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HF028: Water stable isotopes for streams and precipitation samples in the HJ Andrews Experimental Forest, 2014-2023

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Status: asNeeded
Period: 2014-11-11 to 2023-05-28
Version: 6
Published: 2025-10-02
EDI Package ID: knb-lter-and.5489.6
Source XML: HF028_6.xml

Notice

"As Is" Basis: All content, including maps and forecasts, is provided without warranties. Users are advised to independently verify critical information.

Citation

Segura, C.; Perry, Z.; Ortega, J. 2025. Water stable isotopes for streams and precipitation samples in the HJ Andrews Experimental Forest, 2014-2023 Long-Term Ecological Research Andrews Forest LTER Site. [Database]. Available: https://andrewsforest-stage.forestry.oregonstate.edu/data/fsdb-data-catalog/HF028 Accessed 2026-05-10.

Abstract

Water samples have been collected for analysis of water stable isotopes (O18/16 and H2/H1) at different locations in the HJ Andrews Experimental Forest and over different periods since 2014 in the HJ Andrews Experimental Forest. The database includes: 1) grab samples collected over the stream network of the Andrews Forest on multiple sampling campaigns during various flow conditions. In each of the campaigns, the samples were collected at approximately 50–100-meter intervals in 1st–5th order streams across the network; 2) water samples collected in the Andrews Forest every 1–3 weeks between 2014 and 2018 in streams (Lookout Creek, Mack Creek, McRae Creek, WS01, WS02, WS07, and WS08) and bulk precipitation from benchmark meteorological stations (PRIMET, MACK, and H15MET) between 2014 and 2023; 3) stream and precipitation samples collected in the Andrews Forest at high temporal resolution during discrete storm events at Mack Creek in 2015; and 4) weekly grab samples from Lookout Creek and selected tributaries.

Coverage

Temporal coverage: 2014-11-11 to 2023-05-28

Geographic coverage: Hydrologic systems in the Andrews Forest

Spatial coverage:

Bounds: W -122.26172200, E -122.10084700, N 44.28196400, S 44.19770400

Purpose
  • The objective of this data is to characterize the isotopic signature of water in the Andrews Forest ro investigate and model rainfall-runoff generation process at different temporal and spatial scales.
Project

Title: Long-Term Ecological Research

Personnel
Abstract
  • The H.J. Andrews Experimental Forest is a living laboratory that provides unparalleled opportunities for the study of forest and stream ecosystems in the central Cascade Range of Oregon. Since 1980, as a part of the National Science Foundation Long Term Ecological Research (NSF-LTER) program, the Andrews Experimental Forest has become a leader in the analysis of forest and stream ecosystem dynamics.
  • Long-term field experiments and measurement programs have focused on climate dynamics, streamflow, water quality, and vegetation succession. Currently researchers are working to develop concepts and tools needed to predict effects of natural disturbance, land use, and climate change on ecosystem structure, function, and species composition.
  • The Andrews Experimental Forest is administered cooperatively by the USDA Forest Service Pacific Northwest Research Station, Oregon State University and the Willamette National Forest. Funding for the research program comes from the National Science Foundation (NSF), US Forest Service Pacific Northwest Research Station, Oregon State University, and other sources.
Funding

Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 2025755), US Forest Service Pacific Northwest Research Station, and Oregon State University. National Science Foundation: DEB2025755

