SDC Sphy Manual
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  • manual
    • SPHY Manual
      • 1. Introduction
      • 2. Theory
        • 2.1 Background
        • Modules
        • Reference and potential evaporation
        • Dynamic vegetation processes
        • Snow processes
        • Glacier processes
        • Soil water processes
        • Soil erosion processes
        • Routing
      • 3. Applications
        • Irrigation management in lowland areas
        • Snow- and glacier-fed river basins
        • Flow forecasting
      • 4. Installation of SPHY
      • 5. SPHY model GUI
        • 5.1 Map canvas layers and GUI interactions
        • 5.2 Top menu buttons
        • 5.3 General settings
        • 5.4 Climate
        • 5.5 Soils
        • 5.6 Groundwater
        • 5.7 Land use
        • 5.8 Glaciers
        • 5.9 Snow
        • 5.10 Routing
        • 5.11 Report options
        • 5.12 Running the model
        • 5.13 Visualizing model output
      • 6. SPHY model preprocessor v1.0
        • 6.1 Overview
        • 6.2 General settings
        • 6.3 Area selection
        • 6.4 Modules
        • 6.5 Basin delineation
        • 6.6 Stations
        • 5.7 Meteorological forcing
      • 7. Build your own SPHY-model
        • Select projection extent and resolution
        • Clone map
        • DEM and Slope
        • Delineate catchment and create local drain direction map
        • Preparing stations map and sub-basins map
        • Glacier fraction map
        • Soil hydraulic properties
        • Other static input maps
        • Meteorological forcing map series
        • Open water evaporation
        • Soil erosion model input
        • Sediment transport
        • Reporting
      • Appendix 1: Input and Output
      • Appendix 2: Hindu Kush-Himalaya database
      • References
      • Copyright
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Soil hydraulic properties

All processes related to the soil, such as infiltration, percolation, and capillary rise, are determined based on soil hydraulic properties. These include field capacity, saturated water content, wilting point, permanent wilting point and saturated hydraulic conductivity. These soil properties need to be provided for the root zone and the subzone. PCRaster maps can be provided for each of these properties, which can be obtained from field measurements or through the application of pedotransfer functions. The output from pedotransfer functions is also available at global scale, for instance from the Harmonized World Soil Database. The user may also provide soil texture (sand and clay fractions), organic matter and bulk density maps. Then, the soil hydraulic properties are determined through the application of pedotransfer functions (Saxton & Rawls, 2006).

FutureWater developed a global map of soil hydraulic properties (HiHydroSoil). See also: https://www.futurewater.nl/2015/07/soil-hydraulic-properties-nl/

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Last updated 1 year ago