Modelling impacts of pollution in river systems: a new dispersion model and a case study of mine discharges in the Abrud, Aries and Mures River System in Transylvania, Romania

2009 ◽  
Vol 40 (2-3) ◽  
pp. 306-322 ◽  
Author(s):  
S. C. Chapra ◽  
P. G. Whitehead
Keyword(s):  
River Flow ◽  
Dispersion Model ◽  
River System ◽  
Order Kinetic ◽  
River Systems ◽  
Water Release ◽  
Pollution Levels ◽  
Key Sites ◽  
The Impact

A new model of dispersion has been developed to simulate the impact of pollutant discharges on river systems. The model accounts for the main dispersion processes operating in rivers as well as the dilution from incoming tributaries and first-order kinetic decay processes. The model is dynamic and simulates the hourly behaviour of river flow and pollutants along river systems. The model has been applied to the Aries and Mures River System in Romania and has been used to assess the impacts of potential dam releases from the Roşia Montană Mine in Transylvania, Romania. The question of mine water release is investigated under a range of scenarios. The impacts on pollution levels downstream at key sites and at the border with Hungary are investigated.

scholarly journals A New Multibranch Model for Metals in River Systems: Impacts and Control of Tannery Wastes in Bangladesh

2021 ◽  
Vol 13 (6) ◽  
pp. 3556
Author(s):  
P. G. Whitehead ◽  
Z. Mimouni ◽  
D. Butterfield ◽  
G. Bussi ◽  
M. A. Hossain ◽  
...  
Keyword(s):  
Acid Rock Drainage ◽  
Treatment Plant ◽  
River System ◽  
Point Sources ◽  
Effluent Treatment ◽  
River Systems ◽  
Acid Rock ◽  
Pollution Levels ◽  
Copper Zinc ◽  
The Impact

A new multibranch Integrated Catchment (INCA) model INCA-Metals has been developed to simulate the impact of tannery discharges on river systems. The model accounts for the key chemical reaction kinetic processes operating as well as sedimentation, resuspension, dilution, mixing and redistribution of pollutants in rivers downstream of tannery discharge points and for mine discharges or acid rock drainage sites. The model is dynamic and simulates the daily behaviour of hydrology and eight metals, including cadmium, mercury, copper, zinc, lead, arsenic, manganese and chromium, as well as cyanide and ammonia. The model is semi-distributed and can simulate catchments, tributaries and instream river behaviour. The model can also account for diffuse pollution from rural runoff as well as point sources from effluent and trade discharges. The model has been applied to the new Savar tannery complex on the Dhaleshwari River system in Bangladesh to assess the impacts on pollution levels in the river system and to evaluate a set of treatment scenarios for pollution control, particularly in the dry season. It is shown that the new effluent treatment plant at Savar needs to significantly improve its operation and treatment capability in order to alleviate metal pollution in the downstream Dhaleshwari River System and also protect the Meghna River System that falls in the Bay of Bengal.

A case study of noise pollution levels during the restrictions period due to COVID-19.

2021 ◽  
Vol 263 (6) ◽  
pp. 206-214
Author(s):  
David Montes-González ◽  
Juan Miguel Barrigón-Morillas ◽  
Ana Cristina Bejarano-Quintas ◽  
Manuel Parejo-Pizarro ◽  
Guillermo Rey-Gozalo ◽  
...  
Keyword(s):  
Noise Pollution ◽  
Urban Environments ◽  
Control Measures ◽  
Acoustic Measurements ◽  
Pollution Levels ◽  
The World ◽  
The Impact ◽  
The City

The pandemic of coronavirus disease (COVID-19) led to the need for drastic control measures around the world to reduce the impact on the health of the population. The confinement of people in their homes resulted in a significant reduction in human activity at every level (economic, social, industrial, etc.), which was reflected in a decrease in environmental pollution levels. Studying the evolution of parameters, such as the level of environmental noise caused by vehicle traffic in urban environments, makes it possible to assess the impact of this type of measure. This paper presents a case study of the acoustic situation in Cáceres (Spain) during the restriction period by means of long-term acoustic measurements at various points of the city.

scholarly journals Assessment of the Impact of CO, NOx and PM10 on Air Quality during Road Construction and Operation Phases

2020 ◽  
Vol 12 (24) ◽  
pp. 10549
Author(s):  
Marinella Giunta
Keyword(s):  
Air Quality ◽  
Comprehensive Evaluation ◽  
Dispersion Model ◽  
Road Construction ◽  
Air Emissions ◽  
Unpaved Road ◽  
The Road ◽  
The Impact ◽  
Co Concentrations

The road sector is one of the main sources of air emissions in the atmosphere during both construction and operation. The objective of the present paper is a comprehensive evaluation of the impact on air quality during the two main phases of life cycle of roads. In this case study of a motorway project, the emissions of the primary pollutants, CO, NOx, and PM10 are estimated, and the results showed that (i) CO and NOx pollutants released during both phases are comparable, while the emissions of PM10 are more significant in the construction phase; (ii) 85% of PM10 in construction is due to storage, transit on unpaved road, and crushing; (iii) the portals of the tunnel are the sites where there are higher concentrations of pollutants in operation; and (iv) the CO concentrations estimated by the dispersion model are strongly influenced by the topography.

