The Water Quality of the River Enborne, UK: Observations from High-Frequency Monitoring in a Rural, Lowland River System
The Water Quality of the River Enborne, UK: Observations from High-Frequency Monitoring in a Rural, Lowland River System
复制标题
DOI：
10.3390/w6010150
复制
发表时间：
2014-01-01
期刊：
影响因子：
3.4
通讯作者：
Wade, Andrew J.
中科院分区：
文献类型：
--
作者：
Halliday, Sarah J.;Skeffington, Richard A.;Wade, Andrew J.
本文报告了对英格兰低地的一条乡村河流——恩伯恩河（River Enborne）的水质进行了为期两年的研究的结果。氮和磷的浓度和其他化学决定因素的监测，在高频（每小时），使用自动化的现场仪器，并通过人工每周采样和实验室分析。流域土地主要用于农业，人口密度为123人公里（-2）。河水主要来自钙质地下水，氮磷浓度高。农业肥料是氮和磷年负荷的主要来源。然而，数据表明，污水排放对河流氮磷动态的影响不成比例。至少有38%的集水区人口使用化粪池系统，但其影响很难量化，因为只有6%的人被正式登记，其他的人的特点是未知的。只有4%的磷输入和9%的氮输入由河流从集水区输出，这突出了了解集水区过程对预测营养浓度的重要性。高频监测将是发展这一重要过程理解的关键。
This paper reports the results of a 2-year study of water quality in the River Enborne, a rural river in lowland England. Concentrations of nitrogen and phosphorus species and other chemical determinands were monitored both at high-frequency (hourly), using automated in situ instrumentation, and by manual weekly sampling and laboratory analysis. The catchment land use is largely agricultural, with a population density of 123 persons km(-2). The river water is largely derived from calcareous groundwater, and there are high nitrogen and phosphorus concentrations. Agricultural fertiliser is the dominant source of annual loads of both nitrogen and phosphorus. However, the data show that sewage effluent discharges have a disproportionate effect on the river nitrogen and phosphorus dynamics. At least 38% of the catchment population use septic tank systems, but the effects are hard to quantify as only 6% are officially registered, and the characteristics of the others are unknown. Only 4% of the phosphorus input and 9% of the nitrogen input is exported from the catchment by the river, highlighting the importance of catchment process understanding in predicting nutrient concentrations. High-frequency monitoring will be a key to developing this vital process understanding.