Non linear concentration ndash discharge relationships have

A large amount of research has been conducted to improve our understanding of the timing and mechanisms responsible for the transport of aquatic pollutants in surface and sub-surface runoff from agricultural land, with investigations into the fluvial export of suspended BML-190 from small agricultural catchments enabling exploration of the processes responsible for its delivery (e.g., Glendell and Brazier, 2014, Steegen et al., 2000 and Thompson et al., 2013). Likewise, studies have sought to characterise the nature of P losses from headwater agricultural catchments (e.g., Haygarth et al., 2005b, Hodgkinson and Withers, 2007, Pionke et al., 1996, Soulsby et al., 2002 and Stutter et al., 2008). However, there is currently a dearth of continuous, high-temporal resolution hydro-chemical and suspended sediment monitoring datasets available for rivers draining sensitive headwater catchments. Such high-frequency datasets of discharge, suspended sediment (SS), total phosphorous (TP) and total reactive phosphorus (TRP) enable characterisation of the complex non-linear responses of the monitored determinands at sub-hourly timescales.