Awards
Study Area Description
  • Long-Term Ecological Research
    The Andrews Forest is situated in the western Cascade Range of Oregon, and covers the entire 15,800-acre (6400-ha) drainage basin of Lookout Creek. Elevation ranges from 1350 to 5340 feet (410 to 1630 m). Broadly representative of the rugged mountainous landscape of the Pacific Northwest, the Andrews Forest contains excellent examples of the region's conifer forests and associated wildlife and stream ecosystems. These forests are among the tallest and most productive in the world, with tree heights of often greater than 250 ft (75 m). Streams are steep, cold and clean, providing habitat for numerous aquatic organisms.
Associated Party
  • Catalina Segura
    Role: Principal Investigator
    Assistant Professor; Department of Forest Engineering, Resources, and Management; Oregon State University, Corvallis, OR, 97331
    Phone: 541-737-6568
    Email: catalina.segura@oregonstate.edu
  • Zachary Perry
    Role: Other Researcher
    Email: zachary.perry@oregonstate.edu
  • Jaimie Ortega
    Role: Other Researcher
    Email: jaime.ortega@oregonstate.edu
  • David Noone
    Role: Other Researcher
    The University of Auckland
    Email: david.noone@auckland.ac.nz
  • Julia A. Jones
    Role: Other Researcher
    Oregon State University;Department of Geosciences; Wilkinson Hall 104, Corvallis, OR, 97331-5506, USA
    Phone: (541) 737-1224
    Email: Julia.Jones@oregonstate.edu, geojulia@comcast.net
  • Dana Richard Warren
    Role: Other Researcher
    Nash Hall, Oregon State University, Corvallis, OR, 97330, USA
    Phone: 541-737-5319
    Email: dana.warren@oregonstate.edu
  • J. Renée Brooks
    Role: Other Researcher
    Western Ecology Division;U.S. EPA/NHEERL;200 SW 35th St.;, Corvallis, OR, 97333, USA
    Phone: (541) 754-4684
    Email: J.Renee.Brooks@oregonstate.edu
  • Catalina Segura
    Role: Creator
    Assistant Professor; Department of Forest Engineering, Resources, and Management; Oregon State University, Corvallis, OR, 97331
    Phone: 541-737-6568
    Email: catalina.segura@oregonstate.edu
  • Zachary Perry
    Role: Creator
    Email: zachary.perry@oregonstate.edu
  • Jaimie Ortega
    Role: Creator
    Email: jaime.ortega@oregonstate.edu
  • Pamela L. Sullivan
    Role: Other Researcher
    Email: Pamela.Sullivan@oregonstate.edu
Contact
  • Information Manager
    Andrews Forest LTER Program, US Forest Service Pacific Northwest Research Station, 3200 SW Jefferson Way, Corvallis, OR, 97331
    Email: hjaweb@lists.oregonstate.edu
  • Catalina Segura
    Assistant Professor; Department of Forest Engineering, Resources, and Management; Oregon State University, Corvallis, OR, 97331
    Phone: 541-737-6568
    Email: catalina.segura@oregonstate.edu
Publisher
  • Andrews Forest LTER Site
    Role: Publisher
    Forest Ecosystems and Society Department in Forestry, Oregon State University, 201K Richardson Hall, Corvallis, OR, 97331-5752
    Phone: (541) 737-8480
    Email: lterweb@lists.oregonstate.edu
Study Description

Water samples have been collected for analysis of water stable isotopes (O18/16 and H2/H1) at different locations in the HJ Andrews Experimental Forest and over different periods since 2014 in the HJ Andrews Experimental Forest. The database includes: 1) grab samples collected over the stream network of the Andrews Forest on multiple sampling campaigns during various flow conditions. In each of the campaigns, the samples were collected at approximately 50–100-meter intervals in 1st–5th order streams across the network; 2) water samples collected in the Andrews Forest every 1–3 weeks between 2014 and 2018 in streams (Lookout Creek, Mack Creek, McRae Creek, WS01, WS02, WS07, and WS08) and bulk precipitation from benchmark meteorological stations (PRIMET, MACK, and H15MET) between 2014 and 2023; 3) stream and precipitation samples collected in the Andrews Forest at high temporal resolution during discrete storm events at Mack Creek in 2015; and 4) weekly grab samples from Lookout Creek and selected tributaries. The objective of this data is to characterize the isotopic signature of water in the Andrews Forest ro investigate and model rainfall-runoff generation process at different temporal and spatial scales. Field Methods - HF028

Purpose: The objective of this data is to characterize the isotopic signature of water in the Andrews Forest ro investigate and model rainfall-runoff generation process at different temporal and spatial scales.

Methods

Method Steps

Field Methods - HF028
  • Synoptic grab water samples were collected during multiple campaigns: July-September 2015, June 2016, September 2016, August 2021, and May-November 2022 including locations over a wide range of streams spanning 1st to 5th orders. Locations were at ~50- 100-meter intervals recorded using Gain 30x GPS unit.
  • Stream samples were collected every 3 weeks between 2014 and 2018 at Lookout, Mack and McRae Creeks and at WS01, WS02, WS07, and WS08. Bulk precipitation was collected every week (PRIMET) and every 3 weeks (H15MET) over the same period, and sampling at PRIMET continued to 2023.
  • Forty-four, streamflow grab samples were collected at Mack Creek every 4 hours using an automatic autosampler (ISCO-3700). Precipitation was sequentially sampled at the PRIMET benchmark station using a sequential rainfall sampler designed to collect up to 12, 200-mL water samples to characterize the temporal variability of water stable isotopes.
  • The weekly grab samples collected in Lookout Creek and selected tributaries were collected at 10 sites between May 2022-April 2023. Some sites were added mid-study, so some data was collected over a shorter time frame. An attempt was made to sample each location every week, but some samples may be absent due to field conditions.
  • All water samples for isotopic analysis were collected and stored in 20-mL glass bottles with conical inserts without headspace and kept in dark at relatively cool conditions (less than 15°C) to avoid fractionation by evaporation until their analysis was conducted at the Watershed Processes Laboratory at Oregon State University.
Laboratory Methods - HF028
  • The water stable isotope ratios were analyzed in the watershed processes laboratory in the College of Forestry (Oregon State University) using a cavity ring down spectroscopy liquid and vapor isotopic measurement analyzer (Picarro L2130-i, Picarro Inc, CA). Two internal standards were used to develop calibration equations, and a third standard was used to assess external accuracy. All the standards were calibrated against the IAEA primary standards for Vienna Standard Mean Ocean Water, Standard Light Antarctic Precipitation (SLAP), and Greenland Ice Sheet Precipitation.

