SSUIS – a research model for predicting suspended solids loads in stormwater runoff from urban impervious surfaces

2012 ◽  
Vol 65 (12) ◽  
pp. 2140-2147
Author(s):  
Ian M. Brodie
Keyword(s):  
Suspended Solids ◽  
Stormwater Runoff ◽  
Source Area ◽  
Storm Event ◽  
Impervious Surfaces ◽  
Research Model ◽  
Treatment Efficiency ◽  
Particle Accumulation ◽  
Car Park ◽  
Urban Impervious Surfaces

Suspended solids from urban impervious surfaces (SSUIS) is a spreadsheet-based model that predicts the mass loading of suspended solids (SS) in stormwater runoff generated from impervious urban surfaces. The model is intended to be a research tool and incorporates several particle accumulation and washoff processes. Development of SSUIS is based on interpretation of storm event data obtained from a galvanised iron roof, a concrete car park and a bitumen road located in Toowoomba, Australia. SSUIS is a source area model that tracks the particle mass balance on the impervious surface and within its lateral drain to a point of discharge. Particles are separated into two groups: free and detained, depending on the rainfall energy required for surface washoff. Calibration and verification of SSUIS against the Toowoomba SS data yielded R2 values ranging from 0.60 to 0.98. Parameter sensitivity analysis and an example of how SSUIS can be applied to predict the treatment efficiency of a grass swale are also provided.

Use of a Biofilter for Treatment of Heavy Metals in Highway Runoff

2000 ◽  
Vol 35 (3) ◽  
pp. 563-312 ◽  
Author(s):  
Y.L. Lau ◽  
J. Marsalek ◽  
Q. Rochfort
Keyword(s):  
Heavy Metals ◽  
Effective Treatment ◽  
Laboratory Testing ◽  
Suspended Solids ◽  
Stormwater Runoff ◽  
Field Scale ◽  
Treatment Efficiency ◽  
Dissolved Metals ◽  
Highway Runoff ◽  
Cu And Zn

Abstract Effective treatment of Stormwater by laboratory-scale biofilters has demonstrated that these simple filters may be used to remove dissolved metals and sediment-adsorbed metals found in Stormwater runoff. Laboratory testing indicated that even biofilm just 3 days old provided suspended solids and heavy metals removals in excess of 90%. A filter operated for 9 weeks retained its treatment efficiency and removed more than 90% of total Cu and Zn. Field-scale testing is recommended.

Build-up and characterisation of pollutants on urban impervious surfaces

2018 ◽  
Vol 77 (8) ◽  
pp. 2123-2133
Author(s):  
Aleksandar Djukić ◽  
Branislava Lekić ◽  
Vladana Rajaković-Ognjanović ◽  
Zorana Naunovic ◽  
Dušan Prodanović
Keyword(s):  
Heavy Metals ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Vehicular Traffic ◽  
Impervious Surfaces ◽  
Power Functions ◽  
Parking Lot ◽  
Iron And Zinc ◽  
The Difference ◽  
Urban Impervious Surfaces

Abstract This paper presents the results of the investigation of pollutant build-up on impervious surfaces of a parking lot in Belgrade, Serbia during the summer months. Contaminant build-up was found to be greater on asphalt surfaces directly exposed to vehicular traffic than on concrete walkways. The difference in the amounts of accumulated pollutants between asphalt and concrete were significant: for total solids (TS), total suspended solids (TSS), chemical oxygen demand (COD), heavy metals and total phosphorus (TP) accumulations were two to three times higher, while only 30% higher for total nitrogen (TN) and anions. Build-up of most of the measured parameters was best described by power functions. The highest surface loads were found for solids, COD, iron and zinc. A strong correlation was found between turbidity, TS, TSS, COD, heavy metals and phosphorus, while conductivity, nitrates and nitrites were weakly correlated to other parameters.

