Assessment of Wide River Characteristics Using an Acoustic Doppler Current Profiler

Kimiaghalam, Navid; Goharrokhi, Masoud; Clark, Shawn P.

doi:10.1061/(asce)he.1943-5584.0001447

Cited by 5 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Red River is a wide, open channel (Goharrokhi, ), and its suspended sediment load is mainly composed of clay‐ and silt‐sized particles (Kimiaghalam, Goharrokhi, & Clark, ). Some of the primary characteristics of the Red River during the ice‐free period are reported in Table (Goharrokhi, ; Kimiaghalam et al, ).…”

Section: Sampler Evaluationsupporting

confidence: 89%

“…This short duration and one-time field sampling were performed to provide additional insight into the ability of the sampler to collect representative samples as well as to evaluate a novel approach for measuring its MCE in the field. The Red River is a wide, open channel (Goharrokhi, 2015), and its suspended sediment load is mainly composed of clay-and silt-sized particles (Kimiaghalam, Goharrokhi, & Clark, 2016). Some of the primary characteristics of the Red River during the ice-free period are reported in Table 2 (Goharrokhi, 2015;Kimiaghalam et al, 2016).…”

Section: Field Evaluationmentioning

confidence: 99%

“…The Red River is a wide, open channel (Goharrokhi, 2015), and its suspended sediment load is mainly composed of clay-and silt-sized particles (Kimiaghalam, Goharrokhi, & Clark, 2016). Some of the primary characteristics of the Red River during the ice-free period are reported in Table 2 (Goharrokhi, 2015;Kimiaghalam et al, 2016). L buckets was carefully siphoned, and the settled sediments were then air dried and retained for subsequent analyses (for details, see Perks et al, 2014).…”

Section: Field Evaluationmentioning

confidence: 99%

See 2 more Smart Citations

Assessing issues associated with a time‐integrated fluvial fine sediment sampler

Goharrokhi

Pahlavan

Lobb

et al. 2019

Hydrological Processes

Self Cite

View full text Add to dashboard Cite

Collecting a representative time‐integrated sample of fluvial fine‐grained suspended sediment (<63 μm) is an important requirement for the understanding of environmental, geomorphological, and hydrological processes operating within watersheds. This study (a) characterized the hydrodynamic behaviour of a commonly used time‐integrated fine sediment sampler (TIFSS) using an acoustic Doppler velocimeter (ADV) in controlled laboratory conditions and (b) measured the mass collection efficiency (MCE) of the sampler by an acoustic Doppler current profiler under field conditions. The laboratory results indicated that the hydrodynamic evaluations associated with the original development of the TIFSS involved an underestimation of the inlet flow velocity of the sampler that results in a significant overestimation of the theoretical MCE. The ADV data illustrated that the ratio of the inlet flow velocity of the sampler to the ambient velocity was 87% and consequently, it can be assumed that a representative sample of the ambient fine suspended particles entered into the sampler. The field results showed that the particle size distribution of the sediment collected by the TIFSS was statistically similar to that for the ambient sediment in the Red River, Manitoba, Canada. The MCE of the TIFSS in the field trials appeared to be as low as 10%. Collecting a representative sample in the field was consistent with the previous findings that the TIFSS is a suitable sampler for the collection of a representative sample of sufficient mass (e.g., >1 g) for the investigation of the properties of fluvial fine‐grained suspended sediment. Hydrodynamic evaluation of the TIFSS under a wider range of hydraulic conditions is suggested to assess the performance of the sampler during high run‐off events.

show abstract

Section: Sampler Evaluationsupporting

confidence: 89%

Section: Field Evaluationmentioning

confidence: 99%

Section: Field Evaluationmentioning

confidence: 99%

See 1 more Smart Citation

Assessing issues associated with a time‐integrated fluvial fine sediment sampler

Goharrokhi

Pahlavan

Lobb

et al. 2019

Hydrological Processes

Self Cite

View full text Add to dashboard Cite

show abstract

“…Given the relatively recalcitrant nature of the compound, residence times in the Red River are likely too short for degradation processes to be appreciable in the river itself (Schottler et al, 1994). An approximate residence time of 30 days from river source to mouth (885 km) was calculated assuming a mean annual flow of 176 m 3 /s, depth of 4 m, and width of 130 m (Kimiaghalam et al, 2015). This equates to a residence time of approximately 7 days between Emerson and Selkirk (218 km).…”

Section: Pesticide Concentrations and Occurrencementioning

confidence: 99%

Inputs, source apportionment, and transboundary transport of pesticides and other polar organic contaminants along the lower Red River, Manitoba, Canada

