© WMD, The Monitoring wells are located in beautiful spots Drinking water with a future
Mentink is working on understanding the effects of local activities on the surrounding area and vice versa. This involves evaluating the risks and monitoring certain critical performance indicators: “We are turning from a management business into an investment organisation that aims to be future-proof.
How can we make sure that adequate supplies of good-quality drinking water will still be coming out of our taps in 2100? In the past we were mainly concerned with extracting water from the ground to produce drinking water, but now we are increasingly focusing on the effects of these activities in the region. Our key considerations are integrating our business more effectively into the water system and, together with our stakeholders, searching for the best-quality drinking water, both now and in the future.
We have to monitor all types of developments and attempt to predict what will happen in relation to demographics, the climate and the quality of the environment. Water catchment areas need a lot of time to develop, so if we have to expand them, we must start the process very far in advance.”
Comprehensive monitoring network
While Mentink is concerned for the future, Snelders is busy making the most of the present. In the past, fi ve people were needed to carry out the surveys manually twice a month, but now technology has taken over. “In future, we plan to carry out on-site surveys, but only twice a year. Digitalising our systems has given us much more time for maintenance at the different bore holes. As a result, I look at the area quite differently as I drive through it and pay much more attention to changes.”
As head of the monitoring network, Snelders now has everything under his control and is focusing specifi cally on the quality of the network, which means greater commitment and responsibility. He says, with legitimate pride: “The data quality and, in particular, the density and accuracy of the measurements have improved signifi cantly.”
© WMD, Supplying drinking water to 200’000 premises
The monitoring network is being laid out around the water catchment areas. The job of the network is to monitor the effects of groundwater extraction and this work is done mainly by DCX-22AA data loggers from KELLER. “The province of Drenthe investigated the market to fi nd suitable measuring instruments and KELLER Pressure offered the best price-performance ratio. The atmospheric pressure compensation system is very simple and convenient. We don’t actually have to do anything. Everything is extremely user friendly and we can easily link a serial number to a location,” say Mentink and Snelders.
Atmospheric pressure compensated level logger system
At the bottom of the measurement shaft is a level sensor which is connected by a fi xed cable to the battery pot at the top. The entire component hangs from an adapter ring so that the monitoring shaft can be sealed. The atmospheric pressure compensation is carried out by a second pressure sensor at the top of the shaft. The real-time atmospheric pressure compensation allows the DCX-22AA to be used in measurement shafts to record the groundwater level and sewage overfl ows. The entire system is watertight (IP67) to ensure that it remains undamaged if the measurement shaft fl oods.
© WMD, The high-quality monitoring network belonging to WMD
The PC connection is on top of the monitoring shaft pipe, which allows the logger to remain in the pipe during the read-out
© WMD, Hydrostatic level measurement with a KELLER data logger
process. This has the major benefi t that the current measured value can be seen live, which means that it is very easy to compare it with a manual value. The atmospheric pressure compensation system makes additional air pressure loggers superfl uous and, as a result, they do not have to be installed or read. Manual atmospheric pressure compensation is also not required, which is an advantage for the operation of the system.
A happy and poetic end to the project
The digitalisation and automation project brings benefi ts for the environment and for everyone involved. All the measured values are checked and any faults are rectifi ed. WMD Drinking Water has a clear overview of the system. Mentink draws a poetic conclusion: “We now have one single genuine source of the truth, the absolute truth, when it comes to our data.”
© WMD, Production station Ruinerwold
KELLER Pressure
St. Gallerstrasse 119, 8404 Winterthur, Switzerland Tel: +41 52 235 25 25
Email:
info@keller-pressure.com Web:
keller-pressure.com
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