Options for Viewing Current Data
1. Animated graphs of stream monitoring unit data can be
viewed and manipulated with the
Data Visualization Tool (DVT).
2. Data collected with stream monitoring units including
temperature, turbidity, electrical conductivity and water depth (Real Time Data) is available in both HTML tables and Excel tables.
3. Water Chemistry Data for water samples collected
periodically by DuluthStreams staff including nitrogen, phosphorus, pH,
and more is available in Excel tables.
4. Real time data viewed in Excel can be easily graphed
using a simple Excel graphing utility. (choose real time
data, then choose Excel format)
The 2002-2005 data posted has undergone QA/QC review. Real time data
sensors can, and do, at times produce unexplainable and erroneous data,
and periods of missing data. In addition, calibration periods are also
captured in the data stream. This data has been removed or adjusted
according to the QA/QC protocol.
Explainable data problems encountered included: missing data due to
transmission problems, erroneous depth readings due to blocked vent tubes,
turbidity spikes due to the mechanical sensor wiper malfunctioning,
increasing turbidity baseline values due to sensor fouling, and captured
calibration periods.