Challis

Cuscito

Joudan

et al. 2018

Science of The Total Environment

View full text Add to dashboard Cite

The Red River originates in the U.S., drains into Lake Winnipeg, and is a significant pathway for nutrients. We investigate its role as a source for pesticides, pharmaceuticals, per- and polyfluoroalkyl substances (PFASs), and microbes bearing antibiotic resistance genes (ARGs). We delineate agricultural, urban, and rural land-use for organic contaminants to determine the extent of chemical transboundary riverine fluxes, and characterize levels and trends of organic contaminants and ARGs between spring and fall 2014 and 2015. The herbicide atrazine peaked at over 500 ng/L (14-day time-weighted average) near the border, indicating that the U.S. represents the major source into Canada from the Red River. Neonicotinoid insecticides had relatively constant concentrations, suggesting more widespread agricultural use in both countries. Pesticide concentrations were greatest post-application in June and July. Mass loadings of pesticides over the sampling periods, from the river to Lake Winnipeg, ranged from approximately 800 kg of atrazine, to 120 kg of thiamethoxam and clothianidin, to 40 kg of imidacloprid. Exposure distributions for atrazine exceeded benchmark water quality guidelines for protection of aquatic life (0.2% probability of exceeding chronic benchmark) with no exceedances for neonicotinoids. Seven pharmaceuticals were detected, mostly at low ng/L levels downstream of the City of Winnipeg wastewater treatment plant. Carbamazepine, the only pharmaceutical detected consistently at all sites, contributed on average 20 kg each year into Lake Winnipeg. While minor inputs were observed all along the river, city inputs represented the greatest source of pharmaceuticals to the river. Both PFASs and ARGs were observed consistently and ubiquitously, indicative of an anthropogenically-influenced system with no indications of any single point-source signature. While transboundary flux from the U.S. was an important source of pesticides to the Red River, especially for atrazine, observed concentrations of all measured contaminants suggest that known aquatic toxicological risk is minimal.

show abstract

“…large rivers) flow velocity can be measured with current metres or acoustic Doppler techniques, such as acoustic Doppler velocimetry (ADV) or acoustic Doppler current profiler (ADCP), at determined monitoring sections (e.g. Muste et al, 2004a,b;Kimiaghalam et al, 2016). Although intrusive, these techniques do provide a reliable characterization of the flow velocity vertical profile; however, these instruments cannot always be used in very shallow water.…”

Section: Introductionmentioning

confidence: 99%

Comparison of thermal, salt and dye tracing to estimate shallow flow velocities: Novel triple-tracer approach

Abrantes

Moruzzi

Silveira

et al. 2018

Journal of Hydrology

View full text Add to dashboard Cite

The accurate measurement of shallow flow velocities is crucial to understand and model the dynamics of sediment and pollutant transport by overland flow. In this study, a novel triple-tracer approach was used to re-evaluate and compare the traditional and well established dye and salt tracer techniques with the more recent thermal tracer technique in estimating shallow flow velocities. For this purpose a triple tracer (i.e. dyed-salted-heated water) was used. Optical and infrared video cameras and an electrical conductivity sensor were used to detect the tracers in the flow. Leading edge and centroid velocities of the tracers were measured and the correction factors used to determine the actual mean flow velocities from tracer measured velocities were compared and investigated. Experiments were carried out for different flow discharges (32-1813 ml s À1) on smooth acrylic, sand, stones and synthetic grass bed surfaces with 0.8, 4.4 and 13.2% slopes. The results showed that thermal tracers can be used to estimate shallow flow velocities, since the three techniques yielded very similar results without significant differences between them. The main advantages of the thermal tracer were that the movement of the tracer along the measuring section was more easily visible than it was in the real image videos and that it was possible to measure space-averaged flow velocities instead of only one velocity value, with the salt tracer. The correction factors used to determine the actual mean velocity of overland flow varied directly with Reynolds and Froude numbers, flow velocity and slope and inversely with flow depth and bed roughness. In shallow flows, velocity estimation using tracers entails considerable uncertainty and caution must be taken with these measurements, especially in field studies where these variables vary appreciably in space and time.

show abstract

Assessment of Wide River Characteristics Using an Acoustic Doppler Current Profiler

Cited by 5 publications

References 21 publications

Assessing issues associated with a time‐integrated fluvial fine sediment sampler

Assessing issues associated with a time‐integrated fluvial fine sediment sampler

Inputs, source apportionment, and transboundary transport of pesticides and other polar organic contaminants along the lower Red River, Manitoba, Canada

Comparison of thermal, salt and dye tracing to estimate shallow flow velocities: Novel triple-tracer approach

Contact Info

Product

Resources

About