Data Package Metadata View Summary

Hubbard Brook Experimental Forest: Watershed 3 Saturated Hydraulic Conductivity

General Information

Data Package:

Local Identifier:

knb-lter-hbr.364.1

Title:

Hubbard Brook Experimental Forest: Watershed 3 Saturated Hydraulic Conductivity

Alternate Identifier:

DOI PLACE HOLDER

Abstract:

This is a dataset of soil saturated hydraulic conductivity collected from augered boreholes or installed groundwater wells in Watershed 3 of the Hubbard Brook Experimental Forest. Hydraulic conductivity describes the ability of a porous medium such as soil to transmit fluid. It is dependent on both fluid (e.g., viscosity) and porous medium properties, and is a key property for estimating subsurface flow rates. Measurements were collected from near the soil surface (10-15 cm depth) to several meters below the surface. Locations are provided for sites where the confidence in coordinates established by GPS was high. Soil horizons without subordinate designators are approximate since the characterization skill of observers varied.

These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES) and several other NSF grants over the period from approximately 2007 to 2019. The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

Publication Date:

2022-12-16

For more information:
Visit:	DOI PLACE HOLDER

Time Period

Begin:

2007-05-01

End:

2019-05-31

People and Organizations
Contact:	Hubbard Brook Ecosystem Study [ email ]
Creator:	McGuire, Kevin J (Virginia Tech)
Creator:	Bailey, Scott W (USDA Forest Service, Northern Research Station)
Creator:	Gannon, JP (Virginia Tech)
Creator:	Benton, Josh R (North Carolina Geological Survey)

Data Entities
Data Table Name:	WS3_Ksat
Description:	soil saturated hydraulic conductivity from Watershed 3

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/364/1/1716abc55e229147fe45d60cbe7a4b65
Name:	WS3_Ksat
Description:	soil saturated hydraulic conductivity from Watershed 3
Number of Records:	173
Number of Columns:	8

Table Structure

Object Name:

WS3_Ksat.csv

Size:

7406 bytes

Authentication:

1ed6840f2e6d5df4b32e1e36294fcf06 Calculated By MD5

Text Format:

Number of Header Lines:

1

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

SiteID

Method

Lat

Lon

Depth_cm

Horizon

Ksat_cm/h

Observer

Definition:

site identification code; If the Method is a slug test, the SiteID corresponds to a well ID, which might have groundwater level data associated with in as part of dataset hbr.161

field method

latitude

longitude

mid-point of depth from the surface for the test

approximate soil horizon designation as determined by observer in the field

saturated hydraulic conductivity

last name of the person who conducted the field measurements

Storage Type:

string

string

float

float

float

string

float

string

Measurement Type:

nominal

nominal

ratio

ratio

ratio

nominal

ratio

nominal

Measurement Values Domain:

Definition

site identification code; If the Method is a slug test, the SiteID corresponds to a well ID, which might have groundwater level data associated with in as part of dataset hbr.161

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	B
Definition	borehole permeameter (Amoozemeter or a compact constant head permeameter)
Source

Code Definition

Code	S
Definition	slug test; slug test performed in a well
Source

Unit	degree
Type	real
Min	43.9557506
Max	43.96195066

Unit	degree
Type	real
Min	-71.722367
Max	-71.71881742

Unit	centimeter
Type	real
Min	10
Max	655

Definition

approximate soil horizon designation as determined by observer in the field

Unit	centimeterPerHour
Type	real
Min	0.02
Max	56.5

Definition

last name of the person who conducted the field measurements

Missing Value Code:

Code	-9999
Expl	missing or uncertain location

Code	-9999
Expl	missing or uncertain location

Code	-9999
Expl	missing

Code	-9999
Expl	missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. 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. Thank you.

Keywords

By Thesaurus:
LTER Controlled Vocabulary	soil, soil water, forests, watersheds
HBES Vocabulary	seeps and springs, HBR, Hubbard Brook LTER, Hubbard Brook Experimental Forest, Hubbard Brook Ecosystem Study, HBES, HBEF, New Hampshire, NH, White Mountain National Forest
National Research & Development Taxonomy	Ecology, Ecosystems, & Environment
ISO 19115 Topic Category	environment

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

Soil saturated hydraulic conductivity (Ksat) was estimated with one of two methods: borehole permeametry or slug tests. The borehole permeametry method is a constant-head method designed for maintaining a constant height of water in an auger borehole and measuring the water loss from the borehole over time. The geometry of the borehole, height of the water column in the borehole, and the steady-state volumetric flow rate were used to calculate the saturated hydraulic conductivity following equations provided in Amoozegar (1989) that were derived from Glover’s solution of gravitational flow from a cylindrical hole. Boreholes were augered with a 10 cm diameter bucket-type auger and measurements were progressively made with depth by deepening the borehole after each test. Four constant-head tubes provided up to -200 cm of pressure-head (i.e., vacuum) so that a constant head of water could be maintained in the bottom of an auger hole down to approximately 200 cm below the device. After each borehole was dug, the inner walls of the borehole often become smeared and were brushed to reduce any potential clogging of soil pores prior to the test.

