Properties of the whole river network

• RivEX can analyse the basic properties of a river network.

• The whole network is included in this analysis, the output does not differentiate between catchments.

• To compute the basic properties you must complete the parameters section of the main interface and press build to construct the dictionaries used to analyse the river network.

• Select the Analyse Network tab, tick the Basic properties checkbox and start the process by clicking on Go!

• Once the process has finished, you will be asked where to direct the output as shown below

• Select YES sends the output to MS Excel.  The Excel application will minimise when data transfer has completed, do not click on the window until this has happened!

• Select NO sends the output to a dbase file called Basic_Network_Properties.dbf stored in C:\RivEX\Output.  If this file exists already you will be asked to overwrite it.

• The basic properties of the network extracted are:

• Number of polylines in the network
• Total number of vertices in the network
• Minimum polyline length
• Maximum polyline length
• Sum polyline length
• Mean polyline length
• Number of Nodes
• Number of Mouths
• Number of Sources
• Number of Pseudo nodes
• Number of nodes with valency X*
• Number of interior links
• Number of exterior links
• Number of outlet links

* = This row will expand to however many required depending upon the largest valency.