Data Package Metadata View Summary

Hubbard Brook Experimental Forest: Sediment Yield in Weir Basins, 1956 - ongoing

General Information

Data Package:

Local Identifier:

knb-lter-hbr.68.8

Title:

Hubbard Brook Experimental Forest: Sediment Yield in Weir Basins, 1956 - ongoing

Alternate Identifier:

DOI PLACE HOLDER

Abstract:

Each year the sediment that collects in the stilling basin behind the v-notch weir is measured, excavated, sampled, dried, and weighed for Watersheds 1 through 8 at the Hubbard Brook Experimental Forest. Oven-dry weights are then calculated for all the sediment removed from the basin and extrapolated back over the watershed as mass of soil material lost per unit area. These data were gathered at the Hubbard Brook Experimental Forest in Woodstock, NH, which is operated and maintained by the USDA Forest Service, Northern Research Station.

Publication Date:

2024-08-02

For more information:
Visit:	DOI PLACE HOLDER

Time Period

Begin:

1955-10-16

End:

2023-08-02

People and Organizations
Contact:	Hubbard Brook Ecosystem Study [ email ]
Organization:	USDA Forest Service, Northern Research Station
Associate:	Campbell, John (USDA Forest Service, Northern Research Station, Associated Party)
Associate:	Bailey, Amey (USDA Forest Service, Northern Research Station, Associated Party)
Associate:	Lany, Nina (USDA Forest Service, Northern Research Station, Associated Party)

Data Entities
Data Table Name:	weir sediment
Description:	weir sediment

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/68/8/b7c1330398b393ba151c72d6adc84ddf
Name:	weir sediment
Description:	weir sediment
Number of Records:	388
Number of Columns:	10

Table Structure

Object Name:

HBEF_weir_sediment.csv

Size:

21699 bytes

Authentication:

1833cdbe859b5bcf07d147db74350d7f Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

watershed

start_date

end_date

mass_organic

mass_mixed

mass_mineral

mass_total

volume_m3_ha

volume_yd3

notes

Definition:

watershed ID

date sediment began accumulating

date sediment removed from weir

dry kg per ha organic soil

dry kg per ha mixed organic and mineral soil

dry kg per ha mineral soil

total dry sediment kg per ha

dry cubic meter sediment per hectare

total dry cubic yards sediment

sampling notes

External Measurement Definition, Link:

has unit Kilogram per Hectare

has unit Cubic Meter per Hectare

Storage Type:

string

date

float

string

Measurement Type:

nominal

dateTime

ratio

nominal

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	watershed 1
Source

Code Definition

Code	2
Definition	watershed 2
Source

Code Definition

Code	3
Definition	watershed 3
Source

Code Definition

Code	4
Definition	watershed 4
Source

Code Definition

Code	5
Definition	watershed 5
Source

Code Definition

Code	6
Definition	watershed 6
Source

Code Definition

Code	7
Definition	watershed 7
Source

Code Definition

Code	8
Definition	watershed 8
Source

Format	YYYY-MM-DD
Precision

Format	YYYY-MM-DD
Precision

Unit	kilogramPerHectare
Type	real
Min	0
Max	47.7

Unit	kilogramPerHectare
Type	real
Min	0
Max	39.9

Unit	kilogramPerHectare
Type	real
Min	0
Max	168.3

Unit	kilogramPerHectare
Type	real
Min	0.1
Max	196.3

Unit	cubicMeterPerHectare
Type	real
Min	0.001
Max	0.804

Unit	cubicYard
Type	real
Min	0.03
Max	36.9

Definition

sampling notes

Missing Value Code:

Code	NA
Expl	date not known

Code	NA
Expl	date not known

Code	NA
Expl	not measured

Code	NA
Expl	not measured

Code	NA
Expl	not measured

Code	NA
Expl	not measured

Code	NA
Expl	not measured

Code	NA
Expl	not measured

Code	NA
Expl	none

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	ecosystems, forests, watersheds, basins, sediment, soil
LTER Core Research Area	disturbance
HBES Vocabulary	HBR, Hubbard Brook LTER, Hubbard Brook Experimental Forest, Hubbard Brook Ecosystem Study, HBES, HBEF, New Hampshire, NH, White Mountain National Forest, weir
ISO 19115 Topic Category	inlandWaters
National Research & Development Taxonomy	Ecology, Ecosystems, & 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:

