Fig. 2: Long-Term Annual Peak Streamflow Trends Across the United States. | Communications Earth & Environment

Fig. 2: Long-Term Annual Peak Streamflow Trends Across the United States.

From: Direct human interventions drive spatial variability in long-term peak streamflow trends across the United States

Fig. 2

This map illustrates observed peak streamflow trends at 3,907 USGS stations across the United States. Open circles indicate insignificant trends with color representing the direction of the trend slope (blue for positive, red for negative, and grey for zero), while upward and downward arrows represent statistically significant (p-value < 0.05) increasing and decreasing trends, respectively, based on a non-parametric method. The trends are expressed as a percentage of the standard deviation over 60 years, where a 100% change corresponds to one standard deviation change within this time frame. Blue color indicates positive normalized trend slope and red color indicates negative trend normalized slope.

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