scholarly journals Long-chain diols in rivers: distribution and potential biological sources

2018 ◽  
Vol 15 (13) ◽  
pp. 4147-4161 ◽  
Author(s):  
Julie Lattaud ◽  
Frédérique Kirkels ◽  
Francien Peterse ◽  
Chantal V. Freymond ◽  
Timothy I. Eglinton ◽  
...  
Keyword(s):  
River Flow ◽  
River System ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
River Systems ◽  
Eukaryotic Diversity ◽  
Fractional Abundance ◽  
Biological Sources ◽  
Rrna Gene Sequencing ◽  
Long Chain

Abstract. Long-chain diols (LCDs) occur widespread in marine environments and also in lakes and rivers. Transport of LCDs from rivers may impact the distribution of LCDs in coastal environments, however relatively little is known about the distribution and biological sources of LCDs in river systems. In this study, we investigated the distribution of LCDs in suspended particulate matter (SPM) of three river systems (Godavari, Danube, and Rhine) in relation with precipitation, temperature, and source catchments. The dominant long-chain diol is the C32 1,15-diol followed by the C30 1,15-diol in all studied river systems. In regions influenced by marine waters, such as delta systems, the fractional abundance of the C30 1,15-diol is substantially higher than in the river itself, suggesting different LCD producers in marine and freshwater environments. A change in the LCD distribution along the downstream transects of the rivers studied was not observed. However, an effect of river flow is observed; i.e., the concentration of the C32 1,15-diol is higher in stagnant waters such as reservoirs and during seasons with river low stands. A seasonal change in the LCD distribution was observed in the Rhine, likely due to a change in the producers. Eukaryotic diversity analysis by 18S rRNA gene sequencing of SPM from the Rhine showed extremely low abundances of sequences (i.e., < 0.32 % of total reads) related to known algal LCD producers. Furthermore, incubation of the river water with 13C-labeled bicarbonate did not result in 13C incorporation into LCDs. This indicates that the LCDs present are mainly of fossil origin in the fast-flowing part of the Rhine. Overall, our results suggest that the LCD producers in rivers predominantly reside in lakes or side ponds that are part of the river system.

Nitrogen Removal by River Systems of the Feng River Basin in China

2014 ◽  
Vol 1015 ◽  
pp. 631-634
Author(s):  
Jian Hui Zhi ◽  
Ai Zhong Ding ◽  
Shu Rong Zhang
Keyword(s):  
Water System ◽  
River System ◽  
Dry Season ◽  
River Network ◽  
Nitrogen Loading ◽  
Combined Processes ◽  
River Systems ◽  
N Removal ◽  
N Input ◽  
The Impact

As human activities continue to alter the global nitrogen cycle, the ability to predict the impact of increased nitrogen loading to river systems is becoming more and more important. Nitrogen retention is of particular interest because it is through its combined processes that local and downstream nitrogen concentrations are reduced. To determine the potential for N removed from Feng River network, we used stream chemistry and hydrogeo-morphology data from 17 stream and river sites to estimate NO3-–N removal in Feng River system of China. We used a N removal model to predict NO3-–N input and removal in December of 2011. NO3-–N input ranged from 0.06 to 20 kg km-1d-1in the Feng River system. Cumulative river network NO3-–N input was 446 ton year-1 in dry season in whole water system. NO3–N removal based on the model ranged from 0.04 to 4.2 kg km-1d-1 December of 2011 for Feng River. Cumulative river network NO3-–N removal predicted by the model was 58 ton year-1 in dry season. Proportional NO3–N removal (PNR) ranged from 0.2 to 0.6 in this time. PNR was negatively correlated with both stream orders.

scholarly journals Assessment of the Odour Quality of the Air Surrounding a Landfill Site: A Case Study

2021 ◽  
Vol 13 (4) ◽  
pp. 1713
Author(s):  
Łukasz Szałata ◽  
Jerzy Zwoździak ◽  
Milan Majerník ◽  
Anna Cierniak-Emerych ◽  
Malgorzata A. Jarossová ◽  
...  
Keyword(s):  
Air Quality ◽  
Dispersion Model ◽  
Landfill Site ◽  
Municipal Sewage ◽  
The Hours ◽  
The Impact ◽  
Modelling System ◽  
Roadside Ditch

In the present study, the authors assessed the odour quality of the air in the vicinity of a landfill site using a case study of a waste management plant that processes non-hazardous and inert waste as an example. An analysis of the impact of the facility under study on the odour quality of the air was performed based on a mathematical modelling system used to, among other things, assess the impact of investments in air quality both in Poland and worldwide. The most important element of the system is the puff dispersion model CALPUFF. In conclusion, the analysis of the plant’s odour impact clearly indicates a significant impact on the air quality in the studied area. The range of the impact may even reach up to 1.5 km; in the nearest locality, the odour perceptibility threshold may be exceeded for more than 3% of the hours in a year. However, taking into account the fact that the landfill is located within an agricultural area, the incidental odour impact in this area may also be associated with periods of intensive fertilization and a roadside ditch collecting municipal sewage from roadside households.

