HydroMonitor 1.0


Successor to Menyanthes offers quick understanding of groundwater condition

HydroMonitor 1.0

HydroMonitor is a multi-faceted tool for a quick and easy unravelling of the hydrological situation of an area. As the successor to Menyanthes – a popular program for time series analysis, which is used by more than 150 Water Authorities, provinces, municipalities, water utilities and land managers, both in the Netherlands and internationally – HydroMonitor 1.0 offers the possibility of gaining a clear understanding of the external influences on the groundwater. Following years of development, surveys of user wishes, and research into the best methods to prepare the program for future developments, HydroMonitor 1.0 was officially launched in May 2022.

HydroMonitor is built upon Menyanthes, but its basic design makes use of new data sources for its international use and integration with supplementary modules. In addition to parts of the Menyanthes code, HydroMonitor is based on the

Collenteur, R.A., Bakker, M., Caljé, R., Klop, S.A., Schaars, F. (2019) Pastas: open source software for the analysis of groundwater time series. Groundwater. doi: 10.1111/gwat.12925. https://github.com/pastas/pastas

for time series analysis. At present, HydroMonitor 1.0 contains all the functionalities for time series analysis and visualisations from Menyanthes (known as ‘Hydro-Times’). In the future the program will be further expanded to include, for example, a groundwater quality analysis tool (HydroGeoChemistry) and a spatial analysis tool (HydroSpace).

Grip on groundwater systems

HydroMonitor is generally applied in a variety of ways to get a grip on groundwater systems. For example, to assess whether water management measures have the desired impact on groundwater levels. Or to quickly produce groundwater statistics from a time series set. HydroMonitor can of course also be used to predict groundwater levels in scenario studies.

A multi-faceted tool for the hydrologist

Groundwater levels are influenced by a variety of factors, such as precipitation, evaporation, groundwater abstraction and the water level of streams, canals and rivers. With HydroMonitor every hydrologist and ecologist can analyse time series, with no need to invest the time and have the scientific expertise that is required by other programs. This is because basic knowledge about the hydrological behaviour of groundwater systems is embedded in the program. HydroMonitor supports the user with clear visualisations during all stages of the processing. A couple of mouse clicks produce a hydrological area representation, which can provide the basis for further analysis.

Complete picture from national data sources

The program can import data from national data sources, such as the Royal Netherlands Meteorological Institute (KNMI), the Key Registry of the Subsurface (BRO), REGIS and DINO. Thanks to the complete picture produced from these data sources, HydroMonitor can:

  • show the location of the piezometers on a topographic or satellite-photo background;
  • show a cross-section with the depth of the piezometer filters, possibly in combination with borehole sampling;
  • show a graph of the evolution of the groundwater level over time;
  • process the data interactively;
  • determine the statistical properties of the groundwater level series, such as timelines, regime curves and GxG values.

Because HydroMonitor combines knowledge about the hydrological system with data-driven models, it can efficiently model time series with explanatory variables, such as (surplus) precipitation, evaporation, groundwater abstraction and surface water levels. It can also take into account (step) trends. HydroMonitor offers the possibility of conducting time series analysis according to the Box-Jenkins method, and carries out the necessary interpolation to a fixed measurement interval or automatic resampling. The time series models are stored and can be easily modified or tested, for example, with regard to their response functions, calibration statistics or statistical properties.

If you are interested in HydroMonitor, or would like to receive further information about it, you can contact our support team directly: .