Short Citation:
Office for Coastal Management, 2021: Dams and Sediment in the Hudson (DaSH) - NERRS/NSC(NERRS Science Collaborative), https://www.fisheries.noaa.gov/inport/item/47702.

Item Identification

Title: Dams and Sediment in the Hudson (DaSH) - NERRS/NSC(NERRS Science Collaborative)
Status: Completed
Creation Date: 2020
Publication Date: 2017-09-01
Abstract:

Dams and Sediment in the Hudson answered key questions about how dam removal will impact conditions in the estuary and offered surprising new findings about tidal marshes in the Hudson River valley. The project used a multidisciplinary approach that combined field observations with an analysis of sediment transport using a proven hydrodynamic model.

Researchers surveyed 17 representative dams in the Lower Hudson River watershed by measuring water depth and sediment thickness and collecting sediment cores. Results were extrapolated to the 1700 registered dams located on tributaries of the Lower Hudson River to estimate the total amount of sediment trapped in the watershed. These observations were complemented by an analysis of sediment discharge data from existing monitoring stations on tributaries to characterize typical sediment input to the estuary and conditions following major storm events. A numerical model of circulation and sediment transport in the estuary was used to evaluate the impact of dam removal scenarios. To understand sediment contributions to tidal wetlands along the Hudson, researchers collected transects of sediment core from 6 representative tidal wetlands and coves. Geochronological data of sediment cores combined with an analysis of historical and aerial photos was used to assess when wetlands began to form and their rates of accumulation.

Results show that dam removals would have a minimal impact on sediment supply to the estuary and tidal wetland growth. Only 10% of dams in the Lower Hudson River watershed are effective sediment traps, and the potential amount of sediment that would be released if all dams were removed represents less than 2 years average sediment input from the watershed. Tidal wetlands along the Hudson were found to be remarkably young and rapidly accumulating sediment despite the presence of dams, growing vertically at rates several times faster than sea level rise.

Purpose:

Hundreds of dams built on tributaries of the Hudson River estuary have outlived their usefulness. Removing these relic dams is a priority for the state of New York in order to improve aquatic habitat connectivity, restore fish spawning grounds, and reduce the risk of dam failure. For those who regulate and permit dam removal, questions about the fate of sediment trapped behind these dams and its potential impact on downstream habitat has encumbered the permitting process. To better understand how sediment released by dam removal in the lower Hudson River watershed will affect the estuary, including the potential for dam-derived sediments to help offset sea level rise in tidal wetlands, the Dams and Sediment in the Hudson project brought together a collaborative team of scientists and stakeholders to research key questions and provide practical tools to regulators and practitioners.

Notes:

Loaded by FGDC Metadata Uploader, batch 10156, 10-31-2017 15:33

Supplemental Information:

David Ralston

Woods Hole Oceanographic Institution

dralston@whoi.edu

(508) 289-2587

Partners:

Consensus Building Institute

Hudson River NERR, NY

University of Massachusetts–Amherst

Woods Hole Oceanographic Institution

==About the data

In addition to the sediment data links listed in the URL section, is also:

Hudson River Estuary Model Simulations of Dam Sediment Releases

Model outputs from simulations of dam removal scenarios, generated using a hydrodynamic and sediment transport model for the Lower Hudson River. Data access: Data files are large (32 GB/file, 60 files per case) and cannot be served remotely at this time. Data are available by contacting David Ralston.

DOI (Digital Object Identifier): https://doi.org/10.7275/dh3v-0x33

Keywords

Theme Keywords

Thesaurus Keyword
NASA Global Change Master Directory (GCMD) Science and Services Keywords EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > SEA LEVEL RISE > INUNDATION
NASA Global Change Master Directory (GCMD) Science and Services Keywords EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT
NASA Global Change Master Directory (GCMD) Science and Services Keywords EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT > ENVIRONMENTAL ASSESSMENTS
NASA Global Change Master Directory (GCMD) Science and Services Keywords EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS
NASA Global Change Master Directory (GCMD) Science and Services Keywords EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > FLUVIAL LANDFORMS > WATERSHED/DRAINAGE BASIN
None dam
None sediment

Spatial Keywords

Thesaurus Keyword
None Hudson River NERR, NY

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Distribution Liability:

The distributor does not assume liability.

