Download Reference Manual

Printed Documentation
Convergent and Divergent Links
xprafts currently allow both convergent and divergent link networks. The normal convergent system is displayed in the
example shown in the figure above.
Divergent flows are handled by defining a link capacity for the sub-catchment in question followed by a separate link
number to which overflows are directed.
The overflow stored in the separate link can either be removed from the network completely or can rejoin at a lower
junction by normal linking procedures.
In addition, the user may set a fraction of the flow to be diverted once flow exceeds a threshold, through the use of a
diversion link in xprafts.
Development of Catchment, Channel & Network Data
The main components of the catchment model are the sub-catchments, links and subareas defined in Definition of
Link.
The arrangement, sequencing and number of individual elements is made entirely flexible to appropriately represent
watershed components. Nodes representing the outlet of individual sub-catchments and links are described
graphically within the user environment.
220