WaterWatch -- Current Water Resources Conditions |
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WaterWatch -- Current water resources conditions
Time series plot of 7-day average streamflow compared to historical streamflow for the day of the year (Indiana)
Explanation of the Streamflow Conditions Plots
The Average Streamflow Index, plotted as the red line on the above graphs, is calculated each day as the average of the streamflow index values for all the stream gaging stations in the state or water resource region having at least 30 years of record.
The streamflow index value at a station compares the 7-day average streamflow value to historical values for the day of the year.
Important Note: Gaps in the red line occur on days when less than two-thirds of the maximum number of stations in the state report data. On these days, confidence in the plot value is substantially reduced, and may even misrepresent actual conditions. To avoid potential bias in the presentation, no value is plotted for these days. The loss of data is usually related to equipment failure, computer problems, or telecommunications difficulties. Occasionally, widespread flooding events can disrupt data acquisition at a large number of station