Road deposited sediment: implications for the performance of filter drains servicing strategic trunk roads

Ged Mitchell, Kehinde Oduyemi, Joseph Akunna*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

This study investigates the contribution of road deposited sediment (RDS) to clogging and the operational lifecycle of Highway Filter Drains (HFDs). RDS samples were collected from 9 Scottish trunk roads and fractionated into grain size classes to determine their particle size distributions (PSD). Results show that RDS PSDs, and the percentage of each grain size fraction, are highly variable. However, despite being collected from different trunk roads, PSD trends are similar, with individual RDS particles ranging in size from <63 μm to >10,000 μm. Medium sand, coarse sand, fine gravel and medium gravel make up 84.1% of the total particle mass concentration, with particles >1,000 μm mostly mineral or asphalt. The study also reveals that the dynamic nature of a trunk road catchment dictates that grading envelopes are essentially instantaneous values. These findings indicate that large particles from the road surface, contribute to clogging and have the potential to reduce the operational lifecycle of HFDs. The study also demonstrated that assuming a single RDS PSD profile for filter drain asset management purposes is unlikely to be representative of a trunk road catchment profile.
Original languageEnglish
Pages (from-to)747-761
Number of pages15
JournalWater Science & Technology
Volume80
Issue number4
Early online date18 Sep 2019
DOIs
Publication statusE-pub ahead of print - 18 Sep 2019

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drain
Sediments
road
filter
Particle size analysis
sediment
Gravel
Catchments
Sand
particle size
Asset management
gravel
Asphalt
grain size
Particles (particulate matter)
catchment
Minerals
sand
trunk road
asphalt

Cite this

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title = "Road deposited sediment: implications for the performance of filter drains servicing strategic trunk roads",
abstract = "This study investigates the contribution of road deposited sediment (RDS) to clogging and the operational lifecycle of Highway Filter Drains (HFDs). RDS samples were collected from 9 Scottish trunk roads and fractionated into grain size classes to determine their particle size distributions (PSD). Results show that RDS PSDs, and the percentage of each grain size fraction, are highly variable. However, despite being collected from different trunk roads, PSD trends are similar, with individual RDS particles ranging in size from <63 μm to >10,000 μm. Medium sand, coarse sand, fine gravel and medium gravel make up 84.1{\%} of the total particle mass concentration, with particles >1,000 μm mostly mineral or asphalt. The study also reveals that the dynamic nature of a trunk road catchment dictates that grading envelopes are essentially instantaneous values. These findings indicate that large particles from the road surface, contribute to clogging and have the potential to reduce the operational lifecycle of HFDs. The study also demonstrated that assuming a single RDS PSD profile for filter drain asset management purposes is unlikely to be representative of a trunk road catchment profile.",
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Road deposited sediment : implications for the performance of filter drains servicing strategic trunk roads. / Mitchell, Ged; Oduyemi, Kehinde; Akunna, Joseph.

In: Water Science & Technology, Vol. 80, No. 4, 18.09.2019, p. 747-761.

Research output: Contribution to journalArticle

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