SAMPLING DESIGN

Each year the sediment that collects in the stilling basin behind each of the nine v-notch weirs at the Hubbard Brook Experimental Forest is cleaned out. Two methods have been used to document the amount of accumulated sediment between cleanings. From 1955 – 1998, sediment volume was measured by cross sectional survey via surveying with stadia surveying rods along a grid inside the weir for each empty weir and then with the accumulated sediment. The difference was calculated to determine total sediment volume in cubic yards, and then area-weighted sediment volume was calculated by converting to cubic meters and dividing by watershed area in hectares. Beginning in 1975 (1965 for weir 6), sediment was also weighed. For the smaller weirs, all the sediment is weighed between cleanings. For larger weirs, subsamples were collected for wet weight and then dried. Dry weights are then calculated for all the sediment removed from the basin and extrapolated back over the watershed as mass of soil material lost per unit area. This is done by adding up the total wet weight extracted from weir basin by mineral, organic and mixed (or total sediment if not separated out by type) and multiplying by estimated dry weight of the subsamples. That number is divided by weir area to give kg/ha. In 1998 volume measurements were ended at all weirs and the three small weirs (weirs 1, 5 and 6) were chosen for ongoing routine sediment measurement by way of the weighing method. The remaining weirs are cleaned annually but not measured for sediment.

WATERSHED SPECIFIC NOTES

WS-1 (11.8 ha) Sediment volumes have been estimated by the 3-dimensional cross-sectional area basis from1956-1998. However, data from 1960, 61, 62, and 64 are missing. It is unknown whether the data for 1963 and 1965 are for single or multiple years. Starting in 1975, the addition of sediment mass was determined by collecting 3 subsamples during the volume measurements. Wet weight was determined then the samples were dried, reweighed, averaged, and a volume to dry weight conversion was made for the entire basin based on the conversion factor of the subsample. In 1999 cross sectional volume measurements were terminated and weighing of all sediment during the cleaning began. The sediment was recorded and weighed as mineral, organic, or a mix of both. From 2000 to the present the total weight of sediment collected behind the v notch is accounted for as a total of mineral, organic and a mix of both. From 2002-2005 weir 1 was cleaned and the sediment weighed, however, the data have been misplaced. Weir 1 is a 90 degree sharp-crested V-notch weir with a 2-foot notch, but it is a very shallow weir and may not retain as much sediment as the others of the same type.

WS-2 (15.6 ha) Cross-sectional sediment volumes were estimated from 1957-1959. Data are missing from 1960-1963. Cross-sectional data are available for 1965. Volume data for 1966, 67, 68, 70, and 71 were provided by Yale by measuring all sediment in containers of known volume. Data are missing for 1969, and for 1972-75. For the period 1976-1998 volumes were estimated using the 3-dimensional cross-sectional area method. Mass for 1976-present was also estimated by the volume/dry weight method with up to 3 subsamples. Weir 2 is fitted with a 2-foot 120 degree sharp crested V-notch with a large basin. But the watershed was clear-felled in 1965 and treated with herbicides for 3 years. Since 1965, the forest has been regrowing.

WS-3 (42.4 ha) Sediment volume has been estimated by the 3-dimensional cross-sectional area method from 1957-1998. Data are missing for 1960-62 and for 1964. Sediment mass has been estimated by the volume/dry weight method from 1975-1998. Weir 3 is fitted with a 2-foot 120 degree sharp crested V-notch. The watershed is the untreated hydrologic reference watershed.

WS-4 (36.1 ha) Sediment volume was estimated by the 3-dimensional cross-sectional area method from 1965-1998. Sediment mass was estimated by the volume/dry weight method from 1975-1998. Weir 4 is fitted with a 2-foot 120 degree sharp crested V-notch. One third of the watershed was harvested in 25m wide strips in 1970, 1972, and 1974, and is now regrowing.

