Development of a Turbidity Prediction Methodology for Runoff–Erosion Models

Neupane, Sagar; Vogel, Jason R.; Storm, Daniel E.; Barfield, B. J.; Mittelstet, Aaron R.

doi:10.1007/s11270-015-2679-9

“…However, it is believed that excessive sediment deposition causes failure of some structures because it leads to a loss of channel capacity and subsequent change in the stable dimension, pattern and profile of the river [7].…”

Section: Depositionmentioning

confidence: 99%

“…The excess sediment affects the water chemistry, aquatic organisms, and the water clarity in our streams and reservoirs. Excess sediment is aesthetically displeasing, increases the cost of treating drinking water, decreases water clarity, and has an overall negative impact on the aquatic ecosystem [4][5][6][7][8]. The increased turbidity not only affects the water aesthetics but also reduces photosynthesis and organisms' visibility.…”

Section: Introductionmentioning

confidence: 99%

Quantifying Effectiveness of Streambank Stabilization Practices on Cedar River, Nebraska

Davé

¹

,

Mittelstet

²

2017

Water

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Excessive sediment is a major pollutant to surface waters worldwide. In some watersheds, streambanks are a significant source of this sediment, leading to the expenditure of billions of dollars in stabilization projects. Although costly streambank stabilization projects have been implemented worldwide, long-term monitoring to quantify their success is lacking. There is a critical need to document the long-term success of streambank restoration projects. The objectives of this research were to (1) quantify streambank retreat before and after the stabilization of 18 streambanks on the Cedar River in North Central Nebraska, USA; (2) assess the impact of a large flood event; and (3) determine the most cost-efficient stabilization practice. The stabilized streambanks included jetties (10), rock-toe protection (1), slope reduction/gravel bank (1), a retaining wall (1), rock vanes (2), and tree revetments (3). Streambank retreat and accumulation were quantified using aerial images from 1993 to 2016. Though streambank retreat has been significant throughout the study period, a breached dam in 2010 caused major flooding and streambank erosion on the Cedar River. This large-scale flood enabled us to quantify the effect of one extreme event and evaluate the effectiveness of the stabilized streambanks. With a 70% success rate, jetties were the most cost-efficient practice and yielded the most deposition. If minimal risk is unacceptable, a more costly yet immobile practice such as a gravel bank or retaining wall is recommended.

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“…The control site for jetties had less accumulation (0.51 m 2 m −1 year −1 ) than the stabilized banks (0.99 m 2 m −1 year −1 ) during the flood, which shows a very efficient sediment capture. However, it is believed that excessive sediment deposition causes failure of some structures because it leads to a loss of channel capacity and subsequent change in the stable dimension, pattern and profile of the river [7].…”

Section: Depositionmentioning

confidence: 99%

Quantifying Effectiveness of Streambank Stabilization Practices on Cedar River, Nebraska

Davé

¹

,

Mittelstet²

2017

2017 Spokane, Washington July 16 - July 19, 2017

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Excessive sediment is a major pollutant to surface waters worldwide. In some watersheds, streambanks are a significant source of this sediment, leading to the expenditure of billions of dollars in stabilization projects. Although costly streambank stabilization projects have been implemented worldwide, long-term monitoring to quantify their success is lacking. There is a critical need to document the long-term success of streambank restoration projects. The objectives of this research were to (1) quantify streambank retreat before and after the stabilization of 18 streambanks on the Cedar River in North Central Nebraska, USA; (2) assess the impact of a large flood event; and (3) determine the most cost-efficient stabilization practice. The stabilized streambanks included jetties (10), rock-toe protection (1), slope reduction/gravel bank (1), a retaining wall (1), rock vanes (2), and tree revetments (3). Streambank retreat and accumulation were quantified using aerial images from 1993 to 2016. Though streambank retreat has been significant throughout the study period, a breached dam in 2010 caused major flooding and streambank erosion on the Cedar River. This large-scale flood enabled us to quantify the effect of one extreme event and evaluate the effectiveness of the stabilized streambanks. With a 70% success rate, jetties were the most cost-efficient practice and yielded the most deposition. If minimal risk is unacceptable, a more costly yet immobile practice such as a gravel bank or retaining wall is recommended.

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“…Finally, Wijesiri et al (2015) explores a methodology for incorporating the variability of the particle size distribution in stormwater washoff into stormwater quality models. Neupane et al (2015) also developed a predictive relationship between suspended sediment concentration (SSC) in particle-size classes and turbidity that can be applied to stormwater runoff from any homogeneous sediment source.…”

Section: Stormwater Quantitymentioning

confidence: 99%

Urban Stormwater Characterization, Control, and Treatment

Vogel

¹

,

Moore²

2016

Water Environment Research

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The following review presents a synthesis of 181 journal articles published during 2015 that represent progress toward better characterizing, controlling, and treating urban stormwater runoff. The review is structured by general topical areas related to (1) stormwater quality and quantity characterization; (2) engineered stormwater control and treatment practices, including erosion and sediment control, stormwater ponds, constructed stormwater wetlands, bioretention, permeable pavement, greenroofs, and rainwater harvesting systems; and (3) watershed-scale modeling and optimization of stormwater control and treatment practices. Common research themes emerging from this collection of studies include potential to enhance hydrologic and pollutant treatment performance of stormwater practices via media amendments and the use of innovative outlet control structures, as well as development of a more mechanistic understanding of hydrologic and water-quality functions to inform modeling and performance predictions. These studies serve to expand the field's knowledge base and will inform future efforts to further improve stormwater control and treatment at various spatial and temporal scales.

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Development of a Turbidity Prediction Methodology for Runoff–Erosion Models

Cited by 10 publications

References 40 publications

Quantifying Effectiveness of Streambank Stabilization Practices on Cedar River, Nebraska

Quantifying Effectiveness of Streambank Stabilization Practices on Cedar River, Nebraska

Quantifying Effectiveness of Streambank Stabilization Practices on Cedar River, Nebraska

Urban Stormwater Characterization, Control, and Treatment

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