The toxicity and chemical composition of urban stormwater runoff

1988 ◽  
Vol 15 (1) ◽  
pp. 98-106 ◽  
Author(s):  
Ken J. Hall ◽  
Bruce C. Anderson
Keyword(s):  
Land Use ◽  
Chemical Composition ◽  
Trace Metals ◽  
Suspended Solids ◽  
Stormwater Runoff ◽  
Test Organism ◽  
Storm Event ◽  
Urban Stormwater ◽  
Field Samples ◽  
Urban Stormwater Runoff

The effects of land use on the chemical composition of urban stormwater runoff and its subsequent acute toxicity to the aquatic invertebrate Daphnia pulex have been investigated in the Brunette drainage basin of Burnaby, British Columbia. Both land use and interval between rainfall events influenced the chemical composition and toxicity of the stormwater. The industrial and commercial land use sites were the major source of those trace metals most often considered toxic to aquatic invertebrates, with runoff from the commercial sites proving most frequently toxic to the test organism. Toxicity followed the sequence commercial > industrial > residential > open space. A detailed study of a single storm event indicated that while the “first-flush” of the storm contributed to toxicity—through the physical scouring of insoluble pollutants—some soluble pollutants, which were washed out of the watershed later in the storm event, also proved to be toxic. This finding has implications for the collection and treatment of stormwater runoff. Laboratory bioassays with synthetic stormwater composed of the trace metals Cu, Fe, Pb, and Zn at concentrations observed in field samples demonstrated that pH and suspended solids helped to regulate the toxicity of trace metals, and implicated the importance of these factors in natural stormwater toxicity. Key words: stormwater, street surface sediments, land use, buildup time, trace metals, toxicity, Daphnia bioassays, pH, suspended solids effects.

scholarly journals URBAN IMPERVIOUS SURFACE EXTRACTION BASED ON REMOTE SENSING IMAGES

2020 ◽  
Vol XLII-3/W10 ◽  
pp. 357-360
Author(s):  
X. Y. Long ◽  
Z. F. Shao ◽  
X. X. Feng
Keyword(s):  
Rapid Development ◽  
Impervious Surface ◽  
Support Vector ◽  
Impervious Surfaces ◽  
Surface Distribution ◽  
Human Environment ◽  
Important Indicator ◽  
Urbanization Level ◽  
Urban Impervious Surfaces

Abstract. Urban planning and constructions affect spatial patterns of urban impervious surfaces, which in turn modify the urban environment and affect human-environment interactions. Impervious surfaces can redistribute precipitation patterns, and the perviousness–imperviousness ratio is considered as one important indicator for assessing the degree of urbanization and the quality of urban eco-environment. The spatial distribution and dynamics of impervious surfaces contribute to better understand urbanization and its impacts on regional or urban hydrological environment, surface temperature balance and biodiversity, etc. Hengqin new area is located in Hengqin island, south of Zhuhai city, adjacent to Hong Kong and Macao. It was officially established as a free trade zone in 2009. Due to the rapid development of Hengqin in recent years, this paper discusses Landsat8 imagery of time series in mapping impervious surfaces, and analysis the changes of impervious surface in Hengqin from 2013 to 2018. Support vector machine (SVM) is a classical classifier that is supervised learning models and that use related learning algorithms to analyze data for classification and regression analysis (Vapnik, 1995). In this paper, we obtain the impervious surface distribution via SVM and get good accuracy. The impervious surface distribution of Hengqin in six years show that the quickly improve of urbanization level. However, with the development of urbanization, the impervious surface has not changed dramatically, which shows that the decision-making of urban managers is correct. After the urbanization construction in Hengqin, it is still an ecological island.

scholarly journals Solids Removal Efficiency of a Sedimentation Tank in a Peri-Urban Catchment

