river pollution Articles

223 Results found
  • Category: Water & Wastewater ×

  • Subcategory: Water Resources ×

  • Keyword: river pollution ×

Assessment of heavy metal pollution in stream sediments for the Baoji City section of the Weihe River in Northwest China

by IWA Publishing  (Oct. 20, 2014)

The concentrations of Pb, Zn, Cu, Cd and Cr in the stream sediment in the Baoji City section of the Weihe River, Northwest China, were determined to evaluate their contamination levels, spatial distribution and potential ecological risk. The average concentrations of the heavy metal sediments were 52.92 mg kg−1 for Pb, 99.04 mg kg−1 ...

Restoring environmental flow: buy-back costs and pollution-dilution as a compliance with water quality standards

by IWA Publishing  (Oct. 20, 2014)

An important challenge for policymakers worldwide is how to respond to increasing water demand while still assuring healthy ecosystems via ‘environmental flows’. In the case of Chile, increasing water demand and frequent water supply shortages are putting pressure on ecosystem water requirements. On the other hand, new environmental ...

PAH analysis and forensic mapping in sediments on Grand Calumet River

by Sitelab Corporation  (Jun. 4, 2014)

DREDGE SITE: Sitelab Corporation was hired by an environmental contractor to analyze 100 sediment samples collected from a post-dredge area covering a 1 mile stretch of river in Hammond, Indiana.  The data was used to determine which of the 25 sample locations would require further assessment.     “We evaluated ...

Effects of air pollution on European ecosystems - Past and future exposure of European freshwater and terrestrial habitats to acidifying and eutrophying air pollutants

by European Environment Agency (EEA)  (Jun. 30, 2014)

Poor air quality not only harms human health; it also impacts the structure and function of ecosystems, often far away from the emission sources. This report focuses on the deposition of airborne sulphur (S) and nitrogen (N) compounds and their negative effects on ecosystems. N- and S-containing air pollutants are released to the atmosphere by ...

Effect of different meteorological fields on the regional air quality modelling over Pearl River Delta, China

by Inderscience Publishers  (Jan. 23, 2014)

This study evaluates the performances of three Community Multiscale Air Quality (CMAQ) model v5.0 simulations that utilise meteorological input data from the 5th-generation Mesoscale Model (MM5), the Weather Research and Forecasting (WRF) model and WRF with Four-Dimensional Data Assimilation (WRF/FDDA). Three sets of CMAQ model simulations were ...

Water quality assessment of a polluted urban river

by Inderscience Publishers  (Oct. 7, 2013)

Urban rivers in Latin America are heavily impacted by human activities that affect their functions and services. This paper shows the results of a water quality assessment for the Reconquista River, the second most polluted urban river in Argentina. They allowed the identification of the main processes of transport of pollutants and the ...

Automatic control of pollutant on a shallow river using surface water systems: application to the Ebro River

by IWA Publishing  (Jun. 5, 2014)

In this paper, the problem of automatic control of pollutant on a shallow river using surface water systems is addressed using a benchmark test case based in the Ebro River. The Ebro River presents flooding episodes in the city of Zaragoza in Spring when snow melts in the Pyrenees. To avoid flooding and high pollutant levels in living areas, some ...

Model evaluation of faecal contamination in coastal areas affected by urban rivers receiving combined sewer overflows

by IWA Publishing  (Aug. 7, 2014)

Odaiba seaside park is one of the most popular waterfronts in Tokyo Bay, but is easily affected by wet weather pollutant loads through combined sewer overflows (CSOs). The monitoring data of Escherichia coli clearly showed high faecal contamination after a rainfall event on 9–11 November 2007. We estimated the amounts of discharge volume ...

The impact of point sources of pollution on the transport of micropollutants along the river continuum

by IWA Publishing  (Jun. 18, 2014)

The main objectives of the presented study were to quantify the transfer of polychlorinated dibenzo-p-dioxins (PCDDs)/polychlorinated dibenzofurans (PCDFs) (polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans) and dioxin-like polychlorinated biphenyls (dl-PCBs) along the river continuum and to evaluate the impact of wastewater ...

Longitudinal and transverse dispersion coefficients in braided rivers

by IWA Publishing  (Jul. 23, 2014)

The dispersion characteristics of braided rivers are presently unclear. The comprehensive flow structure in a physical braided river model was measured and was used to estimate its dispersion coefficient tensor. The largest values of the longitudinal and transverse dispersion coefficients occurred in the separation zone in two anabranches. The ...

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