干旱区生态环境知识资源中心(Arid): Water quality and spatio-temporal hot spots in an effluent-dominated urban river

Arid

DOI	10.1002/hyp.14001
	Water quality and spatio-temporal hot spots in an effluent-dominated urban river
	Schliemann, Sarah A.; Grevstad, Nels; Brazeau, Randi H.
通讯作者	Schliemann, SA
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
英文摘要	In arid and semi-arid regions, many rivers experience extremely low flow conditions during seasonal dry periods. During these times, effluent from wastewater treatment plants can make up the majority of flow in the river. However, water quality in urban systems can also be strongly influenced by the natural or human-influenced flow regime and discharge from other anthropogenic sources such as industrial operations and runoff from impervious surfaces. In this study, we aimed to determine whether water quality was controlled primarily by wastewater discharge in an effluent-dominated river. Between May 2016-May 2019, we systematically measured water temperature, pH, dissolved oxygen, biochemical oxygen demand, and the concentrations of nitrate-N, ammonia-N, and orthophosphate in the South Platte River in the Denver metropolitan area, Colorado, USA. We found that, despite being an effluent-dominated river, wastewater treatment plant discharge was not the principal factor controlling water quality in many of the sampled areas. Non-point source pollution from impervious surfaces, delivered to the river through storm drains and minor tributary streams, also contributed to the high nutrient conditions in several locations. We also noted a strong seasonality in water quality, with higher concentrations of nutrients and higher biochemical oxygen demand in the winter months when wastewater effluent can make up more than 90% of the flow in the river. Thus, the interaction of discharge location and reduced seasonal flow produced spatio-temporal hot spots of diminished water quality. More stringent enforcement of water quality regulations may improve water quality in this system. However, a large portion of the pollution seems to be from non-point sources, which are very difficult to control.
英文关键词	effluent‐ dominated hot moments hot spots nutrient pollution South Platte River spatio‐ temporal hot spots water quality
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000599718800001
WOS关键词	AQUATIC SYSTEMS ; STREAMS ; ECOSYSTEMS ; POLLUTION ; MOMENTS ; URBANIZATION ; HYDROLOGY ; NUTRIENTS ; NITROGEN ; IMPACTS
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328610
作者单位	[Schliemann, Sarah A.; Brazeau, Randi H.] Metropolitan State Univ Denver, Earth & Atmospher Sci, Denver, CO 80204 USA; [Grevstad, Nels] Metropolitan State Univ Denver, Math & Comp Sci, Denver, CO USA
推荐引用方式 GB/T 7714	Schliemann, Sarah A.,Grevstad, Nels,Brazeau, Randi H.. Water quality and spatio-temporal hot spots in an effluent-dominated urban river[J].
APA	Schliemann, Sarah A.,Grevstad, Nels,&Brazeau, Randi H..
MLA	Schliemann, Sarah A.,et al."Water quality and spatio-temporal hot spots in an effluent-dominated urban river".HYDROLOGICAL PROCESSES