Sampling

Study Extent
  • Sampling frequency: Variable from hourly to sub monthly
Sampling Description
  • The 2015-2016 synoptic water stable isotope values were collected to compare summer baseflow water sources between 2 years with contrasting hydrologic conditions: 2015 was a year that lacked snowpack and had very low flow conditions and 2016 that had average incoming precipitation. The samples were collected roughly in the same stream network over 3 sampling campaigns in the 2nd to 5th order steams of Lookout, Mack, McRae, and Cold Creeks.
  • The synoptic water stable isotope values (2021, 2022) were collected to compare Summer baseflow water sources to water sources during wet months in the Fall and Spring. Sampling during these campaigns spanned smaller headwater streams to elucidate the influence of physiographic metrics on the spatial distribution of isotope data.
  • Samples collected every 3 weeks at selected locations targeted streams draining a broad range of drainage areas over contrasting geologic and geomorphologic conditions. Precipitation samples collected at three locations provide information about the water inputs to the Andrews Forest.
  • High frequency storm samples were collected at Mack Creek in order to investigate the performance of a flow partitioning tracer-based hydrological model calibrated using water stable isotopes and electrical conductivity.
  • The weekly stream samples (May 2022- May 2023) were collected from multiple locations along the main tributaries and selected headwater streams of the Lookout Creek watershed to investigate the spatiotemporal streamflow contributions of those selected watersheds, which have different basin sizes (drainage area) and elevations gradients.
Spatial Sampling Units
  • Andrews Experimental Forest (HJA)
    W -122.26172200, E -122.10084700, N 44.28196400, S 44.19770400
    Altitude: 1631 to 1631 meter
  • Mack Creek
    W -122.16826200, E -122.14698900, N 44.22714600, S 44.20991900
  • Cold Creek
    W -122.12735800, E -122.11082800, N 44.23442340, S 44.22821100
    Altitude: 1341 to 1341 meter
  • McRae Creek
    W -122.20859020, E -122.13943300, N 44.27311600, S 44.23328700
  • Andrews Watershed 1
    W -122.25683100, E -122.23581300, N 44.20851700, S 44.19901700
    Altitude: 1027 to 1027 meter
  • Andrews Watershed 2
    W -122.24397600, E -122.22974100, N 44.21338500, S 44.20617800
    Altitude: 1079 to 1079 meter
  • Andrews Watershed 7
    W -122.17920900, E -122.17387500, N 44.26974800, S 44.26457900
    Altitude: 1102 to 1102 meter
  • Andrews Watershed 8
    W -122.17079300, E -122.17079300, N 44.26629400, S 44.26588100
    Altitude: 1182 to 1182 meter
  • Primary Meteorological Station
    W -122.25594100, E -122.25594100, N 44.21189300, S 44.21189300
    Altitude: 436 to 436 meter
  • High 15 Meteorological Station
    W -122.17378247, E -122.17378247, N 44.26425069, S 44.26425069
    Altitude: 909 to 909 meter
  • Andrews Lookout Creek Watershed
    W -122.25879300, E -122.09952700, N 44.28226000, S 44.20127400
    Altitude: 1627 to 1627 meter
  • Andrews Mack Creek Watershed
    W -122.17282200, E -122.12699600, N 44.22054300, S 44.20148000
    Altitude: 1626 to 1626 meter
  • Andrews Lookout Creek Gaging Station
    W -122.25714600, E -122.25714600, N 44.21012600, S 44.21012600
    Altitude: 422 to 422 meter
  • Andrews Mack Creek Gaging Station
    W -122.16744700, E -122.16744700, N 44.21943621, S 44.21943621
    Altitude: 755 to 755 meter
  • Primary Met Station NADP Recording RG
    W -122.25578500, E -122.25578500, N 44.21192400, S 44.21192400
  • Andrews Watershed 1 Gaging Station
    W -122.25802700, E -122.25802700, N 44.20733900, S 44.20733900
    Altitude: 439 to 439 meter
  • Andrews Watershed 2 Gaging Station
    W -122.24487600, E -122.24487600, N 44.21201500, S 44.21201500
    Altitude: 545 to 545 meter
  • Andrews Watershed 7 Gaging Station
    W -122.17526500, E -122.17526500, N 44.26463700, S 44.26463700
    Altitude: 918 to 918 meter
  • Andrews Watershed 8 Gaging Station
    W -122.17079300, E -122.17079300, N 44.26629426, S 44.26629426
    Altitude: 962 to 962 meter
  • Cold Creek Synoptic Sample Sites
    W -122.12722540, E -122.12722540, N 44.22839295, S 44.22839295
  • Longer Creek Synoptic Sample Sites
    W -122.14777973, E -122.14777973, N 44.23358683, S 44.23358683
  • Lower Lookout Creek Synoptic Sample Sites
    W -122.26135510, E -122.26135510, N 44.20534312, S 44.20534312
  • Mack Creek Synoptic Sample Sites
    W -122.14793260, E -122.14793260, N 44.20991928, S 44.20991928
  • McRae Creek Synoptic Sample Sites
    W -122.20859010, E -122.20859010, N 44.23328661, S 44.23328661
  • Nostoc Creeek Synoptic Sample Sites
    W -122.17414702, E -122.17414702, N 44.23114312, S 44.23114312
  • Shorter Creek Synoptic Sample Sites
    W -122.15672020, E -122.15672020, N 44.23442799, S 44.23442799
  • Tributary No Name Synoptic Sample Sites
    W -122.11608070, E -122.11608070, N 44.21856011, S 44.21856011
  • Upper Lookout Creek Synoptic Sample Sites
    W -122.11665550, E -122.11665550, N 44.20786171, S 44.20786171
  • McRae Creek Tributary West 2 Synoptic Sample Sites
    W -122.16604530, E -122.16604530, N 44.25908852, S 44.25908852
  • Stream 2 Synoptic Sample Sites
    W -122.18352750, E -122.18352750, N 44.24957252, S 44.24957252
  • Stream 5 Synoptic Sample Sites
    W -123.40969610, E -123.40969610, N 44.05440425, S 44.05440425
  • Torrent Creek Synoptic Sample Sites
    W -122.12874290, E -122.12874290, N 44.22909088, S 44.22909088
  • Watershed 6S Synoptic Sample Sites
    W -122.17936990, E -122.17936990, N 44.25941911, S 44.25941911
  • Watershed 7S Synoptic Sample Sites
    W -122.17409970, E -122.17409970, N 44.26272126, S 44.26272126
  • Watershed 8S Synoptic Sample Sites
    W -122.17390890, E -122.17390890, N 44.26292695, S 44.26292695
  • McRae Creek Tributary West Synoptic Sample Sites
    W -122.18339958, E -122.18339958, N 44.24886036, S 44.24886036
Software

