Evaluation of Selected Reaeration Models for Water Quality Management

Background

Pollution is among severe and serious problem that urgently requires models for monitoring and implementation plans deriving solutions. Daily, domestic, institutional, industrial and agricultural wastes are discharged into the receiving water bodies (UN WWAP, 2003; Geissen et al., 2015). Equivalent amount of these pollutants from human activities get into human and ecosystems. The United Nation (UN) estimates that the amount of wastewater produced annually is about 1500 km³, which six times more water than exists in all the rivers of the world (UN WWAP, 2003). It was reported that lack of adequate sanitation practice is one of the most significant causes of water pollution. Worldwide, 2.5 billion people live without proper sanitation (UNICEF, 2009; Geissen et al.2015,). In some regions of the world, more than 50% of native freshwater fish species are at risk of extinction, and this is also the case for nearly one-third of the world's amphibians (Vié, Hilton-Taylor, and Stuart, 2009; Geissen et al.,2015).