Reference & User Manual
|Release Level||7.0||Release Date||2016 12||Revision Level||beta|
|Last modified on: Saturday, 5-Nov-16 17:33 CET|
Topological Network Structure
The water resources model WRM is implemented as a topological network model, consisting of NODES, connected by REACHES. A well formed network must have at least one START (inflow) node and at least one END (outflow) node.
A network can represent any "hydraulically coupled system", which is not necessarily a river basin or catchment, but can be any arbitrary part, or the combination of several basins/parts including interbasin transfers.
The resulting network is not necessarily a true spatial" representation; its underlying principle is "logical connectivity" rather than geographic location.
Similarly, the association between NODES, REACHES, and underlying aquifers is a gain a logical one, i.e., network OBJECTS are "assigned" to an aquifer explicitly rather than implicitly by location. A similar logic is used to assign (spatial) meteorological parameters (precipitation, temperature) to objects that have a defined extent (e.g., for lateral inflow along reaches, or the immediate catchment of a reservoir, or evapotranspiration losses).
Nevertheless, a network can be "mapped" as the NODE attributes can include geographic coordinates.
Among the advantages of the network structure is the "arbitrary precision" or resolution that it supports compared to any fixed grid representation.
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