No software entries listed in this EML file.

Keywords
  • LTER controlled vocabulary: droughts (theme), tracers (theme), disturbance (theme), streamflow (theme), stable isotopes (theme), streams (theme)
  • Andrews Experimental Forest site thesaurus: water samples (theme)
  • LTER core research areas: disturbance (theme)
Taxonomic Hierarchy

No taxonomic hierarchy listed in this EML file.

Data Entities
# Entity Metadata Data
1 HF02801
Water isotopic ratios (O18/O16, H2/H1) of synoptic sampling in streams at HJA
Includes data for 1845 grab samples collected during 8 sampling campaigns between 2015 and 2023.
 METADATA DATA
2 HF02802
Water isotopic ratios (O18/O16, H2/H1) from stream and precipitation at some streams and benchmark meteorological stations at HJA
Includes grab stream samples collected submonthly at Lookout Creek, Mack Creek, McRae Creek, WS01, WS02, WS07, and WS08 and bulk precipitation samples collected at PRIMET, MACK and H15MET
 METADATA DATA
3 HF02803
High Resolution Water isotopic ratios of stream and precipitation at Mack Creek during discrete storm events
Includes high resolution (every 4 hours) stream water samples collected at Mack Creek and sequential precipitation samples collected at PRIMET during a storm event in November 2015.
 METADATA DATA
4 HF02804
Water isotopic ratios (O18/O16, H2/H1) from weekly grab samples collected in Lookout Creek and selected tributaries
Includes data from 5 sites collected weekly starting in May 2022
 METADATA DATA
Metadata
HF02801 - Water isotopic ratios (O18/O16, H2/H1) of synoptic sampling in streams at HJA

Object name: HF02801_v3.csv

Records: 1845

Attributes: 9

Temporal coverage: 2015-07-01 to 2023-05-28

File size: 151126 byte

Checksum (MD5): 94e1997865e6133144051b6de9be0397

Format: headers=1, recordDelimiter=\r\n, fieldDelimiter=,, quoteCharacter=", orientation=column

