Streamwater nitrate concentrations in six agricultural catchments in Scotland

Hooda, Peter S.; Moynagh, M.; Svoboda, I. F.; Thurlow, Martha L.; Stewart, M.; Thomson, Michael J.; Anderson, Helen

doi:10.1016/s0048-9697(97)84053-3

Cited by 16 publications

(12 citation statements)

References 20 publications

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“…In six agricultural catchment areas in Scotland also Hooda et al (1997) observed that nitrate stream concentrations were generally larger downstream compared with upstream, reflecting input from the farms. Seasonal variations of riverine export of nitrate from agricultural watersheds in Illinois were examined by Royer et al (2006).…”

Section: Measured Nitrogen Concentrations Along the River Longitudinamentioning

confidence: 87%

“…Drainage systems like tile drainage and open ditches change the natural water balance and influence the instream water quality due to a faster nutrient transport. Hooda et al (1997) examined six small streams in agricultural catchment areas in Scotland and found that field drains or smaller ditches, despite having relatively high NO 3 -N concentrations, contributed small overall loadings and had either only short-range or no detectable impact on stream concentrations. David et al (1997) detected high NO 3 -N concentrations within the range of 5 to 49 mg/l in drainage tiles in an agricultural catchment area in Illinois.…”

Section: Introductionmentioning

confidence: 99%

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A method to assess instream water quality – the role of nitrogen entries in a North German rural lowland catchment

2008

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Abstract. The objective of this study was the detection and assessment of nutrient entry pathways in a complex mesoscale lowland catchment. The central aim was the development of a transferable method for an efficient estimation of instream water quality in rural environments. The investigated Kielstau catchment with a size of approximately 50 km 2 is located in the North German lowlands. Land use is dominated by agriculture as well as pasture and is characterised by extensive artificial drainage systems. Additionally wastewater treatment plants influence the river water quality.Six measuring campaigns were carried out over the period of one year. Each time, water quality was assessed at 16 locations along a 12 km longitudinal transect of the stream to consider the influence of each tributary or inflow. The results showed that the applied measuring method was useful to assess nutrient entry pathways into surface waters from diffuse and point sources. Some tributaries increased the main stream NO 3 -N concentrations especially in autumn. Using a German classification system (LAWA, 1998), the NO 3 -N results can mostly be assigned to water quality class III (heavily contaminated). Water balance and nitrate loads were modelled with the river basin scale model SWAT (Soil and Water Assessment Tool, Arnold et al., 1998). The measured and modelled discharges showed a good correlation. While nitrate load range and dynamics are well represented during the summer periods, they show a poor correlation during the winter period.

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Section: Measured Nitrogen Concentrations Along the River Longitudinamentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

A method to assess instream water quality – the role of nitrogen entries in a North German rural lowland catchment

2008

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“…The flow was estimated using a stageheight and correlating this with a previously calculated relationship between the stage-height and stream flow as described by Hooda et al (1997). It is a second order stream with the flow varying from 2 L s À1 at base flow to about 1000 L s À1 at flood.…”

Section: Collection Of Water Samplesmentioning

confidence: 99%

Farmyard point discharges and their influence on nutrient and labile carbon dynamics in a second order stream draining through a dairy unit

Edwards

Hooda

2008

Journal of Environmental Management

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“…The results showed that outputs from even a single farm produced detectable increases in streamwater nitrate (Hooda et al, 1997a) and phosphate (Hooda et al, 1997b) concentrations. The work presented in this paper involved a survey of benthic macroinvertebrates and associated water quality/environmental components in three streams draining farm-sized catchments, and formed a part of the same study.…”

Section: Introductionmentioning

confidence: 97%

Macroinvertebrates As Bioindicators of Water Pollution in Streams Draining Dairy Farming Catchments

Hooda

Moynagh

Svoboda

et al. 2000

Chemistry and Ecology

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Runoff from intensive dairy farming systems can impair the quality of catchment waters, with potential ecological and human health implications. A water quality study was carried out in three streams in a predominantly dairy farming region, with the aim of assessing the effects of diffused-and point-sourced inputs on a number of water quality parameters and benthic macroinvertebrates. The results showed significant increases in streamwater biochemical oxygen demand (BOD), ammonium-nitrogen (m-N) and molybdate reactive phosphorus (MRP) concentrations between the farm reaches. These changes in water quality appeared to be due largely to the point-sourced inputs from farmyards, and had a significant effect on the ability of the water to support a healthy and diverse community of invertebrates. The results also showed that concentrations of dissolved oxygen (DO) and ammonium in streamwater were the two most important parameters studied that were inversely related to the invertebrate scores.

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Streamwater nitrate concentrations in six agricultural catchments in Scotland

Cited by 16 publications

References 20 publications

A method to assess instream water quality – the role of nitrogen entries in a North German rural lowland catchment

A method to assess instream water quality – the role of nitrogen entries in a North German rural lowland catchment

Farmyard point discharges and their influence on nutrient and labile carbon dynamics in a second order stream draining through a dairy unit

Macroinvertebrates As Bioindicators of Water Pollution in Streams Draining Dairy Farming Catchments

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