NUTRIENT LOADS TO WISCONSIN LAKES: PART I. NITROGEN AND PHOSPHORUS EXPORT COEFFICIENTS<sup>1</sup>

Clesceri, Nicholas L.; Curran, S.; Sedlak, Richard

doi:10.1111/j.1752-1688.1986.tb00769.x

Cited by 54 publications

(24 citation statements)

References 12 publications

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“…In the study basins, both the proportion of the TP load represented by TDP and the TDP yield itself increase with the level of point source P input from STWs (cf. Clesceri et al, 1986). In the rural basin of the River Dart, which has very limited point source inputs, approximately 25% of the TP load was transported as dissolved P and 75% as particulate P. In contrast, nearly 74% of the TP load was transported as dissolved P in the River Avon, which is the basin most in¯uenced by point source inputs.…”

Section: Annual Nutrient Loadsmentioning

confidence: 94%

The composition of nutrient fluxes from contrasting UK river basins

et al. 1998

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Abstract:Accurate estimates of N and P loads were obtained for four contrasting UK river basins over a complete annual cycle. The fractionation of these loads into dissolved and particulate, and inorganic and organic components allowed a detailed examination of the nutrient load composition and of the factors in¯uencing both the relative and absolute magnitude of these components. The particulate phosphorus (TPP) loads account for 26±75% of the annual total phosphorus (TP) transport and are predominantly inorganic. The inorganic (PIP) and organic (POP) fractions of the TPP loads represent 20±47% and 6±28% of the annual TP transport, respectively. In contrast, the particulate nitrogen loads (TPN) represent 8% or less of the annual total nitrogen (TN) loads and are predominately organic. For dissolved P transport, the dissolved inorganic fraction (DIP) is more important, representing 15±70% of the TP loads, whereas the dissolved organic fraction (DOP) represents only 3±9% of the TP loads. The TN loads are dominated by the dissolved component and more particularly the total oxidized fraction (TON), which is composed of nitrate and nitrite and represents 76±82% of the annual TN transport. The remaining dissolved N species, ammonium (NH 4 -N) and organic N (DON) account for 0 . 3±1 . 2% and 13±16% of the annual TN transport, respectively. The TPN and TPP¯uxes closely re¯ect the suspended sediment dynamics of the study basins, which are in turn controlled by basin size and morphology. The dissolved inorganic nutrient¯uxes are in¯uenced by point source inputs to the study basins, especially for P, although the TON¯ux is primarily in¯uenced by diuse source contributions and the hydrological connectivity between the river and its catchment area. The dissolved organic fractions are closely related to the dissolved organic carbon (DOC) dynamics, which are in turn in¯uenced by land use and basin size. The magnitude of the NH 4 -N fraction was dependent on the proximity of the monitoring station to point source discharges, because of rapid nitri®cation within the water column. However, during storm events, desorption from suspended sediment may be temporarily important. Both the magnitude and relative contribution of the dierent nutrient fractions exhibit signi®cant seasonal variability in response to the hydrological regime, sediment mobilization, the degree of dilution of point source inputs and biological processes. #

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Section: Annual Nutrient Loadsmentioning

confidence: 94%

The composition of nutrient fluxes from contrasting UK river basins

et al. 1998

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“…As well as these major (mostly national) investigations, several large regional studies were conducted including the Connecticut Lakes study (Norvell et al, 1979), the Wisconsin Lakes study (Clesceri et al, 1986), the Chesapeake Bay study (Donigian et al, 1990) and the Long Island Sound study (Frink, 1991). Innumerable smaller studies have also been undertaken in the USA, concentrating on agriculture (both grazing and cropping) and urban areas.…”

Section:     mentioning

confidence: 99%

Nutrient Exports and Land Use in Australian Catchments

Young

Marston

Davis

1996

Journal of Environmental Management

118

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“…Temperature is the ecological driver and affects the anoxic conditions and rate constants of many chemical and microbiological reactions controlling the release of P to groundwater [34][35][36]. The Arrhenius equation has been used for simulating the temperature effects of the biotic and abiotic processes that describe the P loss [37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Factors Affecting Phosphorous in Groundwater in an Alluvial Valley Aquifer: Implications for Best Management Practices

Flores-López

Easton

Geohring

et al. 2013

Water

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Many streams in the US are impaired because of high Soluble Reactive Phosphorous (SRP) contributions from agriculture. However, the drivers of ecological processes that lead to SRP loss in baseflow from groundwater are not sufficiently understood to design effective Best Management Practices (BMPs). In this paper, we examine how soil temperature and water table depth influence the SRP concentrations in groundwater for a dairy farm in a valley bottom in the Catskills (NY, USA). Measured SRP concentrations in groundwater and baseflow were greater during the fall, when soil temperatures are warmer, than during winter and spring. The observed concentrations were within the bounds predicted by groundwater temperatures using the Arrhenius equation, except during fall, when concentrations rose above these predictions. These elevated concentrations were likely caused by mineralization and consequent accumulation of phosphorous (P) in summer. In addition, SRP concentrations were greater in near-stream areas, where water tables where higher. In short, SRP concentrations are dependent on temperature, demonstrating the importance of understanding the underlying mechanism of OPEN ACCESSWater 2013, 5 541 ecological processes. In addition, results suggest BMPs that apply manure on land having a deep groundwater, instead of on land with a shallow water table will lower overall SRP contributions.

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NUTRIENT LOADS TO WISCONSIN LAKES: PART I. NITROGEN AND PHOSPHORUS EXPORT COEFFICIENTS¹

Cited by 54 publications

References 12 publications

The composition of nutrient fluxes from contrasting UK river basins

The composition of nutrient fluxes from contrasting UK river basins

Nutrient Exports and Land Use in Australian Catchments

Factors Affecting Phosphorous in Groundwater in an Alluvial Valley Aquifer: Implications for Best Management Practices

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NUTRIENT LOADS TO WISCONSIN LAKES: PART I. NITROGEN AND PHOSPHORUS EXPORT COEFFICIENTS1

Cited by 54 publications

References 12 publications

The composition of nutrient fluxes from contrasting UK river basins

The composition of nutrient fluxes from contrasting UK river basins

Nutrient Exports and Land Use in Australian Catchments

Factors Affecting Phosphorous in Groundwater in an Alluvial Valley Aquifer: Implications for Best Management Practices

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Product

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NUTRIENT LOADS TO WISCONSIN LAKES: PART I. NITROGEN AND PHOSPHORUS EXPORT COEFFICIENTS¹