HydPy-D (DAM)¶
The HydPy-D model family implements dams and similar natural and anthropogenic flow barriers.
At the current state of development, all its application models rely on an
adaptive explicit Runge-Kutta method. This integration method allows for
performing simulations with adjustable numerical precision. However, it works
best for continuous differential equations. Hence, most process equations of
base model dam are either continuous by nature or “regularisable”, meaning
one can smooth their discontinuities by a degree one considers useful.
Each application model provides a different combination of control capabilities. Many take “remote locations” into account, for example, to release additional water to the downstream river channel to increase water stages at remote gauges.
All application models are tested and ready for use. However, please note that some improvements in style and structure (e.g. changes in some variable names) might be necessary for the future. At the moment, it is a little hard to pick the correct application model. We will have to find a way to prevent selecting a suitable model from becoming too hard when the collection of application models grows. For the moment, the following overview over the first five application models might be helpful:
Does the dam model… |
v001 |
v002 |
v003 |
v004 |
v005 |
|---|---|---|---|---|---|
…calculate the demand at a remote location itself? |
yes |
no |
no |
no |
yes |
…lie in a river upstream of the remote location? |
yes |
yes |
no |
no |
yes |
…tell another model if it cannot supply the remote demand? |
no |
no |
no |
no |
yes |
…discharge to another remote location for flood protection? |
no |
no |
no |
yes |
no |
…ask for additional water supply from a remote location? |
no |
no |
no |
no |
yes |
…allow for discharge from a remote location for flood protection? |
no |
no |
no |
no |
yes |
These five application models are independent implementations, developed for
the forecasting system of the German federal state of Saxony and run by the
Landeshochwasserzentrum (LHWZ). More recently, we added the application
models dam_v006, dam_v007, and dam_v008 on behalf of the German Federal
Institute of Hydrology (BfG). Conceptionally, these HydPy models
correspond to the LARSIM models “SEEG” (controlled lake), “RUEC” (retention
basin) and “TALS” (reservoir).
dam_v001 has been the starting point for the development of the other
application models. Hence its documentation is very comprehensive, and it seems
to be a good starting point to become acquainted with any of the application
models prepared so far.
Base model:
Application model: