Amy M. Russell
Thomas M. Over
William H. Farmer
2018
Selected basin characteristics for all GAGES-II CONUS reference gages
Excel spreadsheets
Urbana, IL
U.S. Geological Survey
https://doi.org/10.5066/F70G3JC4
Thomas M. Over
William H. Farmer
Amy M. Russell
2018
Refinement of a Regression-Based Method for Prediction of Flow-Duration Curves of Daily Streamflow in the Conterminous United States
publication
n/a
US Geological Survey
http://doi.org/10.3133/sir20185072
This dataset contains selected basin characteristics from the GAGES-II dataset (https://water.usgs.gov/lookup/getspatial?gagesII_Sept2011) that were considered for use in regression equations for predicting flow-duration curves as well as additional variables that were constructed or derived from these basin characteristics. Descriptions of basin characteristics used in regression equations are provided (BCdescriptions.xlsx). Additional processing of the selected basin characteristics was done on a region-by-region basis, including deletion of variables with a large (greater than 50%) fraction of the same value (usually zero). A table indicating the basin characteristics considered for use in regression equations for each study region is provided (BCs_byRegion.xlsx). After transformation to reduce skewness and to convert to a similar range of values, these basin characteristics were used to fit regression equations for predicting FDCs. Basin characteristic selection and transformation were performed separately for each study region using all the USGS streamgages that were identified as being of “reference” quality in the GAGES-II dataset. Of the reference quality streamgages, only those having at least 10 complete water years (WYs) during the study period from WY1981 through WY2013 were used in regression model building; these are identified in the dataset. The basin characteristics are presented in their original units (unstransfBCs.new.xlsx) and as transformed (transfBCs.new.xlsx); a table specifying the transformations is provided (tranfBC_info.new.xlsx). Methods are fully described by Over and others (in review).
Datasets were used to investigate refinements of a regression-based method for prediction of flow-duration curves for selected streamgages in the conterminous United States.
1980
2013
ground condition
None planned
-125.59570312358
-65.478515625979
49.353470715064
24.166402900476
None
streamflow
flow-duration curves
regression analysis
USGS Metadata Identifier
USGS:5a4e9bcbe4b0d05ee8c6643f
None
Conterminous United States
none
none
Amy M Russell
MIDWEST REGION
Mailing and Physical
405 N. Goodwin Avenue
Urbana
IL
61801
United States
217-328-9773
arussell@usgs.gov
No formal attribute accuracy tests were conducted
No formal logical accuracy tests were conducted
Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
No formal positional accuracy tests were conducted
No formal positional accuracy tests were conducted
The process used to create the final dataset is fully described in the accompanying report (Over and others, 2018).
2017
BCdescriptions.xlsx - Worksheet 'BC_descriptions'
Descriptions of basin characteristics used in regression equations
Producer defined
Variable_Name
Variable names used in regression equations
Producer defined
Variable names used in regression equations
Description
A description of the basin characteristic used in the regression equations with data source identified if applicable. References for all cited data sources are provided on the second worksheet, BC_references.
Producer defined
A description of the basin characteristic used in the regression equations with data source identified if applicable.
Variable_Use
An identifier that specifies how the basin characteristic was used in regression equations
Producer defined
direct
basin characteristic used directly in regression equations
Producer defined
indirect
basin characteristic not used directly in regression equations but in constructed variables
producer defined
constructed
basin characteristic constructed from other GAGES-II basin characteristics
Producer defined
BCdescriptions.xlsx - Worksheet 'BC_references'
References for all data sources cited in the descriptions of basin characteristics used in regression equations. References obtained from GAGES-II dataset (https://water.usgs.gov/lookup/getspatial?gagesII_Sept2011).
Producer defined
Citation
Citation included in the descriptions of basin characteristics used in regression equations, found in the first worksheet, BC_descriptions.
Producer defined
Citation included in the descriptions of basin characteristics used in regression equations
Reference
References for cited data sources as obtained from the GAGES-II dataset
References obtained from gagesII_sept30_2011-report.docx distributed within basinchar_and_report_sept_2011.zip at (https://water.usgs.gov/lookup/getspatial?gagesII_Sept2011)
References for cited data sources as obtained from the GAGES-II dataset
BCs_byRegion.xlsx
A table indicating the basin characteristics considered for use in regression equations for each study region
Producer defined
Basin Characteristic
Basin characteristics used in regression equations
Producer defined
A description of the basin characteristic used in the regression equations with data source identified if applicable.
