scholarly journals Analysis of the Water Quality Characteristics of Urban Streams Using the Flow–Pollutant Loading Relationship and a Load Duration Curve (LDC)

2021 ◽  
Vol 11 (20) ◽  
pp. 9694
Author(s):  
Ji-Yun Jang ◽  
Dae-Woong Kim ◽  
Ye-Ji Choi ◽  
Dong-Woo Jang
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Quality Characteristics ◽  
Urban Streams ◽  
Pollution Sources ◽  
Urban Stream ◽  
Flow Index ◽  
Discharge Data ◽  
Flow Discharge ◽  
Pollutant Loading

For urban streams, wastewater inflow makes water quality management difficult. This study attempted to analyze the water quality characteristics and pollution sources for the efficient management of water quality in the upper, middle, and lower Gul-po stream reaches. The water quality and flow characteristics for each point were analyzed using five-year water quality and flow discharge data at Gul-po stream from 2016 to 2020. The results showed that the flow increased and the water quality improved in the upper part of the stream, under the influence of a treated water discharge. The flow–pollutant loading equation revealed that the flow coefficient (slope of the regression equation) values of the water quality characteristics, except T-N, were lower than 1 in the upper part, indicating that the water quality decreased as the flow increased. In the middle and lower parts, the flow index values of the water quality characteristics, except T-N, were greater than 1, indicating that the water quality increased with the flow. For the middle and lower parts, the overage rate of target water quality by the Ministry of Environment was high for high-flow discharge sections, indicating the significant influence of nonpoint pollution sources. These results show that it is necessary to consider different pollution sources at each point for urban stream quality management.

Development of water quality management strategies for the proposed isikli reservoir

1998 ◽  
Vol 37 (2) ◽  
pp. 369-376 ◽  
Author(s):  
Orhan Gündüz ◽  
Selçuk Soyupak ◽  
Coskun Yurteri
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Treatment Options ◽  
Water Quality Management ◽  
Management Strategies ◽  
Pollution Sources ◽  
Water Quality Standards ◽  
Quality Model ◽  
Control Techniques ◽  
Administrative Control

A two-dimensional laterally averaged hydrodynamic and water quality model (CE-QUAL-W2) is used to simulate the water quality behavior in the proposed Isikli Reservoir of the Ankara Water Supply System to determine appropriate strategies for the management of water quality. Isikli application of the model is used to demonstrate the potential water quality degradation patterns in the reservoir under different pollution loads. The results of the modeling study are compared with the drinking water quality standards currently effective in Turkey to formulate various water quality management strategies for the reservoir and its catchment area. In addition, various treatment options are evaluated considering the existing treatment system of Ankara City. Based on the findings of this study, treatment or interception of wastewaters originating from the existing pollution sources around the reservoir area are introduced as the major infrastructural control techniques. Further, establishment of protection zones around the reservoir and relocating the possible pollution sources to a point downstream of the dam axis are found to be the most applicable administrative control methods for water quality preservation in the proposed reservoir.

scholarly journals Taxon-Driven Functional Shifts Associated with Storm Flow in an Urban Stream Microbial Community

mSphere ◽  
2018 ◽  
Vol 3 (4) ◽  
Author(s):  
Adit Chaudhary ◽  
Imrose Kauser ◽  
Anirban Ray ◽  
Rachel Poretsky
Keyword(s):  
Public Health ◽  
Water Quality ◽  
Microbial Community ◽  
Microbial Community Composition ◽  
Urban Streams ◽  
Urban Stream ◽  
Flow Conditions ◽  
Shotgun Metagenomics ◽  
Storm Flow ◽  
The Impact

