HRU calculation

HRU calculation is one core functionality of the QGIS plugin QTalsim, designed to create hydrological response units (HRUs) suitable for Talsim. The plugin processes three layer, including a sub-basin layer, soil layer and land use layer. It clips the layers in accordance with the sub-basin layer’s boundaries. The plugin then intersects those three layers and creates HRUs. Additionally, the plugin offers functionality to remove duplicate geometries, overlapping features and unwanted gaps.

Input:

• Sub-basin layer

• Soil layer

• Land use layer

• CSV-file containing talsim land use types and parameters

Output:

• Geopackage containing HRU, land use, soil texture and soil type layers

• Layers are also added to the current QGIS project

• Getting Started with HRUs
  • Requirements for Input Layers
• Step by Step
  • Select Sub-basin Layer
  • Elimination of Hydrologic Response Units (HRUs)/small polygons
  • Select & Edit Soil Layer
  • Select and Edit Land use layer
  • Intersection of Layers
  • Save Layers as ASCII-Files & Geopackage
  • Optional Editing Steps