What is a Data Sonde?

DATA SONDES

are equipped with sensors that measure such things as temperature, pH levels, dissolved oxygen, and turbidity.

Our commitment to restoring colder, cleaner water in the lower Deschutes River includes a scientifically rigorous water quality monitoring program. This program involves collecting long-term water quality measurements at several locations along the river utilizing a monitoring device known as a data sonde.

In simple terms, a data sonde is a sophisticated device designed to collect water quality data. It is equipped with sensors that measure various parameters including temperature, pH levels, dissolved oxygen, and turbidity. These sensors are linked to a data logger, enabling real-time data collection and transmission. The data sondes used by the DRA are calibrated in accordance with DEQ standards and protocols, ensuring the data collected meets the highest level of data accuracy.

Once deployed in the river, the data sondes collect data every hour from spring through the fall. The sondes are continuously monitored while deployed, and are routinely checked against handheld meters.

These independent field measurements, called audits, verify that the sensors are functioning properly and confirms that the data being collected is accurate and of high quality. During winter, when cold temperatures pose risks, the sondes are temporarily removed and sent in to the manufacturer for maintenance to ensure they are accurately calibrated.

The DRA has two data sondes deployed—near Madras and Maupin—and a third going in at the mouth of the river. By monitoring key indicators at these sites, such as changes in temperature or fluctuations in pH, we are able to better understand ecosystem impacts resulting from SWW tower operations and monitor for water quality violations.

In short, data sondes allow for the real-time monitoring of rivers, providing comprehensive data that can be used to assess the ecological health of a system. By detecting changes and potential threats to water quality, they help us to make informed and scientifically-based decisions to safeguard the lower Deschutes River for both current and future generations.

Hannah Camel, Water Quality Coordinator