Zweckverband Wasserwerk Wacken
Background and aim project
In 2008 the North German water works company Cooperating Water Works Wacken (Zweckverband Wasserwerk Wacken) was looking for a monitoring well measuring system. In a measuring field comprising 23 monitoring wells this system had to measure the water levels regularly and, at three specific measuring points, the conductivity as well.
The water works company runs various water extraction points, which must be managed in such a way that the water level in the connected aquifer does not sink below predetermined values. For this reason, they looked for a system in which the monitoring wells could be monitored several times a day via a telemetric system, and in which the resultant data would then be stored automatically in the control system. Decisions would then be taken concerning the management of the drinking water wells based on this data. The company wanted the control system to regulate this itself in the future.
The water works company wanted equipment that satisfied the following requirements:
- A reliable measuring system for measuring groundwater levels and electrical conductivity.
- A good price/quality ratio.
- Automatic preparation of telemetrically obtained data that can be implemented simply into the water works company’s system.
- The installation of the modem must take place in existing monitoring wells and be capable of vandal-proof closing.
What equipment did Eijkelkamp supply
Eijkelkamp has products in their assortment that satisfy these requirements perfectly. That is why the North German company bought, in the autumn of 2008, 20 Divers® by Schlumberger Water Services (for groundwater level and temperature measurements) and 3 CTD-Divers (which also measure the conductivity). To start with the loggers were read out only once every half year.
In the autumn of 2009, Eijkelkamp’s German distributor, Eigenbrodt GmbH & Co. KG, undertook the implementation of the data transfer. The e-SENSE® field modems were installed in a 4 inch monitoring well. The e-SENSE Direct Server was installed on one of the computers of the water works company. In the beginning the data was sent once a day in an ASCII file. A simple computer programme by Eigenbrodt converted this data so that it could be imported directly into the database.
Nowadays, using the Eijkelkamp equipment, the water works company receives the desired information several times a day, within minutes of sending. Precisely as they had envisaged in 2008.