Elise E. Wright, Valerie A. L. Bright, Robert W. Black, and Alexander O. Headman
20231116
Output vulnerability and vulnerability difference data from logistic mapping at the conceptual well locations for a study of groundwater vulnerability to elevated nitrates in the Puget Sound Basin, Washington, 2000–19
tabular digital data
Suggested citation: Wright, E.E., Bright, V., Headman, A., and Black, R.W., 2022, Index of vulnerability for elevated nitrates in groundwater in the Puget Sound Basin, Washington, 2000–2019: U.S. Geological Survey data release, https://doi.org/10.5066/P9TOWGYM.
https://doi.org/10.5066/P9TOWGYM
Robert W. Black, Elise E. Wright, Valerie A. L. Bright, and Alexander O. Headman
2023
Prediction of the probability of elevated nitrate concentrations at groundwater depths used for drinking-water supply in the Puget Sound basin, Washington, 2004–19
publication
https://doi.org/10.3133/sir20235117
This archive contains the logistic mapping output data at the conceptual well locations. Data are provided in spreadsheets containing the estimated probabilities of nitrate concentrations greater than 2 milligrams per liter at hypothetical 150 feet and 300 feet deep wells for each of the five-year categories from 2000 to 2019 and vulnerability differences between five-year categories when one or both of the predicted probabilities was equal to or greater than 50 percent.
These data were collected for the study titled "Index of Vulnerability for Elevated Nitrates in Groundwater in the Puget Sound, Washington."
The data were output from a logistic regression model to estimate groundwater vulnerability to elevated nitrate concentrations in the Puget Sound Basin, Washington, for five-year intervals from 2000–19.
20000101
20191231
ground condition
None planned
-124.8370
-120.6466
49.0175
46.5796
ISO 19115 Topic Category
environment
health
None
Groundwater
Wells
Drinking Water
USGS Metadata Identifier
USGS:621687b4d34e4465d409153c
None
Puget Sound
Washington
None. Please see 'Distribution Info' for details.
None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations.
Robert Black
U.S. Geological Survey
Hydrologist
mailing and physical
934 Broadway
Tacoma
WA
98402
USA
253-552-1687
253-552-1581
rwblack@usgs.gov
This project was completed in cooperation with the Puget Sound Partnership. Existing data from Group A wells from the Washington State Department of Health Sentry database were used to develop a groundwater vulnerability logistic regression model.
This work was completed using a Windows operating system with ArcGIS Pro, Microsoft Excel, and R.
No formal accuracy tests were conducted.
No formal 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 accuracy tests were conducted.
No formal accuracy tests were conducted.
Logistic regression was used to estimate the probability of elevated nitrate concentrations at conceptual well locations within the study area. Additional details about this process can be found in the publication associated with this data release.
2021
Robert Black
U.S. Geological Survey
Hydrologist
mailing and physical
934 Broadway
Tacoma
WA
98402
USA
253-552-1687
253-552-1581
rwblack@usgs.gov
Universal Transverse Mercator
10
0.9996
-123.0
0.0
500000.0
0.0
coordinate pair
0.6096
0.6096
meters
North_American_Datum_1983
GRS_1980
6378137.0
298.257222101
Vulnerability_2000to2004.csv
Comma Separated Value (CSV) file containing vulnerability data for the five-year period 2000-2004.
Producer Defined
WellName
Conceptual well location ID
Producer Defined
Name to identify a conceptual well location.
Xcoord
X coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
365649.1066
672149.1066
Ycoord
Y coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
5160899.49
5429399.49
Prob_grt2mgL_at150ft
Probability of exceeding nitrate concentrations of 2 milligrams per liter in 150-foot-deep wells between 2000 and 2004.
Producer Defined
-9999
No Data. Not enough input data for logistic mapping.
Producer defined
0
87.24
percent
Prob_grt2mgL_at300ft
Probability of exceeding nitrate concentrations of 2 milligrams per liter in 300-foot-deep wells between 2000 and 2004.
Producer Defined
-9999
No Data. Not enough input data for logistic mapping.
Producer defined
0
66.7
percent
Ksat_estimated
This value identifies whether or not there is an estimated saturated hydraulic conductivity value at the conceptual well location.
Producer Defined
NO
There is no Ksat value estimated at this conceptual well location.
Producer defined
YES
There is a Ksat value estimated at this conceptual well location.
Producer defined
Vulnerability_2005to2009.csv
Comma Separated Value (CSV) file containing vulnerability data for the five-year period 2005-2009.
Producer Defined
WellName
Conceptual well location ID
Producer Defined
Name to identify a conceptual well location.
Xcoord
X coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
365649.1066
672149.1066
Ycoord
Y coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
5160899.49
5429399.49
Prob_grt2mgL_at150ft
Probability of exceeding nitrate concentrations of 2 milligrams per liter in 150-foot-deep wells between 2005 and 2009.
Producer Defined
-9999
No Data. Not enough input data for logistic mapping.
Producer defined
0
95.82
percent
Prob_grt2mgL_at300ft
Probability of exceeding nitrate concentrations of 2 milligrams per liter in 300-foot-deep wells between 2005 and 2009.
Producer Defined
-9999
No Data. Not enough input data for logistic mapping.
Producer defined
0
87.23
percent
Missing_prcp
This value identifies whether or not a precipitation value is missing at the conceptual well location.
Producer Defined
YES
There is no precipitation value at the conceptual well location.
Producer defined
NO
There is a precipitation value at the conceptual well location.
Producer defined
Vulnerability_2010to2014.csv
Comma Separated Value (CSV) file containing vulnerability data for the five-year period 2010-2014.