2020 ◽  
Vol 12 (17) ◽  
pp. 7196 ◽  
Author(s):  
Salvatore Falco ◽  
Giuseppe Brunetti ◽  
Giovanna Grossi ◽  
Mario Maiolo ◽  
Michele Turco ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Surface Runoff ◽  
Suspended Solids ◽  
Southern Italy ◽  
Treatment Efficiency ◽  
Urban Catchment ◽  
Sedimentation Tank ◽  
Basin Surface ◽  
Different Grain Size ◽  
Solids Removal

At the outlet of the Vermicelli catchment—a peri-urban area located in the campus of University of Calabria (Cosenza, Southern Italy)—a sedimentation tank is located, aiming at collecting the basin surface runoff and improve its quality. First, experimental results of the treatment effects are here presented and analyzed. In addition, a monitoring campaign was conducted in order to characterize the particles transported by surface runoff and to determine the treatment efficiency of the tank. The analysis showed the presence of a pollutant load in the surface runoff of the Vermicelli basin and provided information on its particle-size distribution (PSD). Results were considered in terms of the treatment efficiency of the sedimentation tank, showing a good overall removal efficiency value, together with a high variability of the removal sedimentation efficiency. This variability is mainly due to the different grain size of the suspended solids and the characteristics of the rainfall event.

scholarly journals An Improved Model Based Detection of Urban Impervious Surfaces Using Multiple Features Extracted from ROSIS-3 Hyperspectral Images

2019 ◽  
Vol 11 (2) ◽  
pp. 136 ◽  
Author(s):  
Yuliang Wang ◽  
Huiyi Su ◽  
Mingshi Li
Keyword(s):  
Feature Extraction ◽  
Logistic Regression ◽  
Dimensionality Reduction ◽  
Spectral Feature ◽  
Hyperspectral Images ◽  
Nonlinear Dimensionality Reduction ◽  
Impervious Surfaces ◽  
Urban Impervious Surfaces ◽  
Improved Model ◽  
Logistic Regression Classifier

Hyperspectral images (HSIs) provide unique capabilities for urban impervious surfaces (UIS) extraction. This paper proposes a multi-feature extraction model (MFEM) for UIS detection from HSIs. The model is based on a nonlinear dimensionality reduction technique, t-distributed stochastic neighbor embedding (t-SNE), and the deep learning method convolutional deep belief networks (CDBNs). We improved the two methods to create a novel MFEM consisting of improved t-SNE, deep compression CDBNs (d-CDBNs), and a logistic regression classifier. The improved t-SNE method provides dimensionality reduction and spectral feature extraction from the original HSIs and the d-CDBNs algorithm extracts spatial feature and edges using the reduced dimensional datasets. Finally, the extracted features are combined into multi-feature for the impervious surface detection using the logistic regression classifier. After comparing with the commonly used methods, the current experimental results demonstrate that the proposed MFEM model provides better performance for UIS extraction and detection from HSIs.

scholarly journals Northeast Asian Dust Transport: A Case Study of a Dust Storm Event from 28 March to 2 April 2012

Atmosphere ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 69 ◽  
Author(s):  
Purevsuren Tsedendamba ◽  
Jugder Dulam ◽  
Kenji Baba ◽  
Katsuro Hagiwara ◽  
Jun Noda ◽  
...  
Keyword(s):  
Lower Layer ◽  
Northeast Asia ◽  
Source Area ◽  
Northern China ◽  
Storm Event ◽  
Dust Transport ◽  
Lidar Measurements ◽  
Dust Storm Event ◽  
Northeast Asian ◽  
The Vertical Distribution

The distribution and transport of windblown dust that occurred in Northeast Asia from 28 March to 2 April 2012 was investigated. Data of particulate matter less than 10 micrometers (PM10) near the surface and light detection and ranging (LiDAR) measurements from the ground up to 18 km were used in the study. A severe dust event originated over southern Mongolia and northern China on 28 March 2012, and the widespread dust moved from the source area southeastward toward Japan over several days. Windblown dust reached Japan after two days from the originating area. LiDAR measurements of the vertical distribution of the dust were one to two km thick in the lower layer of the atmosphere, and increased with the increasing distance from the source area.

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