A case study of the Narmada River system in India with particular reference to the impact of dams on its ecology and fisheries

2017 ◽  
Vol 20 (1-2) ◽  
pp. 151-159 ◽  
Author(s):  
Utpal Bhaumik ◽  
M. K. Mukhopadhyay ◽  
N. P. Shrivastava ◽  
A. P. Sharma ◽  
S. N. Singh
Keyword(s):  
River System ◽  
Narmada River ◽  
The Impact

scholarly journals Air emission inventory and application TAPM-AERMOD models to study air quality from 34 ports in Ho Chi Minh City

2019 ◽  
Vol 2 (2) ◽  
pp. 97-106
Author(s):  
Khue Hoang Ngoc Vu ◽  
Thanh Thi Nguyet Pham ◽  
Bang Quoc Ho ◽  
Tam Thoai Nguyen ◽  
Hang Thi Thuy Nguyen
Keyword(s):  
Air Quality ◽  
Emission Inventory ◽  
Dispersion Model ◽  
Mekong Delta ◽  
Ho Chi Minh City ◽  
The South ◽  
Cargo Handling ◽  
Pollution Levels ◽  
Port Area ◽  
The Impact

The port system of Ho Chi Minh City including 34 ports, serves as the gateway to the South (including the South East and the Mekong Delta) in export and import activities. In which contribute a huge amount of pollutants to the atmosphere in Ho Chi Minh City. The objective of this study is to: (i) Calculating air emissions from ports system in Ho Chi Minh city using the SPDGIZ model which emits a large amount of air pollutants such as sulfur oxide (SOX), nitrogen oxide (NOX), fine dust (PM2.5, PM10), volatile organic compounds (VOC), carbon monoxide (CO) from large ships (Ocean going vessels - OGVs), towing ships (Harbor Crafts - HCs), cargo handling equipment (Cargo handling equipment - CHE) and other vehicles (Heavy trucks – HVs); (ii) Using dispersion model TAPM-AERMOD to assess the impact of port operations to air quality in surouding port area; (iii) Proposing abatement measures based on the results of simulation to reduce emissions/ air pollution levels. The results of emission inventory show that the total port emissions are largely NOX and SOX mainly from large ships (OGVs) and cargo handling equipment (CHE) due to the use of heavy oil and diesel which have high sulfur content. The results show that the time at which a mooring boat is the most time consuming (accounting for over 90% of total emissions from OGVs).

Decline and regional extirpation of freshwater mussels (Unionidae) in a small river system invaded by Dreissena polymorpha: the Rideau River, 1993–2000

2001 ◽  
Vol 79 (12) ◽  
pp. 2181-2191 ◽  
Author(s):  
André L Martel ◽  
Diane A Pathy ◽  
Jacqueline B Madill ◽  
Claude B Renaud ◽  
Stuart L Dean ◽  
...  
Keyword(s):  
Dreissena Polymorpha ◽  
Freshwater Mussels ◽  
Ecological Impact ◽  
Benthic Fauna ◽  
River System ◽  
Small River ◽  
River Systems ◽  
Long Term Study ◽  
The Impact ◽  
Rideau River

Data pertaining to the ecological impact of the exotic zebra mussel, Dreissena polymorpha, on benthic fauna in small river systems are scarce. We conducted a long-term study to assess the impacts of the D. polymorpha invasion in a small river system (100 km) in eastern Ontario during an 8-year period (1993–2000). A 30-km downstream section of the Rideau River was studied before and during rapid population growth of D. polymorpha in the area. During 1993–1995, D. polymorpha abundance on hard substrates increased by four to six orders of magnitude and remained high thereafter. A comparable temporal pattern of D. polymorpha abundance was observed on shells of live freshwater mussels (Unionidae). During peak fouling (1995–1997), mass ratios (mass of attached D. polymorpha / mass of live unionid host) ranged from 0.37 to 1.81. SCUBA-diving surveys (50-m transects) were conducted to examine the impact of D. polymorpha on native unionids in impounded river habitats. In 1993–1994, three unionid taxa were commonly found in 10-m2 quadrats sampled along transects: Elliptio complanata, Pyganodon grandis, and Lampsilis radiata. Overall, the mean density of unionids declined 5- to 8-fold from 1993 to 1997, coinciding with a rapid increase in D. polymorpha densities on unionids. By 1997, i.e., 4 years after fouling began, P. grandis and L. radiata had been extirpated from those sites, with only E. complanata remaining. By 2000, i.e., 7 years after fouling began, all three unionid taxa had been essentially extirpated from the 30-km section of the river, with only one live individual (E. complanata) collected during 10 extensive diving surveys (the total estimated area of riverbed surveyed was 4000 m2). This study indicates that heavy fouling by D. polymorpha causes the extirpation of unionids in small impounded river systems ([Formula: see text]100 km).

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