ABSTRACT Urban streams are susceptible to stormwater and sewage inputs that can impact their ecological health and water quality. Microbial communities in streams play important functional roles, and their composition and metabolic potential can help assess ecological state and water quality. Although these environments are highly heterogenous, little is known about the influence of isolated perturbations, such as those resulting from rain events on urban stream microbiota. Here, we examined the microbial community composition and diversity in an urban stream during dry and wet weather conditions with both 16S rRNA gene sequencing across multiple years and shotgun metagenomics to more deeply analyze a single storm flow event. Metagenomics was used to assess population-level dynamics as well as shifts in the microbial community taxonomic profile and functional potential before and after a substantial rainfall. The results demonstrated general trends present in the stream under storm flow versus base flow conditions and also highlighted the influence of increased effluent flow following rain in shifting the stream microbial community from abundant freshwater taxa to those more associated with urban/anthropogenic settings. Shifts in the taxonomic composition were also linked to changes in functional gene content, particularly for transmembrane transport and organic substance biosynthesis. We also observed an increase in relative abundance of genes encoding degradation of organic pollutants and antibiotic resistance after rain. Overall, this study highlighted some differences in the microbial community of an urban stream under storm flow conditions and showed the impact of a storm flow event on the microbiome from an environmental and public health perspective. IMPORTANCE Urban streams in various parts of the world are facing increased anthropogenic pressure on their water quality, and storm flow events represent one such source of complex physical, chemical, and biological perturbations. Microorganisms are important components of these streams from both ecological and public health perspectives. Analysis of the effect of perturbations on the stream microbial community can help improve current knowledge on the impact such chronic disturbances can have on these water resources. This study examines microbial community dynamics during rain-induced storm flow conditions in an urban stream of the Chicago Area Waterway System. Additionally, using shotgun metagenomics we identified significant shifts in the microbial community composition and functional gene content following a high-rainfall event, with potential environment and public health implications. Previous work in this area has focused on specific genes/organisms or has not assessed immediate storm flow impact.

scholarly journals Taxa-driven functional shifts associated with stormflow in an urban stream microbial community

2018 ◽  
Author(s):  
Adit Chaudhary ◽  
Imrose Kauser ◽  
Anirban Ray ◽  
Rachel Poretsky
Keyword(s):  
Public Health ◽  
Water Quality ◽  
Microbial Community ◽  
Community Composition ◽  
Microbial Community Composition ◽  
Urban Streams ◽  
Functional Gene ◽  
Gene Content ◽  
Urban Stream ◽  
Shotgun Metagenomics

AbstractUrban streams are susceptible to stormwater and sewage inputs that can impact their ecological health and water quality. Microbial communities in streams play important functional roles and their composition and metabolic potential can help assess ecological state and water quality. Although these environments are highly heterogenous, little is known about the influence of isolated perturbations, such as those resulting from rain events on urban stream microbiota. Here, we examined the microbial community composition and diversity in an urban stream during dry and wet weather conditions with both 16S rRNA gene sequencing across multiple years and shotgun metagenomics to more deeply analyze a single stormflow event. Metagenomics was used to assess population-level dynamics as well as shifts in the microbial community taxonomic profile and functional potential before and after a substantial rainfall. Results demonstrated general trends present in the stream under stormflow vs. baseflow conditions across years and seasons and also highlighted the significant influence of increased effluent flow following rain in shifting the stream microbial community from abundant freshwater taxa to those more associated with urban/anthropogenic settings. Shifts in the taxonomic composition were also linked to changes in functional gene content, particularly for transmembrane transport and organic substance biosynthesis. We also observed an increase in relative abundance of genes encoding degradation of organic pollutants and antibiotic resistance after rain. Overall, this study provided evidence of stormflow impacts on an urban stream microbiome from an environmental and public health perspective.ImportanceUrban streams in various parts of the world are facing increased anthropogenic pressure on their water quality, and stormflow events represent one such source of complex physical, chemical and biological perturbations. Microorganisms are important components of these streams from both ecological and public-health perspectives, and analyzing the effect of such perturbations on the stream microbial community can help improve current knowledge on the impact such chronic disturbances can have on these water resources. This study examines microbial community dynamics during rain-induced stormflow conditions in an urban stream of the Chicago Area Waterway System. Additionally, using shotgun metagenomics we identified significant shifts in the microbial community composition and functional gene content following a high rainfall event, with potential environment and public health implications. Previous work in this area has been limited to specific genes/organisms or has not assessed immediate stormflow impact.

