To have a proper rainfall surface, minimum three rain gauges are required. Adding a rain gauge is similar to adding other point hydrologic objects (e.g. AddHyd). To add rain gauges on map:

  1. Select Add->Rainguage in map context menu.
  2. Click on the map to add the rain gauge.
  3. Set the storm index pointing to the rainfall data in a rain group. It is recommended to use same storm index in different rain groups to avoid changing the storm index after switching between rain groups. In this context, the rain group is a collection of rainfalls happening at the same time but at different locations. It is recommended to name the rain group with the rainfall time range and to label the rainfall data with the rain gauge name.

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