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  4. Assessment of hydrologic alteration at 12-digit hydrologic unit code (HUC12) pour points in the southeastern United States, 1950 - 2009

Assessment of hydrologic alteration at 12-digit hydrologic unit code (HUC12) pour points in the southeastern United States, 1950 - 2009

Dates

Publication Date
Start Date
1950-01-01
End Date
2009-12-31

Citation

Crowley-Ornelas, E.R., and Roland II, V.L., 2023, Assessment of hydrologic alteration at 12-digit hydrologic unit code (HUC12) pour points in the southeastern United States, 1950 - 2009: U.S. Geological Survey data release, https://doi.org/10.5066/P93TLFWJ.

Summary

Two methods of calculating hydrologic alteration were applied to modeled daily streamflow data for 9,201 12-digit hydrologic unit code (HUC12) pour points draining to the Gulf of Mexico (Robinson and others, 2020). The first method is a new modified method of calculating ecosurplus and ecodeficit called hydro change. For this project, ecosurplus and ecodeficit have been combined to assess overall hydrologic regime change. The second method is the confidence interval hypothesis test (Kroll and others, 2015). The first method is a means of quantifying hydrologic alteration while the second is a hypothesis test to simply determine if statistically significant alteration has occurred. Both methods are employed to determine which is the [...]

Contacts

Point of Contact :
Elena R Crowley-Ornelas
Originator :
Elena R Crowley-Ornelas, Victor L Roland
Metadata Contact :
Elena R Crowley-Ornelas, Lower Mississippi-Gulf Water Science Center
Publisher :
U.S. Geological Survey
Funding Agency :
Gulf Coast Ecosystem Restoration Council (RESTORE)
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Water Resources
SDC Data Owner :
Lower Mississippi-Gulf Water Science Center

Attached Files

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Assessment of hydrologic alteration at HUC12 pour points in the southeastern United States 1950-2009.xml
Original FGDC Metadata
View 		30.69 KB application/fgdc+xml
hydro_change.csv
“Hydrologic change analysis results” 		16.33 MB text/csv
confidence_interval_test.csv
“Confidence interval test p-value results” 		232.84 KB text/csv
hydrologic_alteration_pourpoints.zip
“Shapefile of study area HUC12 pour points” 		397.43 KB application/zip

Purpose

The purpose of this dataset is to present the results of the hydrologic alteration analysis conducted as part of a larger effort to assess long-term hydrologic change in rivers that flow to the Gulf of Mexico.

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ScienceBase WMS

Communities

  • USGS Data Release Products
  • USGS Lower Mississippi-Gulf Water Science Center

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Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P93TLFWJ

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