The environmental data of the lake at a glance Intelligent environmental monitoring is used at the Obersee to monitor, analyze, and optimize the water quality.

• The Johannisbachtalsperre, also known as the Obersee, is the largest body of water in the German city of Bielefeld.
• The artificial lake is approx. 14.5 hectares in size.
• The deepest point is approx. 2.5 meters.
• The lake is a popular recreational area and a retreat for many native animal species.

During hot periods of the year, the reduced water depth of the Obersee results in an increased risk of algae growth. This leads to increased oxygen consumption and can cause the water to become polluted. Fish stocks, for which oxygen in the water is essential for survival, are particularly affected.

Testing the water quality requires a considerable amount of effort because it involves a boat trip on the lake. The Environmental Agency has now implemented our Smart Environmental IoT system so that negative environmental influences can be identified in good time and the artificial aeration blowers will only aerate in the event of an acute lack of oxygen in the future.

At the Obersee in Bielefeld, environmental conditions are monitored effectively by a Smart Environmental IoT system. The Bielefeld Environmental Agency uses sensor technology to measure the water quality, including the clarity and oxygen levels. Data is also collected regarding the air quality and CO2 levels. Thanks to the integration of the Smart City Box, these values can now be recorded and evaluated around the clock. This is achieved by using LoRaWAN wireless technology and conventionally connected sensors, which enable the transmission of sensor data around and from the lake, thereby ensuring real-time monitoring.

The measured values collected from the lake and its surroundings can also be used to control the artificial aeration. If the local automation system detects negative values in the lake, aeration is activated at individual points of the lake in order to supply the fish with oxygen. The historical and current data can be easily accessed via a web-based IoT platform.

With the Smart City Box, you can easily combine city data – from the sensor to the control system. Data transparency helps cities identify targeted optimization measures for efficient and sustainable living spaces. The all-purpose box is easily connected to your existing infrastructure.

All applications are based on sensor data and wireless data transmission acquired in real time. Given its open system architecture, the Box can be easily integrated into both municipal computing centers and into many other IoT platforms.

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Using environmental data can provide towns and municipalities with a variety of benefits. For example, costs and resources can be saved by monitoring environmental conditions in real time and appropriate measures being taken immediately. To determine the current water quality, the Bielefeld Environmental Agency previously had to take samples from the lake several times using a boat. Now, however, the installed sensors in combination with the Smart City Box, allow these values to be recorded and evaluated at any time of day or night. So, by combining traditional automation and IoT applications, the Bielefeld Environmental Agency is opening up new possibilities for improving environmental conditions while also reducing the time and costs involved.