Getting Started with HRUs
-------------------------
.. _getting-started:

Requirements for Input Layers
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   .. _requirements-for-input-layers:


   All three necessary input layers must be polygon layers and included in the
   current QGIS project. Additionally a raster DEM layer can be used as input to calculate the slope. 

   #. Sub-basin layer

      This layer should contain the sub-basins as well as a field for
      Unique Identifiers and another one for slope.

   #. Soil Layer

      This layer should contain all soil types within the study area and can consist of up to 6 soil layers. It must contain at least a
      field specifying the names of the soil types of one soil layer.

   #. Land Use Layer

      This layer should contain all land use areas within the study
      area, and it must contain a field specifying the names of the land
      use types. 

   #. Optional: DEM Layer

      The DEM layer is optional, and if a DEM layer is uploaded, the slope for each HRU will be calculated.


   Continue to the next section for detailed step-by-step instructions: `Step-by-Step Guide <https://sydroconsult.github.io/QTalsim/hrus_step_by_step.html>`__