFLOW

  4. IEM in Field Scale-Framework and Components

  5. IEM in Field Scale- Framework and Components Currently, CropS can simulate: (1) Soil water dynamics, infiltration (2) Evaporation and transpiration (3) Root water uptake (4) Drainage percolation (5) Photosynthesis, and (6) CO2flux from canopy

  6. FeddesModel Root Density Profile Function Modified FeddesModel IEM in Field Scale- Framework and Components Modified Feddes Root Uptake Model

  7. IEM in Field Scale- Field Exp. And Validation Soil and Root Profiles Sampling

  8. IEM in Field Scale- Field Exp. And Validation Root length density profile(CI201) Samples of winter wheat root

  9. IEM in Field Scale- Field Exp. And Validation Soil properties and parameters: (1) Texture (2)Retention curves (3)Hydraulic conductivities Soil Physics Lab, Yucheng Agri. Exp. St.

  10. IEM in Field Scale- Field Exp. And Validation SPACSystem Observations： (1) Soil and Root profiles (2) Soil moisture profile and groundwater level (3) Transpiration by lysimeter (4) Crop growth (5) Meteo. factors、CO2 flux (6) Leaf photosynthesis and stomata resistance Yucheng Agri. Exp. St.

  11. Volumetric soil water content Soil depth (cm) Comparison among soil water profiles simulated by different root uptake models IEM in Field Scale- Field Exp. And Validation

  12. IEM in Field Scale- Field Exp. And Validation Comparison among soil profiles by CropS and the measured

  13. IEM in Field Scale- Field Exp. And Validation Comparison of ET Between CropS to Bowen Ratio Approach Correlation Analysis Diurnal Process of ET

  14. IEM in Field Scale- Field Exp. And Validation CO2 flux calculated with Bowen Ratio approach Comparison of CO2 fluxes by CropS and measurement

  15. IEM in Field Scale- Field Exp. And Validation Percolation processes simulated by CropS at the depths of 100cm and 200cm, respectively

  16. Eco-hydrological System RS Info. SWAT IEM Interface MODFLOW Eco-hydrological Processes Modeling in Watershed Scale IEM in Watershed Scale

  17. IEM in Watershed Scale Target areas Hetao Irrigation District 11000KM2 Panzhuang Irrigation District 3300KM2

  18. IEM in Watershed Scale Expected Outcomes Dynamics of shallow groundwater table under influence of change of land use/cover irrigation (diversion from Yellow river and groundwater use) Effects of shallow ground water table fluctuation on land salinization desertification wetland preservation(water quantity and quality)

  19. No Conclusions

  20. Thanks For Your Attention !

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