Modelling the washoff of pollutants in various forms from an urban catchment.

08:00 EDT 10th June 2019 | BioPortfolio

Summary of "Modelling the washoff of pollutants in various forms from an urban catchment."

The exponential washoff model was originally developed based on observations of particulate pollutants, however, its applicability when applied to different forms of pollutants is not well understood. Data from a previous study of 6 stormwater pollutants from 126 events at 12 sites in Singapore was used for event based model parameter calibration using a Monte Carlo technique. The accuracy of the calibrated exponential washoff model was clearly best for particulate pollutant total suspended solids (TSS), and worst for dissolved pollutants Ortho-Phosphate (PO), nitrate (NO) and ammonium-nitrogen (NH). Model accuracy for mixed forms of pollutants total Phosphorus (TP) and total Nitrogen (TN) were in between these two extremes. Relationships between model parameters with rainfall and flow characteristics were also investigated. Statistically significant relationships could only be found for TSS, where the total rainfall depth was identified as being the most significant variable to explain model parameter behaviour. Antecedent dry period (ADP) was shown to have little or no importance across all land uses and pollutant forms. The results showed that the model parameter behaviour could be explained only for particulate pollutants and small (≤10 ha) sub-catchments, and that replicating washoff of mixed or dissolved forms of pollutants as a fraction of solids is likely to lead to misleading results.


Journal Details

This article was published in the following journal.

Name: Journal of environmental management
ISSN: 1095-8630
Pages: 374-383


DeepDyve research library

PubMed Articles [5928 Associated PubMed Articles listed on BioPortfolio]

Interrelationship among the pollutants in stormwater in an urban catchment and first flush identification using UV spectroscopy.

Assessing urban stormwater quality by investigation and characterisation of pollutants is a prerequisite for its effective management, for reuse and safe discharge. The stochastic nature of rainfall, ...

Modelling micropollutant fate in sewer systems - A new systematic approach to support conceptual model construction based on in-sewer hydraulic retention time.

Conceptual sewer models are useful tools to assess the fate of micropollutants (MPs) in integrated wastewater systems. However, the definition of their model structure is highly subjective, and obtain...

Understanding spatiotemporal variability of in-stream water quality in urban environments - A case study of Melbourne, Australia.

To support sustainable urban planning and the design of water pollution mitigation strategies, the spatial and temporal trends of water quality in urban streams needs to be further understood. This st...

Innovative combination of tracing methods to differentiate between legacy and contemporary PAH sources in the atmosphere-soil-river continuum in an urban catchment (Orge River, France).

Polycyclic aromatic hydrocarbons (PAH) have been released by human activities during more than a century, contaminating the entire atmosphere - soil - river continuum. Due to their ubiquity in the env...

Assessment of stormwater pollutant loads and source area contributions with storm water management model (SWMM).

Decentralized urban runoff management requires detailed information about pollutant sources and pathways. However, scarce data of local water quality compel simplified approaches in water quality mode...

Clinical Trials [1389 Associated Clinical Trials listed on BioPortfolio]

Air Pollution, Asthma and Circadian Clocks

Societies become increasingly urban - more than half the world's population now lives in cities. Urbanization elevates anthropogenic (man-made) exposure to air pollutants. A clear associat...

HIV Self-Testing Africa Zambia

This study consists of a Cluster Randomised Trial (CRT) of community and facility-based HIVST distribution by the Society for Family Health (SFH) in multiple rural and peri-urban settings....

The Impact of Air Filtration on Asthmatic Children

This study uses a crossover study design to examine the impact of a two-week bedroom based indoor air filtration on the concentration of indoor airborne pollutants, personal exposure to ai...

Evaluation of Image-Based Modelling on Clinical Decisions in Coarctation of the Aorta

To answer the research question: "Would image-based modelling result in different clinical decisions as compared to clinical practice guidelines?", we will conduct a randomized controlled ...

Associations Between Air Pollutants Exposures and Respiratory System Study

Epidemiological investigations has suggested exposure to air pollution linked with respiratory disease, especially chronic obstructive pulmonary disease. However, the potential mechanisms ...

Medical and Biotech [MESH] Definitions

The process whereby a society changes from a rural to an urban way of life. It refers also to the gradual increase in the proportion of people living in urban areas.

The planned upgrading of a deteriorating urban area, involving rebuilding, renovation, or restoration. It frequently refers to programs of major demolition and rebuilding of blighted areas.

Pollutants, present in air, which exhibit radioactivity.

The status of health in urban populations.

Air pollutants found in the work area. They are usually produced by the specific nature of the occupation.

Quick Search


DeepDyve research library

Searches Linking to this Article