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Watershed and Sediment Model for Dryland Regions: Spain & Brazil

Explore land-use changes in semi-arid NE Brazil and sub-humid Pre-Pyrenees, Spain, using the innovative WASA-SED modelling tool. Monitor and model sediment transport dynamics, ecosystem stability, and land-water linkages for enhanced understanding.

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Watershed and Sediment Model for Dryland Regions: Spain & Brazil

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  1. WASA-SED: Application of a new modelling tool to dryland regions in Spain and Brazil E.N. Mueller, T. Francke, A. Bronstert, J.C. de Araujo, R.J. Batalla, A. Güntner, G. Mamede

  2. Semi-arid NE Brazil Sub-humid Pre-Pyrenees, Spain

  3. Shrubs and degradation

  4. Shrubs and degradation Conifers and erosion

  5. Land structural change: Network of artificial reservoirs within an area of 1060 km2

  6. Land structural change: Network of artificial reservoirs within an area of 1060 km2 Land-use change: Intensive agriculture followed by afforestation

  7. Impermanent Monitoring Stage-height sediment sampler

  8. Impermanent Monitoring Stage-height sediment sampler Permanent Monitoring Automatic bedload trap

  9. Impermanent Monitoring Stage-height sediment sampler

  10. Impermanent Monitoring Stage-height sediment sampler Permanent Monitoring Automatic bedload trap

  11. WASA-SED Model WASA-SED Model Sediment transport: Hillslope: MUSLE River: Transport / deposition as f(transport capacity) Reservoirs: Cascade-scheme for networks

  12. Cascade routing scheme for reservoir network For 5 reservoir size classes: Sediment flow trajectories:

  13. Modelling results: hillslopeWATER with intensive calibration

  14. with intensive calibration no calibration Modelling results: hillslopeWATER

  15. Modelling results: hillslopeSEDIMENT none

  16. Modelling results: hillslopeSEDIMENT none

  17. Modelling results: catchmentWATER with intensive calibration

  18. Modelling results: catchmentWATER with intensive calibration no calibration

  19. Modelling results: catchmentSEDIMENT

  20. Modelling results: catchmentSEDIMENT

  21. Land – Water – Linkagesfor the two study sites in Brazil and Spain: Sub-humid Afforested conifer Saturation excess flow Perennial Semi-arid Catinga shrub Hortonian flow Ephemeral Setting Burn and slash Network of reservoirs Disturbance Afforestation Decreasing for vegetation Decreasing for sediment  Barriers, Switches Increasing for vegetation Decreasing for sediment Buffer Connectivity Ecosystem Stability Unknown Increasing Importance for Community High Low

  22. Monitoring and Modellingfor the two study sites in Brazil and Spain: Bedload sampler Advanced technique High labour High equipment cost High data quality Stage-height sampler Simple technique High labour Low equipment cost Low data quality Monitoring Required: Quantification of transfer paths within landscape compartments No calibration Adequate results Intensive calibration Inadequate results Modelling Required: Implementation of connectivity features: barriers, buffers and switches

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