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Water 2015, 7(7), 3407-3430; doi:10.3390/w7073407

Stormwater Field Evaluation and Its Challenges of a Sediment Basin with Skimmer and Baffles at a Highway Construction Site

1
Department of Civil Engineering, Auburn University, Auburn, AL 36849-5337, USA
2
Turner Construction Company, 5300 Virginia Way, Brentwood, TN 37027, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Ataur Rahman
Received: 6 May 2015 / Revised: 17 June 2015 / Accepted: 26 June 2015 / Published: 30 June 2015
View Full-Text   |   Download PDF [2081 KB, uploaded 30 June 2015]   |  

Abstract

A field-scale data collection plan to monitor and evaluate the performance of a sediment basin design was developed and implemented using portable automatic stormwater samplers, flow modules, a rain gauge, and inflow weirs. The design configuration consisted of a skimmer as the primary dewatering device, three coir baffles installed inside the basin, polyacrylamide flocculant blocks and ditch checks in the inflow channel. A sediment basin built on a highway construction site in Franklin County, Alabama, U.S. using the aforementioned design configuration was monitored over 16 rainfall events from 15 November 2011 to 6 February 2012. The basin effectively removed sediments during the early stages of construction when the correct type of polyacrylamide flocculant blocks was used, e.g., 97.9% of sediment removal after a rainfall event on 16 November 2011. It is difficult and challenging to dose sediment-laden stormwater inflow with an exact amount of flocculating agent across all runoff producing events since rainfall is a stochastic variable. Based upon results from this study, it is recommended that a minimum volume of 251.9 m3/ha of contributing drainage area be used to sufficiently size a basin, which is still significantly under-designed for a 2-year, 24-h storm event in the southeast. This paper presents challenges and lessons learned regarding sediment basin design, monitoring, and performance that are beneficial to future studies. View Full-Text
Keywords: best management practice; erosion and sediment transport; sediment basin; stormwater management; runoff control; turbidity; monitoring; construction site best management practice; erosion and sediment transport; sediment basin; stormwater management; runoff control; turbidity; monitoring; construction site
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Fang, X.; Zech, W.C.; Logan, C.P. Stormwater Field Evaluation and Its Challenges of a Sediment Basin with Skimmer and Baffles at a Highway Construction Site. Water 2015, 7, 3407-3430.

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