Anyone knows what is the exact default area of a junction and the possible ways to input an another area for the junstion?

Thanks

Anyone knows what is the exact default area of a junction and the possible ways to input an another area for the junstion?

Thanks

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## Replies

The area of a junction is "0".

Junctions are just connectors which don't have any surface area.

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.

//

// 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.