Comparisons of water quality parameters from diverse catchments during dry periods and following rain events

Spatial and temporal variation in nutrient parameters in stream water in a rural-urban catchment, Shikoku, Japan: Effects of land cover and human impact

“…The average levels of coprostanol were the highest at the site of a sewage treatment plant and lowest at forested sites. Water quality parameters, such as phosphorus and faecal coliform, were lower at forested sites than at human-and agriculture-impacted sites, but were still above the regulatory limits for primary recreational contact (Shah et al, 2007).…”

Nutrients and suspended solids in dry weather and storm flows from a tropical catchment with various proportions of rural and urban land use

“…These studies have centered on characterizing urban runoff quality and understanding the relationships between runoff quality and rainfall, runoff and watershed characteristics. Other studies show that pollutant concentrations and loadings for individual watersheds depend on factors such as the sewer system (Lee and Bang, 2000), land use (Galbraith and Burns, 2007;Lee and Bang, 2000;Shah et al, 2007), the type of surface drained (Goebel et al, 2007), rainfall (Brezonik and Stadelmann, 2002;McLeod et al, 2006) and runoff (Brezonik and Stadelmann, 2002). Specific studies characterizing the runoff quality from stormwater ponds (Serrano and DeLorenzo, 2008), areas under development (Dietz and Clausen, 2008), forested areas (Zhang et al, 2008), highway runoff (Kim et al, 2005;Kayhanian et al, 2007), parking lots (Kim et al, 2007a,b), roofs (Gromaire et al, 2001), residential and commercial areas (Lee and Bang, 2000;Lim, 2003;Yusop et al, 2005;McLeod et al, 2006;Shirasuna et al, 2006;Kim et al, 2007a,b), drainage infrastructure (Hatt et al, 2004), the impacts of urban runoff on receiving water bodies (Garcia-Pintado et al, 2006), and best management practices to mitigate pollution from urban runoff (Scholes et al, 2008;Kalainesan et al, 2009) have also been conducted.…”

Spatiotemporal characterization of water chemistry and pollution sources of the Umhlatuzana, Umbilo and Amanzimnyama River catchments of Durban, KwaZulu-Natal, South Africa

“…Exceptions were noted for P at sites 1, 2, 4-8, 10, 15-17 in the dry season; and Cu at sites 7-14 in the wet season. Decreases in P concentrations during the dry season has been shown to be a direct consequence of low surface runoff emanating from surrounding land use types and the subsequent reduction of nutrient loading into the systems (Shah et al 2007). The reduction of Cu concentrations at sites 7-14 (Umhlatuzana River) in the wet season was indicative of low geochemical input of the system and in-stream diluting effects as a consequence of higher rainfall in the wet season.…”