Trends in selected streamflow metrics at reference streamgages in the conterminous United States, 1955-2014

Dates

Publication Date: 2019-12-12
Start Date: 1955
End Date: 2014

Citation

Wolock, D.M., Eng, K., McCabe, G.J., and Carlisle, D.M., 2019, Trends in selected streamflow metrics at reference streamgages in the conterminous United States, 1955-2014: U.S. Geological Survey data release, https://doi.org/10.5066/P95MASAV.

Summary

This dataset includes four tables related to annual trends in streamflow metrics at 599 reference streamgages in the conterminous United States for the period 1955-2014. Reference streamgages are defined here as gages with drainage basins that are minimally impacted by anthropogenic effects such as reservoirs or urbanization. The four tables are: 1) computed annual values for 16 streamflow metrics, 2) trend estimates for the 16 streamflow metrics for the period 1955-2014, 3) metric names and definitions, and 4) location information (latitude and longitude) for the 599 sites. The computed annual values for the 16 streamflow metrics are: low flow magnitude, low flow frequency, low flow duration, high flow magnitude, high flow frequency, [...]

Summary

This dataset includes four tables related to annual trends in streamflow metrics at 599 reference streamgages in the conterminous United States for the period 1955-2014. Reference streamgages are defined here as gages with drainage basins that are minimally impacted by anthropogenic effects such as reservoirs or urbanization. The four tables are: 1) computed annual values for 16 streamflow metrics, 2) trend estimates for the 16 streamflow metrics for the period 1955-2014, 3) metric names and definitions, and 4) location information (latitude and longitude) for the 599 sites. The computed annual values for the 16 streamflow metrics are: low flow magnitude, low flow frequency, low flow duration, high flow magnitude, high flow frequency, high flow duration, skew, daily rises, Spring low flow percentage, Spring high flow percentage, Summer low flow percentage, Summer high flow percentage, Fall low flow percentage, Fall high flow percentage, Winter low flow percentage, and Winter high flow percentage. The annual flow metrics were estimated by Eng and others (2017) from daily streamflow records at the 599 reference streamgages. Sen slope trend values and confidence intervals for the 16 flow metrics for the period 1955-2014 were computed from the annual time series using the non-parametric Theil-Sen approach (Sen, P., 1968). In addition to the Sen slope, the median value for each metric for the period 1955-2014, the percentage change in each metric over the period 1955-2014, and a percentage change class for each metric also are reported.

Contacts

Point of Contact :: David M Wolock
Originator :: David M Wolock, Ken Eng, Gregory J McCabe, Daren M Carlisle
Metadata Contact :: David M Wolock
Publisher :: U.S. Geological Survey
Distributor :: U.S. Geological Survey - ScienceBase
SDC Data Owner :: Office of Planning and Programming
USGS Mission Area :: Water Resources

Attached Files

Click on title to download individual files attached to this item.

metric_names.csv		1.76 KB	text/csv
metric_values.csv		3.47 MB	text/csv
sites.csv		21.42 KB	text/csv
trend_values.csv		925.23 KB	text/csv
flow trends.xml Original FGDC Metadata	View	38.9 KB	application/fgdc+xml

Purpose

Data were analyzed to determine the magnitude of trends that can be attributed to climate variation at reference streamgages. This information will be used to gain insight into the importance of climate variation on streamflow modification and potential impacts on aquatic ecosystems. In addition, the datasets are foundational to the larger work cited in the metadata.

Trends in selected streamflow metrics at reference streamgages in the conterminous United States, 1955-2014

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