Effects on biodiversity, physical conditions and sediment in streams receiving stormwater discharge treated and delayed in wet ponds

Lukasz Koziel*, Mette Juhl, Sara Egemose

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Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

The impact of human activities on watercourses has led to increased contamination, eutrophication, erosion and reduced biodiversity in streams and rivers. Increased urbanization is one of the factors that may influence the water quality. Wet stormwater ponds are a commonly used buffer structure to delay and treat the water before it reaches the recipient – often streams as studied in this paper. However, knowledge on how stormwater outlets from wet ponds may affect downstream recipients is still limited. We studied the impact of six outlets from wet stormwater ponds to streams in 2016 and 2017, by measurements in the streams upstream and downstream of the outlet. The aim was to study possible effects on physical conditions, sediment grain size and invertebrate community composition. The Fauna Index showed no significant differences between upstream and downstream stations. However, we found a significant decrease in biodiversity (Shannon-Wiener) and a significantly lower evenness downstream of the stormwater outlets, even though the water was delayed and treated in a pond first. The physical conditions were both positively and negatively affected depending on the specific outlet. Finally, the smallest particle fraction (<63 μm) in the stream sediments was reduced at downstream sites compared to upstream sites at four outlets indicating possible erosion effects. Our study shows that the stormwater outlets have an effect on the recipients, but whether it is measurable depends on the methods utilized.

OriginalsprogEngelsk
TidsskriftLimnologica
Vol/bind75
Sider (fra-til)11-18
ISSN0075-9511
DOI
StatusUdgivet - mar. 2019

Fingeraftryk

stormwater
pond
biodiversity
sediments
sediment
erosion
urbanization
fluvial deposit
eutrophication
anthropogenic activities
community composition
human activity
buffers
grain size
water quality
water
invertebrate
invertebrates
effect
physical conditions

Citer dette

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title = "Effects on biodiversity, physical conditions and sediment in streams receiving stormwater discharge treated and delayed in wet ponds",
abstract = "The impact of human activities on watercourses has led to increased contamination, eutrophication, erosion and reduced biodiversity in streams and rivers. Increased urbanization is one of the factors that may influence the water quality. Wet stormwater ponds are a commonly used buffer structure to delay and treat the water before it reaches the recipient – often streams as studied in this paper. However, knowledge on how stormwater outlets from wet ponds may affect downstream recipients is still limited. We studied the impact of six outlets from wet stormwater ponds to streams in 2016 and 2017, by measurements in the streams upstream and downstream of the outlet. The aim was to study possible effects on physical conditions, sediment grain size and invertebrate community composition. The Fauna Index showed no significant differences between upstream and downstream stations. However, we found a significant decrease in biodiversity (Shannon-Wiener) and a significantly lower evenness downstream of the stormwater outlets, even though the water was delayed and treated in a pond first. The physical conditions were both positively and negatively affected depending on the specific outlet. Finally, the smallest particle fraction (<63 μm) in the stream sediments was reduced at downstream sites compared to upstream sites at four outlets indicating possible erosion effects. Our study shows that the stormwater outlets have an effect on the recipients, but whether it is measurable depends on the methods utilized.",
keywords = "Hydraulic load, Invertebrates, Rainwater, SUDS, Urban runoff, Water management",
author = "Lukasz Koziel and Mette Juhl and Sara Egemose",
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Effects on biodiversity, physical conditions and sediment in streams receiving stormwater discharge treated and delayed in wet ponds. / Koziel, Lukasz; Juhl, Mette; Egemose, Sara.

I: Limnologica, Bind 75, 03.2019, s. 11-18.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Effects on biodiversity, physical conditions and sediment in streams receiving stormwater discharge treated and delayed in wet ponds

AU - Koziel, Lukasz

AU - Juhl, Mette

AU - Egemose, Sara

PY - 2019/3

Y1 - 2019/3

N2 - The impact of human activities on watercourses has led to increased contamination, eutrophication, erosion and reduced biodiversity in streams and rivers. Increased urbanization is one of the factors that may influence the water quality. Wet stormwater ponds are a commonly used buffer structure to delay and treat the water before it reaches the recipient – often streams as studied in this paper. However, knowledge on how stormwater outlets from wet ponds may affect downstream recipients is still limited. We studied the impact of six outlets from wet stormwater ponds to streams in 2016 and 2017, by measurements in the streams upstream and downstream of the outlet. The aim was to study possible effects on physical conditions, sediment grain size and invertebrate community composition. The Fauna Index showed no significant differences between upstream and downstream stations. However, we found a significant decrease in biodiversity (Shannon-Wiener) and a significantly lower evenness downstream of the stormwater outlets, even though the water was delayed and treated in a pond first. The physical conditions were both positively and negatively affected depending on the specific outlet. Finally, the smallest particle fraction (<63 μm) in the stream sediments was reduced at downstream sites compared to upstream sites at four outlets indicating possible erosion effects. Our study shows that the stormwater outlets have an effect on the recipients, but whether it is measurable depends on the methods utilized.

AB - The impact of human activities on watercourses has led to increased contamination, eutrophication, erosion and reduced biodiversity in streams and rivers. Increased urbanization is one of the factors that may influence the water quality. Wet stormwater ponds are a commonly used buffer structure to delay and treat the water before it reaches the recipient – often streams as studied in this paper. However, knowledge on how stormwater outlets from wet ponds may affect downstream recipients is still limited. We studied the impact of six outlets from wet stormwater ponds to streams in 2016 and 2017, by measurements in the streams upstream and downstream of the outlet. The aim was to study possible effects on physical conditions, sediment grain size and invertebrate community composition. The Fauna Index showed no significant differences between upstream and downstream stations. However, we found a significant decrease in biodiversity (Shannon-Wiener) and a significantly lower evenness downstream of the stormwater outlets, even though the water was delayed and treated in a pond first. The physical conditions were both positively and negatively affected depending on the specific outlet. Finally, the smallest particle fraction (<63 μm) in the stream sediments was reduced at downstream sites compared to upstream sites at four outlets indicating possible erosion effects. Our study shows that the stormwater outlets have an effect on the recipients, but whether it is measurable depends on the methods utilized.

KW - Hydraulic load

KW - Invertebrates

KW - Rainwater

KW - SUDS

KW - Urban runoff

KW - Water management

U2 - 10.1016/j.limno.2019.01.001

DO - 10.1016/j.limno.2019.01.001

M3 - Journal article

AN - SCOPUS:85060107635

VL - 75

SP - 11

EP - 18

JO - Limnologica

JF - Limnologica

SN - 0075-9511

ER -