WS-5 (21.9) Sediment volume was estimated by the 3-dimensional cross-sectional area method during 1965-1983. There are no volume data after 1983. Sediment mass was estimated by the volume/dry weight method during 1975-1983. From 1984-present, mass is estimated by weighing all the sediment wet and drying subsamples to obtain a wet/dry sediment weight factor. In 1976, Bob Bilby removed the debris dams from the lower reaches of the stream just above the weir. WS-5 is fitted with a 1-foot 90 deg. sharp crested V-notch and a modified San Dimas flume. As a result prior to October 1983 most of the sediment carried during high flow events bipassed the basin and was not caught. In October 1983, a sediment trap including a net was built immediately below the notch. The net trapped the following percent of the annual totals: 1984 0.2 percent; 1985 7.4 percent; 1986 0.3 percent; 1987 0.1percent.

WS-6 (13.2 ha) Sediment volume was estimated by the 3-dimensional cross-sectional area method from 1965-1972. Data are missing for 1969. Sediment mass has been estimated from 1966 - present by weighing all sediment wet, then drying subsamples for wet/dry weight ratios. These weights have been determined by a variety of workers: Tony Dominski, Judy Meyers, Bob Bilby, USFS. Weir 6 like Weir 5 has a 1-foot 90 degree sharp crested V-notch and a modified San Dimas flume, but no additional sediment trap. Most sediment during high flows bypasses the basin and is not sampled.

WS-7 (76.4 ha) and WS-8 (59.4 ha) Sediment volumes were estimated by cross-sectional area in Weir 7 since 1967, and in Weir 8 since 1970. There are no missing data. Missing values indicate years when there was not enough sediment to bother cleaning. Therefore, the value of 0.075 for WS-8 for 1975 represents 5 years of sediment. 0.010 for WS-7 for 1986 represents 2 years of data. WS-7 and 8 also have flumes so considerable sediment is lost at high flow. Beginning with 1990, Weirs 7 and 8 were cleaned but the sediment was neither measured nor weighed.

WS-9 Weir 9 was built in 1994 and is cleaned annually, but the sediment is neither measured nor weighed.

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@edirepository.org

Web Address:

https://edirepository.org

Id:

https://ror.org/0330j0z60

Creators:

Organization:

USDA Forest Service, Northern Research Station

Contacts:

Organization:

Hubbard Brook Ecosystem Study

Email Address:

hbr-im@lternet.edu

Associated Parties:

Individual:

John Campbell

Organization:

USDA Forest Service, Northern Research Station

Email Address:

john.campbell2@usda.gov

Id:

https://orcid.org/0000-0003-4956-1696

Role:

Associated Party

Individual:

Amey Bailey

Organization:

USDA Forest Service, Northern Research Station

Email Address:

amey.bailey@usda.gov

Id:

https://orcid.org/0000-0003-3848-8550

Role:

Associated Party

Individual:

Nina Lany

Organization:

USDA Forest Service, Northern Research Station

Email Address:

nina.lany@usda.gov

Id:

https://orcid.org/0000-0003-0868-266X

Role:

Associated Party

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

1955-10-16

End:

2023-08-02

Geographic Region:

Description:

Hubbard Brook Experimental Forest

Bounding Coordinates:

Northern:	43.959	Southern:	43.914
Western:	-71.8062	Eastern:	-71.7022

Sampling Site:

Description:

Weir 1

Site Coordinates:

Longitude (degree):

-71.726501

Latitude (degree):

43.952034

Sampling Site:

Description:

Weir 2

Site Coordinates:

Longitude (degree):

-71.724174

Latitude (degree):

43.953358

Sampling Site:

Description:

Weir 3

Site Coordinates:

Longitude (degree):

-71.722816

Latitude (degree):

43.954872

Sampling Site:

Description:

Weir 4

Site Coordinates:

Longitude (degree):