Constraints (2)
  • primaryKey: PRIMARY
    HF02801.SAMPLE_DATE, HF02801.SAMPLE_ID
  • notNullConstraint: NOTNULL
    HF02801.DBCODE, HF02801.DEL18O, HF02801.DEL2H, HF02801.ENTITY, HF02801.SAMPLE_DATE, HF02801.SAMPLE_ID, HF02801.TRIB_NAME, HF02801.UTM_E, HF02801.UTM_N
Attributes (9)
DBCODE - char(5) (nominal)

ID: HF02801.DBCODE

FSDB Database Code

Type system: Microsoft SQL Server 2019

Code definitions (1)
  • HF028
    FSDB Database Code HF028
ENTITY - numeric(2,0) (ratio)

ID: HF02801.ENTITY

Entity number

Type system: Microsoft SQL Server 2019

Unit: number

Precision: 1

Numeric domain: type=natural, min=1.0000 (exclusive=false), max=1.0000 (exclusive=false)

TRIB_NAME - char(30) (nominal)

ID: HF02801.TRIB_NAME

Stream name of sample location

Type system: Microsoft SQL Server 2019

Code definitions (19)
  • GSMACK
    Andrews Mack Creek Gaging Station
  • GSLOOK
    Andrews Lookout Creek Gaging Station
  • Cold Creek
    Cold Creek Synoptic Sample Sites
  • Longer Creek
    Longer Creek Synoptic Sample Sites
  • Lower Lookout
    Lower Lookout Creek Synoptic Sample Sites
  • Mack Creek
    Mack Creek Synoptic Sample Sites
  • McRae Creek
    McRae Creek Synoptic Sample Sites
  • Nostoc Creek
    Nostoc Creeek Synoptic Sample Sites
  • Shorter Creek
    Shorter Creek Synoptic Sample Sites
  • Tributary No Name
    Tributary No Name Synoptic Sample Sites
  • Upper Lookout
    Upper Lookout Creek Synoptic Sample Sites
  • McRae Creek west tributary
    McRae Creek Tributary West Synoptic Sample Sites
  • McRae Creek west tributary 2
    McRae Creek Tributary West 2 Synoptic Sample Sites
  • Stream 2
    Stream 2 Synoptic Sample Sites
  • Stream 5
    Stream 5 Synoptic Sample Sites
  • Torrent Creek
    Torrent Creek Synoptic Sample Sites
  • Watershed 6S
    Watershed 6S Synoptic Sample Sites
  • Watershed 7S
    Watershed 7S Synoptic Sample Sites
  • Watershed 8S
    Watershed 8S Synoptic Sample Sites
SAMPLE_ID - char(10) (nominal)

ID: HF02801.SAMPLE_ID

Site code for the sampling location

Type system: Microsoft SQL Server 2019

SAMPLE_DATE - datetime (dateTime)

ID: HF02801.SAMPLE_DATE

Date of sample collection

Type system: Microsoft SQL Server 2019

Date format: YYYY-MM-DD

DEL18O - numeric(7,3) (ratio)

ID: HF02801.DEL18O

Oxygen-18 (O18/O16) as compared to the Vienna Standard Mean Ocean Water (VSMOW)

Type system: Microsoft SQL Server 2019

Unit: permil

Precision: 0.210000

Numeric domain: type=real, min=-11.7830 (exclusive=false), max=-10.2210 (exclusive=false)

DEL2H - numeric(7,3) (ratio)

ID: HF02801.DEL2H

Deuterium (H2/H1) as compared to the Vienna Standard Mean Ocean Water (VSMOW)

Type system: Microsoft SQL Server 2019

Unit: permil

Precision: 0.060000

Numeric domain: type=real, min=-80.7690 (exclusive=false), max=-70.2860 (exclusive=false)

UTM_N - numeric(10,2) (ratio)

ID: HF02801.UTM_N

Latitude North (datum: NAD_1983_UTM_Zone_10N)

Type system: Microsoft SQL Server 2019

Unit: meters

Precision: 1

Numeric domain: type=real, min=4894945.5000 (exclusive=false), max=4902568.0200 (exclusive=false)

UTM_E - numeric(9,2) (ratio)

ID: HF02801.UTM_E

Longitude East (datum: NAD_1983_UTM_Zone_10N)

Type system: Microsoft SQL Server 2019

Unit: meters

Precision: 1

Numeric domain: type=real, min=559015.6200 (exclusive=false), max=570920.8800 (exclusive=false)

HF02802 - Water isotopic ratios (O18/O16, H2/H1) from stream and precipitation at some streams and benchmark meteorological stations at HJA