Producer Defined
WellName
Conceptual well location ID
Producer Defined
Name to identify a conceptual well location.
Xcoord
X coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
365649.1066
672149.1066
Ycoord
Y coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
5160899.49
5429399.49
Prob_grt2mgL_at150ft
Probability of exceeding nitrate concentrations of 2 milligrams per liter in 150-foot-deep wells between 2010 and 2014.
Producer Defined
-9999
No Data. Not enough input data for logistic mapping.
Producer defined
0
94.20
percent
Prob_grt2mgL_at300ft
Probability of exceeding nitrate concentrations of 2 milligrams per liter in 300-foot-deep wells between 2010 and 2014.
Producer Defined
-9999
No Data. Not enough input data for logistic mapping.
Producer defined
0
84.03
percent
Ksat_estimated
This value identifies whether or not there is an estimated saturated hydraulic conductivity value at the conceptual well location.
Producer Defined
NO
There is no Ksat value estimated at this conceptual well location.
Producer defined
YES
There is a Ksat value estimated at this conceptual well location.
Producer defined
Vulnerability_2015to2019.csv
Comma Separated Value (CSV) file containing vulnerability data for the five-year period 2015-2019.
Producer Defined
WellName
Conceptual well location ID
Producer Defined
Name to identify a conceptual well location.
Xcoord
X coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
365649.1066
672149.1066
Ycoord
Y coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
5160899.49
5429399.49
Prob_grt2mgL_at150ft
Probability of exceeding nitrate concentrations of 2 milligrams per liter in 150-foot-deep wells between 2015 and 2019.
Producer Defined
-9999
No Data. Not enough input data for logistic mapping.
Producer defined
2
96.31
percent
Prob_grt2mgL_at300ft
Probability of exceeding nitrate concentrations of 2 milligrams per liter in 300-foot-deep wells between 2015 and 2019.
Producer Defined
-9999
No Data. Not enough input data for logistic mapping.
Producer defined
0
90.02
percent
Ksat_estimated
This value identifies whether or not there is an estimated saturated hydraulic conductivity value at the conceptual well location.
Producer Defined
NO
There is no Ksat value estimated at this conceptual well location.
Producer defined
YES
There is a Ksat value estimated at this conceptual well location.
Producer defined
VulnerabilityDiff_Great50pct_map.csv
Comma Separated Value (CSV) file containing vulnerability difference data.
Producer Defined
WellName
Conceptual well location name
Producer Defined
Name to identify a conceptual well location.
Xcoord
X coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
462649.1066
593149.1066
Ycoord
Y coordinate of the conceptual well in NAD 1983 UTM Zone 10N.
Producer Defined
5189899.49
5427399.49
WellDepth150ft_2000-2004_minus_2005-2009
For each hypothetical 150 foot deep well in the five-year categories 2000-2004 and 2005-2009, if one or both of the predicted probabilities was equal to or greater than 50 percent the 2005-2009 probability was subtracted from the 2000-2004 probability. A positive value indicated a reduction in the probability and a negative value indicated an increase.
Producer Defined
<< empty cell >>
No Data
Producer defined
-73.551
23.403
WellDepth150ft_2005-2009_minus_2010-2014
For each hypothetical 150 foot deep well in the five-year categories 2005-2009 and 2010-2014, if one or both of the predicted probabilities was equal to or greater than 50 percent the 2010-2014 probability was subtracted from the 2005-2009 probability. A positive value indicated a reduction in the probability and a negative value indicated an increase.
Producer Defined
<< empty cell >>
No Data
Producer defined
-55.502
50.926
WellDepth150ft_2010-2014_minus_2015-2019
For each hypothetical 150 foot deep well in the five-year categories 2010-2014 and 2015-2019, if one or both of the predicted probabilities was equal to or greater than 50 percent the 2015-2019 probability was subtracted from the 2010-2014 probability. A positive value indicated a reduction in the probability and a negative value indicated an increase.
Producer Defined
<< empty cell >>
No Data
Producer defined
-28.084
12.958
WellDepth300ft_2000-2004_minus_2005-2009
For each hypothetical 300 foot deep well in the five-year categories 2000-2004 and 2005-2009, if one or both of the predicted probabilities was equal to or greater than 50 percent the 2005-2009 probability was subtracted from the 2000-2004 probability. A positive value indicated a reduction in the probability and a negative value indicated an increase.
Producer Defined
<< empty cell >>
No Data
Producer defined
-63.622
-7.823
WellDepth300ft_2005-2009_minus_2010-2014
For each hypothetical 300 foot deep well in the five-year categories 2005-2009 and 2010-2014, if one or both of the predicted probabilities was equal to or greater than 50 percent the 2010-2014 probability was subtracted from the 2005-2009 probability. A positive value indicated a reduction in the probability and a negative value indicated an increase.
Producer Defined
<< empty cell >>
No Data
Producer defined
-12.821
45.433
WellDepth300ft_2010-2014_minus_2015-2019
For each hypothetical 300 foot deep well in the five-year categories 2010-2014 and 2015-2019, if one or both of the predicted probabilities was equal to or greater than 50 percent the 2015-2019 probability was subtracted from the 2010-2014 probability. A positive value indicated a reduction in the probability and a negative value indicated an increase.
Producer Defined
<< empty cell >>
No Data
Producer defined
-28.498
0.134
GS ScienceBase
U.S. Geological Survey
mailing address
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 on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
Digital Data
https://doi.org/10.5066/P9TOWGYM
None
20240802
Elise E. Wright
USGS
mailing
934 Broadway
Tacoma
WA
98402
USA
253-552-1672
253-552-1581
eewright@usgs.gov
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998