-71.725792

Latitude (degree):

43.950176

Sampling Site:

Description:

Weir 5

Site Coordinates:

Longitude (degree):

-71.731918

Latitude (degree):

43.948845

Sampling Site:

Description:

Weir 6

Site Coordinates:

Longitude (degree):

-71.735641

Latitude (degree):

43.94994

Sampling Site:

Description:

Weir 7

Site Coordinates:

Longitude (degree):

-71.767075

Latitude (degree):

43.927509

Sampling Site:

Description:

Weir 8

Site Coordinates:

Longitude (degree):

-71.759521

Latitude (degree):

43.929436

Sampling Site:

Description:

Weir 9

Site Coordinates:

Longitude (degree):

-71.747185

Latitude (degree):

43.926014

Project

Parent Project Information:

Title:

Hubbard Brook Experimental Forest Long-Term Data Collection

Personnel:

Organization:	USDA Forest Service, Northern Research Station
Role:	Principal Investigator

Funding:

USDA Forest Service Northern Research Station

Related Project:

Title:

Long-Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest (1988)

Personnel:

Individual:

Timothy J Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 8702331

Related Project:

Title:

Long-Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest (1992)

Personnel:

Individual:

Timothy J Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 9211768

Related Project:

Title:

Long-Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest (1998)

Personnel:

Individual:

Timothy J Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 9810221

Related Project:

Title:

Long-Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest (2005)

Personnel:

Individual:

Timothy J Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 0423259

Related Project:

Title:

Long-Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest (2010)

Personnel:

Individual:

Timothy J Fahey

Organization:

Cornell University

Email Address:

tjf5@cornell.edu

Id:

https://orcid.org/0000-0003-1283-1162

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 1114804

Related Project:

Title:

Long-Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest (2016)

Personnel:

Individual:

Peter M Groffman

Organization:

Cary Institute of Ecosystem Studies

Email Address:

groffmanp@caryinstitute.org

Id:

https://orcid.org/0000-0001-8371-6255

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 1637685

Related Project:

Title:

Long-Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest (2022)

Personnel:

Individual:

Peter M Groffman

Organization:

Cary Institute of Ecosystem Studies

Email Address:

groffmanp@caryinstitute.org

Id:

https://orcid.org/0000-0001-8371-6255

Role:

Principal Investigator

Funding:

National Science Foundation (NSF) 2224545

Maintenance

Maintenance:

Description:	ongoing
Frequency:

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n      '
        |___element 'metadata'
        |     |___text '\n         '
        |     |___element 'unitList'
        |     |     |___text '\n            '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'cubicYard'
        |     |     |     |  \___attribute 'name' = 'cubicYard'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = ''
        |     |     |     |___text '\n               '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'cubic yards'
        |     |     |     |___text '\n            '
        |     |     |___text '\n            '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'cubicMeterPerHectare'
        |     |     |     |  \___attribute 'name' = 'cubicMeterPerHectare'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = ''
        |     |     |     |___text '\n               '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'cubic meters per hectare'
        |     |     |     |___text '\n            '
        |     |     |___text '\n         '
        |     |___text '\n      '
        |___text '\n   '

Additional Metadata

additionalMetadata
        |___text '\n      '
        |___element 'metadata'
        |     |___text '\n         '
        |     |___element 'emlEditor'
        |     |     |___text '\n            '
        |     |     |___element 'app'
        |     |     |     |___text 'EMLassemblyline'
        |     |     |___text '\n            '
        |     |     |___element 'release'
        |     |     |     |___text '3.5.5'
        |     |     |___text '\n         '
        |     |___text '\n      '
        |___text '\n   '

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Data Package Metadata View Summary

Hubbard Brook Experimental Forest: Sediment Yield in Weir Basins, 1956 - ongoing

Data Entities

Data Table

Data Package Usage Rights

Keywords

Methods and Protocols

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

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Metadata

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Hubbard Brook Experimental Forest: Sediment Yield in Weir Basins, 1956 - ongoing

+/- Data Entities

Data Table

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

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

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Metadata

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata

Additional Metadata