Area of a Junction

Replies

Upaka August 11, 2010 at 11:39am

I found the answer for my own question and would like paste it here if anyone needs it in future.
The area of a junction is "0".

Junctions are just connectors which don't have any surface area.
- Robert Dickinson > Upaka August 11, 2010 at 1:29pm
  
  If the node is empty the area of a junction is the default area of the junction - the smallest area of a junction is not zero
  - Upaka > Robert Dickinson August 11, 2010 at 5:46pm
    
    Hi,
    thanks a lot for this clarification.
    I was looking for this and I couldn't find this value.
    I asked from the author of the SWMM 5.0 and I was told that the default value is 0.
    
    However I now know how to adjust it.
    
    Thanks again.
    - Robert Dickinson > Upaka August 11, 2010 at 6:01pm
      
      void initNodeState(int i)
      //
      // Input: i = node index
      // Output: none
      // Purpose: initializes node's surface area, inflow & outflow
      //
      {
      // --- initialize nodal surface area
      if ( AllowPonding )
      {
      Xnode[i].newSurfArea = node_getPondedArea(i, Node[i].newDepth);
      }
      else
      {
      Xnode[i].newSurfArea = node_getSurfArea(i, Node[i].newDepth);
      }
      if ( Xnode[i].newSurfArea < MinSurfAreaFt2 )
      {
      Xnode[i].newSurfArea = MinSurfAreaFt2;
      }
      
      // --- initialize nodal inflow & outflow
      Node[i].inflow = Node[i].newLatFlow;
      Node[i].outflow = 0.0;
      Xnode[i].sumdqdh = 0.0;
      }
      
      As you can see above there is a minimum surface area and it is NOT zero - it is normally set by the user or defaults to 12.566 square feet.
      - Upaka > Robert Dickinson August 11, 2010 at 6:03pm
        
        yeah I understood it. Thanks again for helping me to find out the things.