Characterising phosphorus transfers in rural catchments using a continuous bank-side analyser
Characterising phosphorus transfers in rural catchments using a continuous bank-side analyser
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DOI：
10.5194/hess-11-372-2007
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发表时间：
2007-01-01
影响因子：
6.3
通讯作者：
McCormick, S.
中科院分区：
文献类型：
--
作者：
Jordan, P.;Arnscheidt, A.;McCormick, S.
本文介绍了北方爱尔兰内伊湖流域一个5 km（2）农业集水区6个月的高分辨率同步河流流量和总磷（TP）浓度数据。这些数据是使用新的岸边自动连续监测技术每小时10分钟测量的平均值。三个TP传输“事件类型”发生在这个流域：（1）慢性，风暴独立的传输;（2）急性，风暴依赖的传输;（3）急性，风暴独立的传输。事件类型2转移超过90%的总279公斤的TP负荷在39%的总期间，它对应于从农业土壤扩散转移。事件类型1和3，但是，保持河流在风暴事件之间的高度富营养化状态和点源污染的特点，尽管没有主要的工业或市政点源。在流域尺度上管理磷转移需要一个强大的监测技术，以区分动态，多个源和相关的事件类型，从而使一个可靠的评估的性能的缓解措施，在流域出口监测。本研究中产生的同步和连续TP和放电数据系列证明了这是如何可能的。
A six-month series of high-resolution synchronous stream discharge and total phosphorus (TP) concentration data is presented from a 5 km(2) agricultural catchment in the Lough Neagh basin, Northern Ireland. The data arc hourly averages of 10-minute measurements using a new bankside, automatic, continuous monitoring technology. Three TPtransfer 'event-types' occur in this catchment: (1) chronic, storm independent transfers; (2) acute, storm dependent transfers; (3) acute, storm independent transfers. Event-type 2 transferred over 90% of the total 279 kg TP load in 39% of the total period; it corresponded to diffuse transfers from agricultural soils. Event-types 1 and 3, however, maintained the river in a highly eutrophic state between storm events and were characteristic of point source pollution, despite there being no major industrial or municipal point sources. Managing P transfers at the catchment scale requires a robust monitoring technology to differentiate between dynamic, multiple sources and associated event types and so enable a reliable assessment of the performance of mitigation measures, monitored at catchment outlets. The synchronous and continuous TP and discharge data series generated in this study demonstrate how this is possible.