The effects of de-icing in Helsinki urban streams, Southern Finland

2003 ◽  
Vol 48 (9) ◽  
pp. 33-43 ◽  
Author(s):  
O. Ruth
Keyword(s):  
Water Quality ◽  
Urban Areas ◽  
Stream Water ◽  
Road Salt ◽  
Urban Streams ◽  
Urban Stream ◽  
Road Maintenance ◽  
Spring Flood ◽  
Natural Streams ◽  
Flood Period

The environmental effects of road salt have been studied in Finland mainly in order to monitor and reduce groundwater contamination. In urban areas the road salt used for road maintenance in winter ends up in the storm water drains and receiving water bodies. We report here on water samples taken in 1998-1999 from three urban streams with catchments varying in area 1.7 to 24.4 km2 in different parts of the City of Helsinki. Despite efforts to reduce the amount of road salt, high concentrations were found in the urban stream water. Sudden variations in water quality were very marked during the spring flood period, with sodium and chloride concentrations varying over nine-fold within one day. Some 35-50% of the salt used on the roads in Helsinki passes into natural streams and from there into the sea. The significant positive correlation between NaCl and dissolved zinc in stream water was observed. The results show that it is important to monitor water quality, especially at the beginning of the spring flood period, when road salt and other contaminant levels are markedly high in urban streams.

scholarly journals Analysis of physicochemical water quality parameters for streams under agricultural, urban and forest land-use types: in the case of gilgel Gibe catchment, Southwest Ethiopia

2020 ◽  
Vol 10 (11) ◽  
Author(s):  
Berhanu Zawude Bakure ◽  
Samuel Fikadu ◽  
Asgdom Malu
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Physicochemical Parameters ◽  
Sampling Site ◽  
Quality Parameters ◽  
Urban Streams ◽  
Urban Stream ◽  
Land Use Types ◽  
Agricultural Streams ◽  
One Way Anova

Abstract Streams draining to Gilgel Gibe catchment cross agricultural and urban land uses receiving a different pollutant that challenges water quality. A total of 21 sampling sites were selected from seven streams of agricultural (n = 3), urban (n = 3) and forest (n = 1) land-use types. Composite samples were collected from upstream, middle and downstream of all land-use types. Twenty-three physicochemical parameters were measured from each sampling site. Temperature, DO, pH, EC, turbidity, width, depth, current velocity and discharge were measured onsite. Two milliliters of unfiltered water samples was collected from every site for laboratory analysis. Mean of NO3-N was highest in agricultural streams than forested and urban streams. In contrast, mean of SRP, NH4-N and COD and BOD5 concentration was greater in urban streams followed by agricultural streams, whereas forest streams are lowest. Concentrations of nutrients, EC and turbidity were recorded in increasing manner across land-use gradient from forested to agricultural and urban streams. The analysis of one-way ANOVA showed that all physicochemical parameters were significantly different among all sites with different land-use types (P < 0.05), except for water temperature (one-way ANOVA: F = 0.987, P = 0.494). NMDS and cluster analyses have discriminated the sites into three groups of land-use types. Then, we conclude that water quality of urban stream is highly impaired than agricultural streams, whereas forested streams have better water quality. Therefore, stream restoration projects, reforestation, conservation of riparian vegetation appropriate waste disposal need to be encouraged in the study area for sustainable management of freshwater resources.

Water quality evaluation of two urban streams in Northwest Uruguay: are national regulations for urban stream quality sufficient?

2020 ◽  
Vol 192 (10) ◽  
Author(s):  
Elena Alvareda ◽  
Christine Lucas ◽  
Mercedes Paradiso ◽  
Adriana Piperno ◽  
Pablo Gamazo ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Evaluation ◽  
Urban Streams ◽  
Urban Stream ◽  
Water Quality Evaluation ◽  
Stream Quality
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