Nodes of different colours represent the following:
Solid arrows point from a submodule to the (sub)module which it is
descended from. Dashed arrows point from a module or program unit to
modules which it uses.
Where possible, edges connecting nodes are
given different colours to make them easier to distinguish in
large graphs.
read water allocation inputs
read source object data
read demand object data
for hru irrigtion, need to xwalk with irrigation demand decision table
xwalk with lum decision table