With a passion for science and the environment, and educated in Earth Sciences, Jani is well placed to take on the challenge of managing Van Walt South Africa. The rest of the team at Van Walt will be supporting her all the way with this exciting new venture.Meet the team
The Requirement: South Africa is a water scarce country that relies heavily on groundwater, for agricultural, industrial and domestic use. Level and quality data of groundwater is therefore essential to manage the water resource to ensure that the water resources aren’t exploited or contaminated but rather used sustainably.
Solution: DataSlaves connected to multiparameter probes were installed to monitor the level and quality of multiple boreholes that is connected to the water supply system of the property. The DataSlaves communicate with the DataHub and the Hub reports back to the customers cellphone, tablet or computer. Dependant on the data, pumps can be either switched on and off via the alarm functionality.
The Requirement: Surface water flow and groundwater level and quality data is imperative to determine whether a farmer can extract water and whether the water quality is suitable for irrigation. Telemetry is essential due to the remoteness of the location. Data will also need to be accessed daily.
Solution: Installation of a DataHub and two DataSlaves to monitor the creek flow and groundwater level and quality with the intention of investigating the availability of water and the quality thereof for irrigation. Two DataSlaves are installed. The first is connected to a high precision Keller sensor, with a 0-30 cm fluctuation, for creek flow monitoring and the second is connected to a CTD multiparameter sensor for groundwater level and quality monitoring. Both DataSlaves reports to the DataHub via radio frequency which is installed further down the valley. The Hub then reports back via GPRS straight to our customers desktop.
The Requirement: Monitoring the quality of mine wastewater and the flow of dewatering systems, often across large sites, is essential to prevent contamination and to control the amount of water in the pit during mining operations.
Solution: To monitor several different parameters across a large site of several square kilometers, cabling was expensive and impractical, with heavy vehicles continuuously accessing the area. And, with a need to monitor the whole 'picture', we installed a combination of one DataHub, three DataSlaves and sensors to capture level, temperature, conductivity, turbidity and flow data.
The Requirement: Water abstraction permissions to a ski field operator are essential. The flow rate of mountain streams determines the amount of water available for making artificial snow. The higher the flow rate, the more water available for snow production. Low flow rates implies that the stream does not have excess water and can only sustain the natural environment. The regulator requires flow rate data on a daily basis to monitor the sustainability of the streams.
Solution: A combination and network of flumes and Data Collection equipment has been installed on a popular ski resort in New Zealand’s South Island. Flumes are installed to derive water flow data of the mountain streams. Dependant on the data, pumps are either switched on and off via the alarm functionality. A similar system is also used to switch off the pumps when the turbidity is too high, which could damage the pumps. Data is automatically sent to the regulator daily via FTP.
The Requirement: Prior to the start of construction, monitoring of water quality is essential to determine the impact it may have on the quality of nearby water supply sources, specifically in terms of turbidity.
Solution: The deployment of a network of DataHubs and DataSlaves, attached to single parameter water quality sensors to monitor turbidity have been installed. Data is collected every 15 minutes and uploaded hourly, directly to the regulator and other interested parties.
The Requirement: A study commissioned by the University of Santiago de Compostela, who are involved with a government project on the island of Salvora, one of the Atlantic Islands of Galicia National Park. They are investigating the correlation between climate change, and the growth of certain native plant species on the island. Soil moisture and EC are some of the parameters that will be monitored.
Solution: Multiple HydraProbes and a Soil Moisture Probe from the Stevens Water range, have been installed on the island connected to our DataHub. This particular installation monitors soil moisture, salinity and temperature. As a remote island, site visits are not always easy, therefore our telemetry equipment allows the customer to access data straight to their desktop from anywhere in the world. Our DataHub can connect to multiple sensors. In this particular installation, Van Walt has used a junction box to accommodate all the sensors.