To get a better understanding of the wood flow and transportation objectives in the Crowsnest Pass we will start with harvesting and transporting wood from a single block before we run the scheduler.
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If you clikc on the button that 'Unselects all records in selected table'
you will notice that our harvested block has turned yellow to
represent the 'Regen' seral stage (see Figure 28, “Results of 'CC' harvest for block 13352” below).
Figure 28. Results of 'CC' harvest for block 13352
Each block in the dataset has been linked to the road network. When a block is harvested the model makes a decision about which destination should receive the wood and then tracks the route to mill and the associated costs.
Other valuable information about the routes in the model can be found in the corresponing route attribute table. This table is similar to the block attribute table but corresponds directly with the route. This table contains the original route shapefile information, as well as additional calculated attributes from Patchworks.
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Let's take a look at the route table while we only have a few active roads to look at.
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Each destination in the model will have a route attribute table that describes the segments and costs associated with each destination. A 'Network' table exists that combines the information for all routes into one table. |
Active routes are those line segments that have volume flowing over them in a particular planning period. To find the active segments we can query the route table.
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Scrolling to the far right of the table you will find information about how much volume flowed over each segment, what direction the volume flowed, how much it cost to haul, how much of the road was built and how much it cost. This table provides valuable information for diagnosis errors in the network, creating map layers and route reports. For more information see the section called “Route Tables”.
Our block also has an active route leading from the block to the mill. In the case of block 13352 the wood is flowing to MILL1 off the south end of the unit (You can zoom out to the full extent to see the entire route). The route that has been selected is the initial default route, and may involve construction of new candidate segments.
Now that we know how far the wood had to travel from the block to the mill and the exact route that was taken we can begin to explore some of the objectives for the Crowsnest Pass as a whole. We can get a better understanding of this by opening the necessary target charts for the harvest quotas and transportation objectives.