Slug tests were performed in wells using a solid slug (i.e., a short section of PVC pipe filled with sand and sealed on both ends) that was lowered into the well below the water surface. Prior to lowering the slug into a well, a water-level pressure transducer (e.g., a Hobo level logger) was placed in each well. After the water level was at equilibrium, typically after a few hours, the slug was quickly extracted, and rising water levels were recorded at 10 second intervals until the change in water level was minimal. Hence, this method is sometimes called a rising head slug test (as opposed to a falling head slug test). These data were then analyzed using the Hvorslev (1951) method to determine saturated hydraulic conductivity.

Portions of the hydraulic conductivity data have been published in the following:

Benton, J. R., McGuire, K. J., & Schreiber, M. E. (2022). Subsurface permeability contrasts control shallow groundwater flow dynamics in the critical zone of a glaciated, headwater catchment. Hydrological Processes, 36( 9), e14672, https://doi.org/10.1002/hyp.14672. Detty, J. M., and McGuire, K. J. (2010), Threshold changes in storm runoff generation at a till-mantled headwater catchment, Water Resources Research, 46, W07525, https://doi.org/10.1029/2009WR008102.

Acknowledgements:

The following students helped to develop this dataset and conducted the field measurements used to estimate hydraulic conductivity: Maarten Slot, Margaret Burns, Joel Detty, and Kelly Floro.

References Cited:

Amoozegar, A. (1989), A Compact Constant-Head Permeameter for Measuring Saturated Hydraulic Conductivity of the Vadose Zone. Soil Science Society of America Journal, 53: 1356-1361. https://doi.org/10.2136/sssaj1989.03615995005300050009x.

Hvorslev, M. J. (1951). Time lag and soil permeability in ground-water observations, Bull. No. 36, Waterways Experiment Station, US Army Corps of Engineers, Vicksburg, MS.

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@edirepository.org

Web Address:

https://edirepository.org

Id:

https://ror.org/0330j0z60

Creators:

Individual:

Kevin J McGuire

Organization:

Virginia Tech

Email Address:

kevin.mcguire@vt.edu

Id:

https://orcid.org/0000-0001-5751-3956

Individual:

Scott W Bailey

Organization:

USDA Forest Service, Northern Research Station

Email Address:

scott.bailey@usda.gov

Id:

https://orcid.org/0000-0002-9160-156X

Individual:

JP Gannon

Organization:

Virginia Tech

Email Address:

jpgannon@vt.edu

Id:

https://orcid.org/0000-0002-4595-3214

Individual:

Josh R Benton

Organization:

North Carolina Geological Survey

Email Address:

joshua.benton@ncdenr.gov

Id:

https://orcid.org/0000-0002-1698-6455

Contacts:

Organization:

Hubbard Brook Ecosystem Study

Email Address:

hbr-im@lternet.edu

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2007-05-01

End:

2019-05-31

Geographic Region:

Description:

Hubbard Brook Experimental Forest, Watershed 3, Woodstock, NH, USA

Bounding Coordinates:

Northern:	43.962196	Southern:	43.95465
Western:	-71.725029	Eastern:	-71.716533

Project

Parent Project Information:

Title:

Landform controls on hydrologic flowpaths and pedogenesis explain solute retention and export from pedon to catchment scales

Personnel:

Individual:

Kevin J McGuire

Organization:

Virginia Tech

Email Address:

kevin.mcguire@vt.edu

Id:

https://orcid.org/0000-0001-5751-3956

Role:

Principal Investigator

Funding:

NSF EAR 1014507

Related Project:

Title:

Hubbard Brook Site REU Program

Personnel:

Individual:

Kevin J McGuire

Organization:

Virginia Tech

Email Address:

kevin.mcguire@vt.edu

Id:

https://orcid.org/0000-0001-5751-3956

Role:

Principal Investigator

Funding:

NSF DBI/EAR 0754678

Related Project:

Title:

Hydropedology of Hubbard Brook

Personnel:

Individual:

Scott W Bailey

Organization:

USDA Forest Service, Northern Research Station

Email Address:

scott.bailey@usda.gov

Id:

https://orcid.org/0000-0002-9160-156X

Role:

Principal Investigator

Funding:

USDA Forest Service, Northern Research Station (NRS) NA

Related Project:

Title:

Lateral weathering gradients typify critical zone architecture in glaciated catchments

Personnel:

Individual:

Kevin J McGuire

Organization:

Virginia Tech

Email Address:

kevin.mcguire@vt.edu

Id:

https://orcid.org/0000-0001-5751-3956

Role:

Principal Investigator

Funding:

NSF EAR 1643327

Related Project:

Title:

Landform controls on hydrologic flowpaths and pedogenesis explain solute retention and export from pedon to catchment scales

Personnel:

Individual:

Scott W Bailey

Organization:

USDA Forest Service, Northern Research Station

Email Address:

scott.bailey@usda.gov

Id:

https://orcid.org/0000-0002-9160-156X

Role:

Principal Investigator

Funding:

NSF EAR 1014507

Related Project:

Title:

Lateral weathering gradients typify critical zone architecture in glaciated catchments

Personnel:

Individual:

Scott W Bailey

Organization:

USDA Forest Service, Northern Research Station

Email Address:

scott.bailey@usda.gov

Id:

https://orcid.org/0000-0002-9160-156X

Role:

Principal Investigator

Funding:

NSF EAR 1643415

Maintenance

Maintenance:

Description:	ongoing
Frequency:

Other Metadata

Additional Metadata

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