WRM: Water Resources Model: dynamic water budget simulation

The Water Resources Model (WRM) is a dynamic simulation model to describe the water budget (daily, hourly) of a river basin, or more generally, any hydraulically coupled network system of sources (supply nodes) and sinks (demand nodes) of water.

The dynamic model, combining difference and differential equations, operates at arbitrary spatial resolution, and can cover very small basins of a few km extent to very large basins (e.g., the Nile or Yangtze) The basic principle is mass conservation.

Simulation period generally is one (water) year defined by a start month, with daily resolution, but within that famework, individual nodes can be described with higher temporal resolution, e.g., reservoirs (under flood conditions, when spilling).

The model is structured as a topological network of NODES and connecting REACHES (open channel or pipelines) with underlying aquifers.

WRM network scenario	Demand node configuration	Node water budget	Node water budget
Node editor, defining constraints	Model result time series export (CSV)	River Reach editor (open channel)	Model time series data