Object name: HF02802_v3.csv

Records: 1000

Attributes: 7

Temporal coverage: 2014-11-11 to 2020-12-29

File size: 48559 byte

Checksum (MD5): 263d193b085b1608effcbbfc5da2a816

Format: headers=1, recordDelimiter=\r\n, fieldDelimiter=,, quoteCharacter=", orientation=column

Constraints (2)
  • primaryKey: PRIMARY
    HF02802.SAMPLE_DATE, HF02802.SITECODE, HF02802.TYPE
  • notNullConstraint: NOTNULL
    HF02802.DBCODE, HF02802.DEL18O, HF02802.DEL2H, HF02802.ENTITY, HF02802.SAMPLE_DATE, HF02802.SITECODE, HF02802.TYPE
Attributes (7)
DBCODE - char(5) (nominal)

ID: HF02802.DBCODE

FSDB Database Code

Type system: Microsoft SQL Server 2019

Code definitions (1)
  • HF028
    FSDB Database Code HF028
ENTITY - numeric(2,0) (ratio)

ID: HF02802.ENTITY

Entity number

Type system: Microsoft SQL Server 2019

Unit: number

Precision: 1

Numeric domain: type=natural, min=2.0000 (exclusive=false), max=2.0000 (exclusive=false)

SITECODE - char(8) (nominal)

ID: HF02802.SITECODE

Site code for the sampling location

Type system: Microsoft SQL Server 2019

Code definitions (9)
  • MCRAE
    McRae Creek
  • GSWS01
    Andrews Watershed 1 Gaging Station
  • GSWS02
    Andrews Watershed 2 Gaging Station
  • GSWS07
    Andrews Watershed 7 Gaging Station
  • GSWS08
    Andrews Watershed 8 Gaging Station
  • GSMACK
    Andrews Mack Creek Gaging Station
  • GSLOOK
    Andrews Lookout Creek Gaging Station
  • H15MET
    High 15 Meteorological Station
  • PRIMET
    Primary Met Station NADP Recording RG
TYPE - char(4) (nominal)

ID: HF02802.TYPE

Type of sample collected

Type system: Microsoft SQL Server 2019

Code definitions (2)
  • GB
    Grab sample of surface water
  • PREC
    Bulk Precipitation
SAMPLE_DATE - datetime (dateTime)

ID: HF02802.SAMPLE_DATE

Date of sample collection

Type system: Microsoft SQL Server 2019

Date format: YYYY-MM-DD

DEL18O - numeric(7,3) (ratio)

ID: HF02802.DEL18O

Oxygen-18 (O18/O16) as compared to the Vienna Standard Mean Ocean Water (VSMOW)

Type system: Microsoft SQL Server 2019

Unit: permil

Precision: 0.210000

Numeric domain: type=real, min=-19.3340 (exclusive=false), max=3.6900 (exclusive=false)

DEL2H - numeric(7,3) (ratio)

ID: HF02802.DEL2H

Deuterium (H2/H1) as compared to the Vienna Standard Mean Ocean Water (VSMOW)

Type system: Microsoft SQL Server 2019

Unit: permil

Precision: 0.060000

Numeric domain: type=real, min=-145.2750 (exclusive=false), max=-1.9050 (exclusive=false)

HF02803 - High Resolution Water isotopic ratios of stream and precipitation at Mack Creek during discrete storm events

Object name: HF02803_v1.csv

Records: 54

Attributes: 7

Temporal coverage: 2001-05-14 to 2015-11-30

File size: 3111 byte

Checksum (MD5): 858cf8e979f78f76be51da427bee0cbb

Format: headers=1, recordDelimiter=\r\n, fieldDelimiter=,, quoteCharacter=", orientation=column

Constraints (2)
  • primaryKey: PRIMARY
    HF02803.DATETIME, HF02803.SITECODE, HF02803.TYPE
  • notNullConstraint: NOTNULL
    HF02803.DATETIME, HF02803.DBCODE, HF02803.DEL18O, HF02803.DEL2H, HF02803.ENTITY, HF02803.SITECODE, HF02803.TYPE
Attributes (7)
DBCODE - char(5) (nominal)

ID: HF02803.DBCODE

FSDB Database Code

Type system: Microsoft SQL Server 2019

Code definitions (1)
  • HF028
    FSDB Database Code HF028
ENTITY - numeric(2,0) (ratio)

ID: HF02803.ENTITY

Entity number

Type system: Microsoft SQL Server 2019

Unit: number

Precision: 1

Numeric domain: type=natural, min=3.0000 (exclusive=false), max=3.0000 (exclusive=false)

SITECODE - char(8) (nominal)