Beginning with column 2: Headings correspond to study region
An indication whether the specified basin characteristic was used in regression equations in the corresponding study region
Producer defined
X
True
Producer defined
untransfBCs.new.xlsx - contains a separate worksheet for each study region
Basin characteristics provided in their original units. Worksheets are named according to the GAGES-II HUC02 study region.
Producer defined
StnID
Unique USGS streamgage identification number
U.S. Geological Survey - National Water Information System
U.S. Geological Survey Site Number
National Water Information System (NWIS) database
CLASS
Reference/non-reference class: REF = reference (least-disturbed hydrologic condition); NON-REF = not reference
Reference or non-reference designation according to GAGES-II dataset
REF
REF = reference (least-disturbed hydrologic condition)
GAGES-II dataset
UsedInFDCStudy
A logical expression indicating whether the specified streamgage and its associated basin characteristics were used in this study
Producer defined
TRUE
True
Producer defined
FALSE
False
Producer defined
All remaining columns correspond to basin characteristics described in BCdescriptions.xlsx
Basin characteristic values for the specified streamgage in their original units
Producer defined
-9999
25791
as specified in column headings
transfBC_info.new.xlsx - contains a separate worksheet for each study region
A table specifying transformations made to basin characteristics prior to use in regression equations
Producer defined
BC
Basin characteristic
Producer defined
BC variable names used in regression equations
transfBCs.added
First step: constant added to basin characteristics prior to transformation
Producer defined
-871.7
9999
not applicable
transfBCs.tran
Second step: transformation applied to basin characteristics
Producer defined
center
variable not transformed
Producer defined
3over2
variable transformed by raising it to the power of (3/2)
Producer defined
2over3
variable transformed by raising it to the power of (2/3)
Producer defined
1over2
variable transformed by raising it to the power of (1/2)
Producer defined
1over3
variable transformed by raising it to the power of (1/3)
Producer defined
1over5
variable transformed by raising it to the power of (1/5)
Producer defined
1over10
variable transformed by raising it to the power of (1/10)
Producer defined
log10
variable transformed using common logarithm (base10)
Producer defined
power2
variable transformed by raising it to the power of (2)
Producer defined
power10
variable transformed by raising it to the power of (10)
Producer defined
power3
variable transformed by raising it to the power of (3)
Producer defined
power5
variable transformed by raising it to the power of (5)
Producer defined
exp10
variable transformed by using variable as exponent of 10
Producer defined
post.transfBCs.added
Third step: constant added to variables after transformation
Producer defined
-94.99744297
1.030426933
not applicable
finalBCs.divisor
Final step: constant which the variables are divided by
Producer defined
5.90E-06
1.00E+60
not applicable
transfBCs.new.xlsx - contains a separate worksheet for each study region
Basin characteristics provided in transformed units. Worksheets are named according to the GAGES-II HUC02 study region.
Producer defined
StnID
Unique USGS streamgage identification number
U.S. Geological Survey - National Water Information System
U.S. Geological Survey Site Number
National Water Information System (NWIS) database
CLASS
Reference/non-reference class: REF = reference (least-disturbed hydrologic condition); NON-REF = not reference
Reference or non-reference designation according to GAGES-II dataset
REF
REF = reference (least-disturbed hydrologic condition)
GAGES-II dataset
UsedInFDCStudy
A logical expression indicating whether the specified streamgage and its associated basin characteristics were used in this study
Producer defined
TRUE
True
Producer defined
FALSE
False
Producer defined
All remaining columns correspond to basin characteristics described in BCdescriptions.xlsx
Basin characteristic values for the specified streamgage in their transformed units
Producer defined
-1
1
as specified in column headings
GS ScienceBase
U.S. Geological Survey
Mailing and Physical
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
United States
1-888-275-8747
sciencebase@usgs.gov
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
20200814
Amy M Russell
MIDWEST REGION
Mailing and Physical
405 N. Goodwin Avenue
Urbana
IL
61801
United States
217-328-9773
arussell@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998