High-resolution phosphorus transfers at the catchment scale: the hidden importance of non-storm transfers

被引：82

作者：

Jordan, P ^{[1
]}

Arnscheidt, J

McGrogan, H

McCormick, S

机构：

[1] Univ Ulster, Sch Environm Sci, Coleraine, Londonderry, North Ireland

[2] Dept Agr & Rural Dev, Belfast, Antrim, North Ireland

来源：

HYDROLOGY AND EARTH SYSTEM SCIENCES | 2005年 / 9卷 / 06期

关键词：

acute and chronic phosphorus transfers; high-resolution monitoring; catchments;

D O I：

10.5194/hess-9-685-2005

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

High-resolution measurements of total phosphorus (TP) concentrations in a stream draining a 5 km(2) agricultural catchment (a sub-catchment of Lough Neagh in Northern Ireland) were made every 10 mins by continuous flow instrumentation using new homogenisation, digestion and colorimetric phases. Concurrently, rainfall and stream discharge data were collected at 5 and 15 min. intervals. Major P flushing episodes during storm events peaked on the rising limbs of storm hydrographs. A period of baseflow also indicated the importance of other sources that maintain the stream in a eutrophic state between storm events. These data provide insights into catchment processes that conform to definite patterns that, in a coarser sampling regime, might ordinarily be attributed to sampling and analytical 'noise'.

引用

页码：685 / 691

页数：7

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