ID: HF02803.SITECODE

Site code for the sampling location

Type system: Microsoft SQL Server 2019

Code definitions (9)
  • MCRAE
    McRae Creek
  • GSWS01
    Andrews Watershed 1 Gaging Station
  • GSWS02
    Andrews Watershed 2 Gaging Station
  • GSWS07
    Andrews Watershed 7 Gaging Station
  • GSWS08
    Andrews Watershed 8 Gaging Station
  • GSMACK
    Andrews Mack Creek Gaging Station
  • GSLOOK
    Andrews Lookout Creek Gaging Station
  • H15MET
    High 15 Meteorological Station
  • PRIMET
    Primary Met Station NADP Recording RG
TYPE - char(4) (nominal)

ID: HF02803.TYPE

Type of sample collected

Type system: Microsoft SQL Server 2019

Code definitions (2)
  • GB
    Grab sample of surface water
  • PREC
    Bulk Precipitation
DATETIME - datetime (dateTime)

ID: HF02803.DATETIME

Date and time of sample collection (PST)

Type system: Microsoft SQL Server 2019

Date format: YYYY-MM-DD hh:mm:ss

DEL18O - numeric(7,3) (ratio)

ID: HF02803.DEL18O

Oxygen-18 (O18/O16) as compared to the Vienna Standard Mean Ocean Water (VSMOW)

Type system: Microsoft SQL Server 2019

Unit: permil

Precision: 0.210000

Numeric domain: type=real, min=-10.9200 (exclusive=false), max=-3.4920 (exclusive=false)

DEL2H - numeric(7,3) (ratio)

ID: HF02803.DEL2H

Deuterium (H2/H1) as compared to the Vienna Standard Mean Ocean Water (VSMOW)

Type system: Microsoft SQL Server 2019

Unit: permil

Precision: 0.060000

Numeric domain: type=real, min=-74.5570 (exclusive=false), max=-9.9920 (exclusive=false)

HF02804 - Water isotopic ratios (O18/O16, H2/H1) from weekly grab samples collected in Lookout Creek and selected tributaries

Object name: HF02804_v1.csv

Records: 277

Attributes: 7

Temporal coverage: 2022-05-06 to 2023-05-04

File size: 14767 byte

Checksum (MD5): f1492976212cfeaae66172b61fd4323a

Format: headers=1, recordDelimiter=\r\n, fieldDelimiter=,, quoteCharacter=", orientation=column

Constraints (2)
  • primaryKey: PRIMARY
    HF02804.COLLECTION_PT, HF02804.SAMPLE_DATE, HF02804.STREAM_NAME
  • notNullConstraint: NOTNULL
    HF02804.DBCODE, HF02804.ENTITY, HF02804.COLLECTION_PT, HF02804.SAMPLE_DATE, HF02804.STREAM_NAME
Attributes (7)
DBCODE - char(5) (nominal)

ID: HF02804.DBCODE

FSDB Database Code

Type system: Microsoft SQL Server 2019

Code definitions (1)
  • HF028
    FSDB Database Code HF028
ENTITY - numeric(2,0) (ratio)

ID: HF02804.ENTITY

Entity number

Type system: Microsoft SQL Server 2019

Unit: number

Precision: 1

Numeric domain: type=natural, min=4.0000 (exclusive=false), max=4.0000 (exclusive=false)

STREAM_NAME - char(30) (nominal)

ID: HF02804.STREAM_NAME

Stream name of sample location

Type system: Microsoft SQL Server 2019

Code definitions (7)
  • McRae Creek
    McRae Creek
  • GSMACK
    Andrews Mack Creek Gaging Station
  • GSLOOK
    Andrews Lookout Creek Gaging Station
  • Nostoc Creek
    Nostoc Creek
  • Longer Creek
    Longer Creek
  • Cold Creek
    Cold Creek
  • Upper Lookout
    Upper Lookout Creek
COLLECTION_PT - char(3) (nominal)

ID: HF02804.COLLECTION_PT

Collection point for the sampling location

Type system: Microsoft SQL Server 2019

Code definitions (10)
  • CC
    HF028 stream grab sample collection point at Cold Creek
  • LO2
    HF028 stream grab sample collection point 2 at Upper Lookout
  • LO1
    HF028 stream grab sample collection point 1 at Upper Lookout
  • MR
    HF028 stream grab sample collection point at McRae Creek
  • LO5
    HF028 stream grab sample collection point 5 at Upper Lookout
  • MC
    HF028 stream grab sample collection point at Mack Creek
  • LC
    HF028 stream grab sample collection point at Longer Creek
  • NC
    HF028 stream grab sample collection point at Nostoc Creek
  • LO3
    HF028 stream grab sample collection point 3 at Upper Lookout
  • LO4
    HF028 stream grab sample collection point 4 at Upper Lookout
SAMPLE_DATE - datetime (dateTime)