Support Roles

Data Steward

CC ID: 999887
Date Effective From: 2015
Date Effective To:
Contact (Organization): Office for Coastal Management (OCM)
Address: 2234 South Hobson Avenue
Charleston, SC 29405-2413
URL: https://www.coast.noaa.gov/

Distributor

CC ID: 999888
Date Effective From: 2015
Date Effective To:
Contact (Organization): Office for Coastal Management (OCM)
Address: 2234 South Hobson Avenue
Charleston, SC 29405-2413
URL: https://www.coast.noaa.gov/

Metadata Contact

CC ID: 596183
Date Effective From: 2017-10-31
Date Effective To:
Contact (Person): Cothran, Jeremy
Email Address: jeremy.cothran@gmail.com

Originator

CC ID: 598488
Date Effective From: 2016-11
Date Effective To: 2019
Contact (Person): Ralston, David
Email Address: dralston@whoi.edu

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 596182
W° Bound: -74
E° Bound: -73.875
N° Bound: 41.33
S° Bound: 41
Description

Hudson River, NY NERR

Extent Group 1 / Time Frame 1

CC ID: 596181
Time Frame Type: Range
Start: 2016-11
End: 2020-03

Access Information

Security Class: Unclassified
Data Access Constraints:

None

Data Use Constraints:

Cite this dataset when used as a source: NOAA retains the right to analyze, synthesize and publish summaries of the NERRS/NSC data. The NERRS/NSC retains the right to be fully credited for having collected and process the data. Following academic courtesy standards, the NERR site where the data were collected should be contacted and fully acknowledged in any subsequent publications in which any part of the data are used. The data enclosed within this package/transmission are only as accurate as the quality assurance and quality control procedures that are described in the associated metadata reporting statement allow. The user bears all responsibility for its subsequent use/misuse in any further analyses or comparisons. The Federal government does not assume liability to the Recipient or third persons, nor will the Federal government reimburse or indemnify the Recipient for its liability due to any losses resulting in any way from the use of this data. Requested citation format: NOAA National Estuarine Research Reserve System (NERRS) Science Collaborative(NSC).

Distribution Information

Distribution 1

CC ID: 999889
Download URL: http://www.nerrssciencecollaborative.org/project/Ralston16
Distributor: Office for Coastal Management (OCM) (2015 - Present)
File Name: Ralston16
File Type: Multiple formats

URLs

URL 1

CC ID: 598336
URL: http://www.nerrssciencecollaborative.org/project/Ralston16
Name: Ralston16
URL Type:
Online Resource

URL 2

CC ID: 992466
URL: https://doi.org/10.7275/xktv-8m12
Name: Ralston16
URL Type:
Online Resource
Description:

Sediment core data collected during 2017-2018 from 17 dam impoundments located on tributaries to the tidal portion of the Hudson River. Data archive

URL 3

CC ID: 992467
URL: https://doi.org/10.7275/dh3v-0x33
Name: Ralston16
URL Type:
Online Resource
Description:

Sediment core data collected from six tidal wetland complexes located within the Hudson River estuary. Data archive

Data Quality

Representativeness:

N/A

Quality Control Procedures Employed:

This information is detailed within the project links.

Lineage

Lineage Statement:

This information is detailed within the project links.

Sources

N/A

CC ID: 999891

Process Steps

Process Step 1

CC ID: 999892
Description:

N/A

Process Contact: Office for Coastal Management (OCM)

Catalog Details

Catalog Item ID: 47702
Metadata Record Created By: Jeremy Cothran
Metadata Record Created: 2017-10-31 15:33+0000
Metadata Record Last Modified By: Jeremy Cothran
Metadata Record Last Modified: 2020-12-22 16:51+0000
Metadata Record Published: 2019-11-08
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2020-11-08