Design and maintenance of subsurface gravel wetlands.

Ballestero, Thomas P.; Houle, James; University of New Hampshire. Dept. of Civil Engineering

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Design and maintenance of subsurface gravel wetlands.

2015-02-01
By Ballestero, Thomas P. ; Houle, James

[PDF-3.78 MB]

English

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Details:

Creators:

Ballestero, Thomas P. ; Houle, James

Ballestero, Thomas P. ; Houle, James Less -
Corporate Creators:

University of New Hampshire. Dept. of Civil Engineering
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:

[+]

Costs Design Gravel Maintenance Runoff Subsurface Drainage Wetlands
Publication/ Report Number:

FHWA-NH-RD-15680W
Resource Type:

Tech Report
Geographical Coverage:

New Hampshire
Corporate Publisher:

New Hampshire. Dept. of Transportation. Bureau of Materials and Research
Abstract:

This report summarizes the University of New Hampshire Stormwater Center (UNHSC) evaluation of

a review of Subsurface Gravel Wetlands design and specifications used by the New Hampshire

Department of Transportation (NHDOT or Department).

Subsurface Gravel Wetlands (SGW) are a stormwater management system that provides nutrient

reduction by allowing runoff to flow through a buried horizontal layer of gravel which allows anaerobic

microbial treatment of surface runoff. UNHSC evaluated the Department’s SGW design parameters for

the application of SGWs on linear projects (i.e., roadways) including: underdrain systems for seasonally-high groundwater (SHGW); forebays; multiple inlets; low-flow conveyance and orifices; and leaching

chambers (hydraulic inlets). Results of the cost assessment indicates potential construction savings

greater than $5,000 per contributing impervious acre.
Format:

PDF
Funding:

15680W, A003(827)
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:7c8d701a75dad98edd691bd57f0bf18a2052eaef06df32683816ee5c20563107
Download URL:

https://rosap.ntl.bts.gov/view/dot/29114/dot_29114_DS1.pdf
File Type:

No Additional Files

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Design and maintenance of subsurface gravel wetlands.

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