Stilling basin design and operation for water quality : field testing, final report.

McLaughlin, Richard A.; North Carolina State University. Soil Science Dept.

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

i

Stilling basin design and operation for water quality : field testing, final report.

2008-06-15
By McLaughlin, Richard A.

English

Details You May Also Like

Details:

Creators:

McLaughlin, Richard A.
Corporate Creators:

North Carolina State University. Soil Science Dept.
Subject/TRT Terms:

[+]

Polyacrylamide Roads--Design And Construction--Environmental Aspects--North Carolina Sedimentation Sedimentation And Deposition--North Carolina Stilling Basins Turbidity Water--Pollution--North Carolina--Prevention
Publication/ Report Number:

FHWA/NC/2007-02
Resource Type:

Tech Report
Geographical Coverage:

North Carolina
Edition:

Final report; July 2007-June 2008.
Corporate Publisher:

North Carolina. Department of Transportation. Research and Analysis Group
Abstract:

Many construction projects involve the need to pump turbid water from borrow pits or other excavations into stilling

basins or sediment bags prior to discharge. The design and operation of these basins needs to be optimized to

provide the best water treatment prior to discharge. This project was designed to provide an evaluation of stilling

basin designs and polyacrylamide (PAM) injection to minimize turbidity in discharged water. A Piedmont subsoil

was mixed with water in a large holding pond which served as a source of the turbid water which was pumped into

the stilling basin. Initial turbidities were in the range of 250-400 nephelometric turbidity units (NTU) in the source

basin. Physical changes to the open basin, both with porous baffles and distribution along the bottom, significantly

reduced turbidity or total suspended solids in the stilling basin, but the highest reduction was only 25%. Chemical

treatment with PAM reduced turbidity and TSS by up to 88% and 84%, respectively, with little effect from the

baffles or bottom spreader. Both types of PAM dosing systems worked well. There was some evidence that flocs

formed after PAM treatment were intercepted by the dam slope. The porous baffle with 10% open pore space was

significantly more effective than the baffle with 45% open pore space, but only when no PAM was added. The

PAM treatments were highly effective and should be relatively simple and economical to use to reduce turbidity in

pumped water.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:8e81602710f0e07312c8724c4a357a1c9dd0562ba4c9ef9d263d5a57ada3db21
Download URL:

https://rosap.ntl.bts.gov/view/dot/17188/dot_17188_DS1.pdf
File Type:

[PDF-483.91 KB]