Monitoring network, Driebergen-Zeist station
Copijn (designs, advises, realises and manages green living environments)
Eijkelkamp Soil & Water
The railway crossing near Driebergen-Zeist station causes great delays in general traffic flow. To improve this flow, Prorail and the Municipalities Utrechtse Heuvelrug and Zeist will construct a tunnel to enable traffic to drive under the railway line.
The construction of a tunnel has significant consequences on groundwater extraction and general soil moisture patterns. Many old to extremely old trees are located in the adjacent plots. These trees could suffer from dehydration as a consequence of reduced groundwater levels.
To map out the effect of the tunnel construction on trees Copijn has been contracted to monitor moisture levels around the tunnel. During the project Copijn will also raise the alarm if tree condition and moisture levels deteriorate. The project may also continue after the tunnel construction in order to monitor the long-term effects.
As well as soil measurements, a rain gauge has been positioned to monitor how much rain falls at the site of the monitoring network. This rain gauge has been installed to determine the influence of rainfall on hydrological processes in the soil. Rainfall can decrease, for example, which would also reduce soil moisture, but such a reduction would not be caused by the tunnel construction.
Eijkelkamp Soil & Water has positioned 1 e+ RAIN rain gauge, 2 Diver water level loggers, 4 e+ SOIL MCT sensors, 3 Global Data Transmitters Multiple (modems) and 16 PlantCare Mini-Loggers to measure the various hydrological components. Eijkelkamp Soil & Water also provides annual maintenance and will continue to offer support regarding measurement requirements.
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