Home > Research > Publications & Outputs > Spatial representation of in-stream sediment ph...

Links

Text available via DOI:

View graph of relations

Spatial representation of in-stream sediment phosphorus release combining channel network approaches and in-situ experiments

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Spatial representation of in-stream sediment phosphorus release combining channel network approaches and in-situ experiments. / Stutter, M.; Richards, S.; Ibiyemi, A. et al.
In: Science of the Total Environment, Vol. 795, 148790, 15.11.2021.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

APA

Vancouver

Stutter M, Richards S, Ibiyemi A, Watson H. Spatial representation of in-stream sediment phosphorus release combining channel network approaches and in-situ experiments. Science of the Total Environment. 2021 Nov 15;795:148790. Epub 2021 Jun 29. doi: 10.1016/j.scitotenv.2021.148790

Author

Stutter, M. ; Richards, S. ; Ibiyemi, A. et al. / Spatial representation of in-stream sediment phosphorus release combining channel network approaches and in-situ experiments. In: Science of the Total Environment. 2021 ; Vol. 795.

Bibtex

@article{97e60a0b8e714d32ac4636229beff55d,
title = "Spatial representation of in-stream sediment phosphorus release combining channel network approaches and in-situ experiments",
abstract = "Impairment of rivers by elevated phosphorus (P) concentration is an issue often studied at outlets of mesoscale catchments. Our objective was to evaluate within-catchment spatio-temporal processes along connected reaches to understand processes of internal P loading associated with sediment input, accumulations in channels and sediment-water column P exchange. Our overall hypothesis was that heterogeneous sediment residence within the channel of a 52 km2 mixed land cover catchment resulted in key zones for sediment-water P exchange. We evaluated the channel network through ground-survey, spatial data methods establishing connectivity and energy gradients. This gave a background to understand sampling of sediments and P release/uptake to the water column using 90 s in-situ resuspension isolating a portion of streambed over five sets of three-location transects in May (spring storms, recent active erosion) and September (summer low flow, longer sediment residence). Simple transect position models (top, mid, bottom) predicted increased sediment resuspension yields and P contents in lower settings. Sediment P release following resuspension were mean (and range) 0.5 (−0.8 to 1.8) and 0.5 (−2.5 to 3.6) mg soluble reactive P/m2 bed in May and September, respectively, strengthening generally down the transects but inconsistently. Relationships (log form) showed a steepening rise in fine sediments, P content, background and disturbance-released dissolved P, with specific stream power < 40 W/m2. In-situ methods showed sediments dominantly (12 cases May, 13 cases Sep) as P sources capable of influencing dissolved P concentrations and with potential explanation that heterogeneous locations of internal P loading influence the systems longer-term observed P trends. Combining channel network, stream power assessment and in-situ sorption studies improved the understanding of influential zones of sediment-water P exchange within this mesoscale catchment. Such methods have potential to inform P model development and management.  ",
keywords = "Channel network, Phosphorus, Sediment-water exchange, Stream energy, Catchments, Loading, Rivers, Runoff, Mesoscale catchments, P contents, Phosphorus release, Re-suspension, Spatial representations, Stream sediments, Water columns, Sediments",
author = "M. Stutter and S. Richards and A. Ibiyemi and H. Watson",
year = "2021",
month = nov,
day = "15",
doi = "10.1016/j.scitotenv.2021.148790",
language = "English",
volume = "795",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier Science B.V.",

}

RIS

TY - JOUR

T1 - Spatial representation of in-stream sediment phosphorus release combining channel network approaches and in-situ experiments

AU - Stutter, M.

AU - Richards, S.

AU - Ibiyemi, A.

AU - Watson, H.

PY - 2021/11/15

Y1 - 2021/11/15

N2 - Impairment of rivers by elevated phosphorus (P) concentration is an issue often studied at outlets of mesoscale catchments. Our objective was to evaluate within-catchment spatio-temporal processes along connected reaches to understand processes of internal P loading associated with sediment input, accumulations in channels and sediment-water column P exchange. Our overall hypothesis was that heterogeneous sediment residence within the channel of a 52 km2 mixed land cover catchment resulted in key zones for sediment-water P exchange. We evaluated the channel network through ground-survey, spatial data methods establishing connectivity and energy gradients. This gave a background to understand sampling of sediments and P release/uptake to the water column using 90 s in-situ resuspension isolating a portion of streambed over five sets of three-location transects in May (spring storms, recent active erosion) and September (summer low flow, longer sediment residence). Simple transect position models (top, mid, bottom) predicted increased sediment resuspension yields and P contents in lower settings. Sediment P release following resuspension were mean (and range) 0.5 (−0.8 to 1.8) and 0.5 (−2.5 to 3.6) mg soluble reactive P/m2 bed in May and September, respectively, strengthening generally down the transects but inconsistently. Relationships (log form) showed a steepening rise in fine sediments, P content, background and disturbance-released dissolved P, with specific stream power < 40 W/m2. In-situ methods showed sediments dominantly (12 cases May, 13 cases Sep) as P sources capable of influencing dissolved P concentrations and with potential explanation that heterogeneous locations of internal P loading influence the systems longer-term observed P trends. Combining channel network, stream power assessment and in-situ sorption studies improved the understanding of influential zones of sediment-water P exchange within this mesoscale catchment. Such methods have potential to inform P model development and management.  

AB - Impairment of rivers by elevated phosphorus (P) concentration is an issue often studied at outlets of mesoscale catchments. Our objective was to evaluate within-catchment spatio-temporal processes along connected reaches to understand processes of internal P loading associated with sediment input, accumulations in channels and sediment-water column P exchange. Our overall hypothesis was that heterogeneous sediment residence within the channel of a 52 km2 mixed land cover catchment resulted in key zones for sediment-water P exchange. We evaluated the channel network through ground-survey, spatial data methods establishing connectivity and energy gradients. This gave a background to understand sampling of sediments and P release/uptake to the water column using 90 s in-situ resuspension isolating a portion of streambed over five sets of three-location transects in May (spring storms, recent active erosion) and September (summer low flow, longer sediment residence). Simple transect position models (top, mid, bottom) predicted increased sediment resuspension yields and P contents in lower settings. Sediment P release following resuspension were mean (and range) 0.5 (−0.8 to 1.8) and 0.5 (−2.5 to 3.6) mg soluble reactive P/m2 bed in May and September, respectively, strengthening generally down the transects but inconsistently. Relationships (log form) showed a steepening rise in fine sediments, P content, background and disturbance-released dissolved P, with specific stream power < 40 W/m2. In-situ methods showed sediments dominantly (12 cases May, 13 cases Sep) as P sources capable of influencing dissolved P concentrations and with potential explanation that heterogeneous locations of internal P loading influence the systems longer-term observed P trends. Combining channel network, stream power assessment and in-situ sorption studies improved the understanding of influential zones of sediment-water P exchange within this mesoscale catchment. Such methods have potential to inform P model development and management.  

KW - Channel network

KW - Phosphorus

KW - Sediment-water exchange

KW - Stream energy

KW - Catchments

KW - Loading

KW - Rivers

KW - Runoff

KW - Mesoscale catchments

KW - P contents

KW - Phosphorus release

KW - Re-suspension

KW - Spatial representations

KW - Stream sediments

KW - Water columns

KW - Sediments

U2 - 10.1016/j.scitotenv.2021.148790

DO - 10.1016/j.scitotenv.2021.148790

M3 - Journal article

VL - 795

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

M1 - 148790

ER -