Two tightly coupled engines — hydrodynamics and water-quality kinetics — solved on the same laterally averaged grid, from a single reservoir to a branched river-basin network.
Solves the laterally averaged equations of fluid motion to predict water-surface elevations, longitudinal and vertical velocities, density and temperature — the physics that drives stratification and transport.
Rides on the hydrodynamic transport to simulate dozens of interacting constituents — oxygen, nutrients, multiple algal and zooplankton groups, organic matter, carbonate chemistry and sediment exchange.
Because it resolves the vertical, CE-QUAL-W2 captures the processes that simpler 1D models cannot — thermoclines, selective withdrawal and density currents.
Group the state variables by the cycle they belong to. Modern releases let you define an arbitrary number of algae, epiphyton, zooplankton, CBOD and generic user constituents.
Derived variables, automatically. Beyond the state variables, the model reports derived quantities such as total nitrogen, total phosphorus, total organic carbon, chlorophyll-a, dissolved-oxygen saturation and pH — ready for comparison against standards and observations.
Represent the engineered controls that shape real reservoirs and rivers.
Selective withdrawal, multiple ports, structures and floating intakes.
Spillways, gates, weirs, pipes and pumps with rating curves.
Surface heat budget, evaporation and an ice-cover formation/melt model.
Inflows, outflows, meteorology and constituent loads as time series.
A few of the many study types CE-QUAL-W2 supports.
Download the model and the example data sets to see the workflow end-to-end.