ID: HF02804.SAMPLE_DATE

Date of sample collection

Type system: Microsoft SQL Server 2019

Date format: YYYY-MM-DD

DEL18O - numeric(7,3) (ratio)

ID: HF02804.DEL18O

Oxygen-18 (O18/O16) as compared to the Vienna Standard Mean Ocean Water (VSMOW)

Type system: Microsoft SQL Server 2019

Unit: permil

Precision: 0.210000

Numeric domain: type=real, min=-11.7580 (exclusive=false), max=-10.0250 (exclusive=false)

DEL2H - numeric(7,3) (ratio)

ID: HF02804.DEL2H

Deuterium (H2/H1) as compared to the Vienna Standard Mean Ocean Water (VSMOW)

Type system: Microsoft SQL Server 2019

Unit: permil

Precision: 0.060000

Numeric domain: type=real, min=-80.6700 (exclusive=false), max=67.2830 (exclusive=false)

Units
meters m length meter meter 1 meter; SI unit of length
permil o/oo massPerMass permil gramPerGram 0.001 parts per thousand, relative to a standard. for isotopes. Isotope data uses LC-delta=(Rx/Rs-1)*1000
number number dimensionless number dimensionless 1 dimensionless number, i.e., ratio, count
Related Datasets

No related dataset codes found in the EML text fields.

Related Publications
  • Mosquera, Giovanny M.; Segura, Catalina; Crespo, Patricio. 2018. Flow Partitioning Modelling Using High-Resolution Isotopic and Electrical Conductivity Data. Water. 10(7),904: 1-23. doi: 10.3390/w10070904
  • Segura, Catalina; Noone, David; Warren, Dana; Jones, Julia A.; Tenny, Johnathan; Ganio, Lisa M. 2019. Climate, Landforms, and Geology Affect Baseflow Sources in a Mountain Catchment. Water Resources Research. 55(7): 5238-5254. doi: 10.1029/2018WR023551
  • Segura, Catalina. 2021. Snow drought reduces water transit times in headwater streams. Hydrological Processes. 35. 17 pp. doi: 10.1002/hyp.14437
  • Ortega, Jaime; Segura, Catalina; Brooks, J. Renée; Sullivan, Pamela L. 2025. Insights Into Heterogeneous Streamflow Generation Processes and Water Contribution in Forested Headwaters. Hydrological Processes. 39(8): e70241. doi: 10.1002/hyp.70241
  • Ortega, Jaime; Bush, Sidney A.; Segura, Catalina; Sullivan, Pamela L. 2025. Subsurface Storage Drives Hydrologic Connectivity and Spatial Variability in Stream Chemistry. Hydrological Processes. 39(8): e70228. doi: 10.1002/hyp.70228
Related Files

No related files listed in this EML file.

Intellectual Rights

Data Use Agreement:

The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. This Data Set is released under the Creative Commons license CC BY "Attribution" (see: https://creativecommons.org/licenses/by/4.0/). Creative Commons license CC BY - Attribution is a license that allows others to distribute, remix, tweak, and build upon your work (even commercially), as long as you are credited for the original creation. This license accommodates maximum dissemination and use of licensed materials.

It is considered professional conduct and an ethical obligation to acknowledge the work of other scientists. The Data User is asked to provide attribution of the original work if this data package is shared in whole or by individual parts or used in the derivation of other products. A recommended citation is provided for each Data Set in the Andrews LTER data catalog (see: http://andlter.forestry.oregonstate.edu/data/catalog/datacatalog.aspx). A generic citation is also provided for this Data Set on the website https://portal.edirepository.org in the summary metadata page. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.

While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed and all data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data.

General acknowledgement: Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 2025755), US Forest Service Pacific Northwest Research Station, and Oregon State University.

Licensed

License: Creative Commons Attribution 4.0 International Public License

Identifier: CC-BY-4.0

URL: https://creativecommons.org/licenses/by/4.0/

Maintenance

Maintenance update frequency: asNeeded

Description

  • An update history is logged and maintained with each new version of every dataset.

Change History

  • Version1 (2017-05-19)
    Study code and preliminary metadata established
  • Version2 (2018-12-20)
    Re-purposed this study code for another study. Previous assignment was a duplicate.
  • Version3 (2019-04-30)
    Created 4 new entities, QC and uploaded data.
  • Version4 (2022-07-18)
    New dataset (replacement) for entity 2, including new data for 2017 and 2018.
  • Version5 (2024-09-30)
    Replacement files for entities 1 and 2. Entity 4 was moved to new database (HF032). New data file entered as new entity 4.
  • Version6 (2025-10-02)
    Replacement dataset for entity 1, includes data from 2015-2023; some trib_name modifications and additions