IIO409 · Conceptual hydrological model laboratory

◆ IIO409hydrological model lab

Choose a dataset

Choose a model

Parameter values Drag a slider to re-run the model

Edit slider ranges

Define a valid teaching range, then apply it to the sliders.

Choose a plot

Select the time window From To

Daily simulation

Integrated process view

Preparing data…

Shared analysis period

Drag either handle; the selected period is applied to every plot panel and all performance scores.

Move over the plot to inspect daily values.

Performance

Visible window, finite Q pairs

KGE: —
NSE: —
r (Pearson): —
R²: —
RMSE: —
PBIAS: —
Pairs: —

Reading key Observed Q Simulated Q Baseflow Precipitation / SWE

Parameter movement is a sensitivity experiment, not a calibration. Similar streamflow scores can hide different internal states.

Model and catchment context

Fact sheet

Read the evidence behind the equations

References and implementation notes

TUWmodel on CRANPackage documentation and source implementation. airGR · GR4JOfficial model interface and output definitions. airGR · GR6J-CemaNeigeOfficial combined snow and rainfall-runoff model interface. RcamelsCL::getDataReproducible source of daily inputs and observed streamflow. Parajka et al. (2007)TUWmodel structure and multi-objective calibration. Perrin et al. (2003)Development and evaluation of GR4J. Pushpalatha et al. (2011)GR6J structure for improved low-flow simulation. Valéry et al. (2014)CemaNeige sensitivity and snow-accounting formulation.

What this browser implementation does

The daily equations are ports of TUWmodel 1.1-1 and airGR 1.7.9. GR4J and GR6J use the same default reservoir initialisation as airGR. CemaNeige uses five equal-area elevation bands and Valéry's precipitation and temperature extrapolation. Because CAMELS-CL supplies elevation summaries rather than a 101-point DEM curve, the band elevations come from a documented hypsometric proxy preserving the reported minimum, median, mean and maximum elevations.

All simulations begin in 1979, so the default 2014–2019 display window has a long warm-up. Performance scores are diagnostic only; the sliders do not optimise parameters.