Abstract This paper aims to assess the requirement of load reductions and flow augmentation enhance assimilation yield Yamuna River, Delhi. The framework QUAL2kw was used predict river quality. model calibrated confirmed in critical conditions pre-monsoon periods. Three strategies were established for varying pollutant loads. dissolved oxygen (DO) concentration predicted with changing biochemic...

Lake Fuxian is the largest deep freshwater lake in China. Although its average water quality meets Class I of the China National Water Quality Standard (CNWQS), i.e., GB3838-2002, monitoring data indicate that the water quality approaches the Class II threshold in some areas. Thus it is urgent to reduce the watershed load through the total maximum daily load (TMDL) program. A three-dimensional ...

An improved flexible solar-aided power generation system (SAPG) for enhancing both selective catalytic reduction (SCR) de-NOx efficiency and coal-based energy efficiency of coal-fired power plants is proposed. In the proposed concept, the solar energy injection point is changed for different power plant loads, bringing about different benefits for coal-fired power generation. For partial/low lo...

Particle methods are an important technique for simulating transport phenomena such as the transport of pollutants in coastal waters. Particle methods can quite accurately predict the pollutant transport in cases of steep concentration gradients after the pollutant has just entered into the water, whereas conventional numerical methods such as finite difference and finite volume methods may hav...

The main purpose of this research is to determine the generation quantity of each generator in a power system. In this way, not only will the electricity demanded by the system be supplied, but the cost of fuel along with the level of pollution can be minimized. Obviously, calculation of the optimal layout of power plants with the aim of minimizing fuel costs and pollutants level contributes to...

Research indicates that multiple outdoor air pollutants and adverse neighborhood conditions are spatially correlated. Yet health risks associated with concurrent exposure to air pollution mixtures and clustered neighborhood factors remain underexplored. Statistical models to assess the health effects from pollutant mixtures remain limited, due to problems of collinearity between pollutants and ...

non-point pollution are an important factor in determining water quality and eutrophication of fresh water. the principle causes of this issue is high concentrations of nutrients in the water especially nitrogen and phosphorus. change of land use particularly affected on water nitrate load. therefore, understanding the correlations between land use and nitrate pollutant is a priority in order t...

acid rain has been a big problem for urban area during recent decades. acid rain comes from high concentration of air pollutant, including man made or artificial and natural, in the atmosphere. mashhad, as the biggest religious town in iran, has also been imposed with this problem. in this investigation the samples of rains during autumn 2002 and spring 2003 are analyzed. the results showed tha...