Sediment And Nutrient Behaviour On The
River Bandon, Ireland
Author(s)
J. R. Harrington & S. T. Harrington
Abstract
This paper presents aspects of sediment and nutrient behaviour on the River
Bandon which is located in the South Western River Basin District in Ireland; it
is a relatively large sized river catchment in an Irish context with a catchment
area of 608 km2. The river catchment is primarily agricultural with some pockets
of urban development. The river is prone to flooding on stretches, features a
number of special areas of conservation and is distinguished by both suspended
and bed load transport.
Continuous monitoring of turbidity commenced in February 2010. Manual
sampling and testing for suspended sediment concentration and a range of
species of phosphorous was also undertaken. Analysis shows that turbidity is a
suitable surrogate for suspended sediment concentration allowing suspended
sediment loads to be analysed from the continuous data. Similarly suspended
sediment concentration has been found to correlate well with total and particulate
phosphorous allowing phosphorous loads to be analysed using the continuous
data.
The annual suspended sediment load was 6012 tonnes, with the highest loads
experienced during the winter months. The annual total phosphorous load was
found to be 42.9 tonnes with particulate phosphorous accounting for
approximately 64% of this total. High flow storm based events contribute
disproportionately to suspended sediment and phosphorous transport.
The rating curve approach applied to the sampled data can provide good
estimates of the annual load which has particular relevance to Ireland where the
current database of suspended sediment information is limited.
Keywords
suspended sediment, turbidity, phosphorous, loads, particulate, Strom based events, rating curve
Related Book
Other papers in this volume
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