Ben-Gurion University of the Negev Jacob Blaustein Institutes for ...

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So that, for a network composed by 4 sources and 5 destinations there are 20 possible
arcs of transportation (see figure 12). ArcGis was used to measure the relevant
characteristic of the network: a) location of the nodes; b) length of the arcs; c) elevation
of every supply and demand node.
Figure 10 – Network representation and arc length
3.9 From the Transportation Model to the Transshipment
Network
The transshipments network was built on the basis of the solution obtained from the
transportation model. Figure 11 shows the transshipment network overlapped on the
solution of the transportation problem. Light blue arrows show the directions and the
amounts of water transported from sources to destinations.
The layout of the transshipment network was made on the basis of the following
considerations:
a) The number of supply nodes were reduced from 4 to 2. Supply n.91 and n.86
were grouped in a single node and nodes n.86 and n.78 were excluded because
they provide a negligible supply;
b) The number of demand nodes was reduced from 5 to 4. Demand nodes n.84 and
n.85 were grouped in a single node;