This paper follows the propagation of pollution in a river with rectangular cross-section bed and variable cross-sectional velocity. The calculations were made for steady flows pollutant concentrations. To approximate velocity distribution set equations current vorticity functions was solved. concentrations calculated from bidirectional advection turbulent diffusion equation. Analysis leads to ...

Recently, many publications have explored the utility of Geographic Information Systems (GIS) and remote-sensed imagery to approximate the regional causes of water pollution (Basnyat 1999; Basnyat 2000; Griffith 2002). In such studies, water pollution data is placed in a geographic context to see what generalizations can be made about the impact of regional land use practices on water quality. ...

Potentially harmful elements (PHE) occur both naturally from geogenic sources and from anthropogenic derived pollution. Anthropogenic sources can be further categorised into those derived from point sources. A point source is a single identifiable source which is confined to a very small area such as that arising from disposal of waste material or from an industrial plant. Diffuse pollution ari...

Environmental monitoring of environmental pollution prevention and control in humans to resolve existing or potential environmental problems and improve the living environment and the ecological environment, coordinating the relationship between human beings and the environment, and ultimately to sustainable human development plays an important role. In order to accurately and fully grasp the p...

In order to realize the forecasting of the UHV DC insulator's pollution conditions, we introduced a PSOBP algorithm. A BP neural network (BPNN) with leakage current, temperature, relative humidity and dew point as input neurons, and ESDD as output neuron was built to forecast the ESDD. The PSO was used to optimize the the BPNN, which had great improved the convergence rate of the BP neural netw...

From the first awareness of agricultural sources of water pollution in the US in the 1960s, we finally see in the 1990s a commitment at the national level for agricultural non-point source (NPS) pollution control. This has been occasioned by a growing awareness that, with point sources of some pollutants largely controlled by waste-water treatment, greater attention must be paid to NPS pollutio...