Suspended sediment, nitrogen and phosphorus concentrations and exports during storm-events to the Tuross estuary, Australia

Drewry, John; Newham, Lachlan; Croke, Barry

doi:10.1016/j.jenvman.2008.02.004

Cited by 70 publications

(46 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous studies characterizing variability in responses of catchment nutrient exports to storm events have focused mainly on single parameters, such as nitrate [Chen et al, 2012;Carey et al, 2014], fluorescent dissolved organic matter [Saraceno et al, 2009], or phosphate [Bowes et al, 2005], although in recent years a growing number have considered varying responses between nutrient types [Drewry et al, 2009;Pellerin et al, 2012;Outram et al, 2014]. Moreover, very few studies have investigated how changes in hydroclimatology, both during and preceding storm events, control river nutrient export and source zone activation under extreme flow conditions, despite a clear requirement for this information for the effective management of catchment water resources both now and under future climate regimes.…”

Section: Introductionmentioning

confidence: 99%

High‐frequency monitoring of catchment nutrient exports reveals highly variable storm event responses and dynamic source zone activation

et al. 2017

View full text Add to dashboard Cite

Storm events can drive highly variable behavior in catchment nutrient and water fluxes, yet short‐term event dynamics are frequently missed by low‐resolution sampling regimes. In addition, nutrient source zone contributions can vary significantly within and between storm events. Our inability to identify and characterize time‐dynamic source zone contributions severely hampers the adequate design of land use management practices in order to control nutrient exports from agricultural landscapes. Here we utilize an 8 month high‐frequency (hourly) time series of streamflow, nitrate (NO3‐N), dissolved organic carbon (DOC), and hydroclimatic variables for a headwater agricultural catchment. We identified 29 distinct storm events across the monitoring period. These events represented 31% of the time series and contributed disproportionately to nutrient loads (42% of NO3‐N and 43% of DOC) relative to their duration. Regression analysis identified a small subset of hydroclimatological variables (notably precipitation intensity and antecedent conditions) as key drivers of nutrient dynamics during storm events. Hysteresis analysis of nutrient concentration‐discharge relationships highlighted the dynamic activation of discrete NO3‐N and DOC source zones, which varied on an event‐specific basis. Our results highlight the benefits of high‐frequency in situ monitoring for characterizing short‐term nutrient fluxes and unraveling connections between hydroclimatological variability and river nutrient export and source zone activation under extreme flow conditions. These new process‐based insights, which we summarize in a conceptual model, are fundamental to underpinning targeted management measures to reduce nutrient loading of surface waters.

show abstract

Section: Introductionmentioning

confidence: 99%

High‐frequency monitoring of catchment nutrient exports reveals highly variable storm event responses and dynamic source zone activation

et al. 2017

View full text Add to dashboard Cite

show abstract

“…These observations for nitrogen compounds are consistent with those of Zhu et al (2011), who noted that only 25% of NO 3 ÁN and 35% of TN were exported in stormflow, and Schilling and Zhang (2004) who found that more than 50% of NO 3 ÁN was exported in baseflow in two central Iowa catchments with mixed land use. In direct contrast, Drewry et al (2009) found that 96% and 93% of NO 3 ÁN and TN loads were transported in storm events monitored in South Australia.…”

Section: Stormflow Versus Baseflowmentioning

confidence: 86%

“…For example Drewry et al (2009), in their study of storm events, observed highest pollutant loads for an event which followed a prolonged dry spell. However, for this study, the event which transported the lowest pollutant loads occurred in late summer after a prolonged dry spell.…”

Section: Stormflow Versus Baseflowmentioning

confidence: 99%

Nitrogen, phosphorus andE. coliloads in the Sherry River, New Zealand

Ballantine

Davies-Colley

2013

New Zealand Journal of Marine and Freshwater Research

View full text Add to dashboard Cite

The Sherry River, a tributary of the Motueka River (Tasman District, upper South Island, New Zealand), has somewhat degraded water quality related to a high proportion of the catchment being used for pastoral agriculture (which comprises 30% dairying). We undertook a campaign to estimate loads of phosphorus, nitrogen and Escherichia coli for comparison with other dairy-impacted catchments and against which to measure future reductions in pollutants in the Sherry River, expected from changed management practices. Monthly water quality sampling in the Sherry River was augmented with storm chasing for one year (October 2008 to October 2009). Loads of pollutants in events increased disproportionately with event peak flow, probably because the proportion of overland flow increases systematically with increasing event size. Stormflows (occurring 9.5% of the time) transported 33% of the total flow from the Sherry River, and between 22% (for nitrate) and 92% (for E. coli) of pollutant loads.

show abstract

“…It shows that precipitation is the most significant factor on water, chemical and nutrient loads which influence the water quality in streams. Generally, small scale sites have a clear positive rela-tionship between the loads of leached nutrient and rainfall [25]. Previous study reported that the changes in the nutrient concentrations of the drainage water over rainfall events indicated the transport of the particulate materials and of the nutrients such as nitrogen and phosphorus were mainly influenced by direct runoff and base flow, respectively [6].…”

Section: Nutrient Loss In Surface Water Throughmentioning

confidence: 99%

Impacts of Pig Manure-Based Liquid Fertilizer Agricultural Application on the Water Quality of Agricultural Catchment

Kim¹,

Kwon²,

Chun³

et al. 2013

JEP

View full text Add to dashboard Cite

This study was conducted to understand the effect of the livestock liquid fertilizer treatment at field-scale up to catchment-scale on the water quality properties. Cultivated paddy rice and upland plots located in Gyeonggi province, Korea were treated with two different liquid fertilizers, SP (Liquid fertilizer with storage process) and SCB (Liquid fertilizer with slurry composting and bio-filtration process). Plots with no fertilizer (control A) and chemical fertilizer (control B) were also prepared for comparison. Water quantity and quality were monitored at the catchment outlet for assessing the effect on water quality of stream water. As a result, the losses of N and P and the values of EC (Electronic Conductivity) in the surface drainage water from paddy rice plots treated with SP and SCB were higher than those from the control plots (A and B). In addition, the losses of N and P by the runoff water from upland plots with SP and SCB treatment were higher than those from control plots (A and B). The nutrient outflow from paddy rice fields and uplands with application of liquid pig manure was higher than those from the control plots (A and B). Particularly, the outflow from uplands may directly affect the water quality in neighboring streams. This caused the major eutrophication problem in stream water. In conclusion, it is necessary to establish the proper management practices to prevent the nutrient losses from agricultural fields and the pollutants against water environments.

show abstract

Suspended sediment, nitrogen and phosphorus concentrations and exports during storm-events to the Tuross estuary, Australia

Cited by 70 publications

References 22 publications

High‐frequency monitoring of catchment nutrient exports reveals highly variable storm event responses and dynamic source zone activation

High‐frequency monitoring of catchment nutrient exports reveals highly variable storm event responses and dynamic source zone activation

Nitrogen, phosphorus andE. coliloads in the Sherry River, New Zealand

Impacts of Pig Manure-Based Liquid Fertilizer Agricultural Application on the Water Quality of Agricultural Catchment

Contact Info

Product

Resources

About