The phosphorus content in the run-off from the coastal catchment of the Peel Inlet and Harvey Estuary and its associations with land characteristics

Summers, Robert; Gool, Dennis van; Guise, Neil; Heady, G.J; Allen, Thompson

doi:10.1016/s0167-8809(99)00049-3

Cited by 14 publications

(7 citation statements)

References 11 publications

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“…Generally, the sands overlying clays in the catchment receive most of the applied fertilizer P. The clay is probably binding some proportion of applied P. An analysis of P concentration and flux of 42 tributaries of the Peel-Harvey Estuary, adjacent to and south of the Swan-Canning Estuary, concluded that the area closest to the drainage system had an influence on the concentration of P discharged. Also, the presence of native vegetation was associated with lower P discharge and the proportion of the subcatchment in pasture or that was susceptible to waterlogging was positively correlated with P flux (Summers et al, 1999). Therefore, high P concentrations in water draining rapidly through or over (waterlogged soil) the sandy coastal plain soil contribute more P to the drainage water than longer residence time waters, which have more time to interact with soil clay.…”

Section: Spatial Variabilitymentioning

confidence: 98%

“…It is important to characterize the stormflow contribution of nutrients to the estuary, particularly during dry weather, because the management alternatives for this hydrologic component differ markedly from the management of nutrients derived from diffuse sources, mainly inorganic fertilizer and manure in the catchment of the tributaries. Similarly, for the tributaries that deliver the most nutrients, it is important to evaluate the spatial contribution of the nutrients within the tributary drainage to refine the nutrient management strategy (Leinweber et al, 1999;Summers et al, 1999).…”

Section: Future Considerationsmentioning

confidence: 99%

“…P readily adsorbs to Fe and Al oxides and hydroxides in soils, and soils lacking these elements are more rapidly leached (Weaver and Reed, 1998). The proximity of P sources and associated leachability of P from the soils, therefore, is important in controlling dissolved P transport, and again the proximity and P content of clay soils, which may be readily eroded, is important in controlling the particulate P transport (Stevens et al, 1999;Summers et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…The increasing application rate of low-cost fertilizer for agriculture in the drainage basin is a primary concern. Fertilizer is the main source of nutrients that has resulted in eutrophication of aquatic systems in southwestern Australia (Hodgkin and Lenanton, 1981;Hodgkin and Hamilton, 1993;Summers et al, 1999) and throughout the world (Meybeck et al, 1989;Foy and Withers, 1995;Puckett, 1995;Heathwaite et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

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Nutrient transport to the Swan–Canning Estuary, Western Australia

Peters

Donohue²

2001

Hydrological Processes

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Abstract:Catchment nutrient availability in Western Australia is primarily controlled by the disposal of animal waste and the type and rate of fertilizer application, particularly on the relatively narrow (¾25 km wide), sandy coastal plain. Nitrogen (N) and phosphorus (P) concentrations and fluxes during the wet season of 15 tributaries, including four urban drains to the Swan-Canning Estuary, were evaluated from 1986 to 1992 and additionally concentrations only were evaluated throughout the year from 1993 to 1996. Concentrations of filtered reactive P (FRP) and total P (TP) were generally low, with the volume-weighted means for all sites being 0Ð06 mg l 1 and 0Ð12 mg l 1 respectively. The urban drains had higher TP concentrations (volume-weighted mean of 0Ð21 mg l 1 ) than the streams (0Ð12 mg l 1 ), with the high concentrations associated with particulate matter. Total inorganic N (TIN, NH 4 N plus NO 3 N) and total N (TN), which is of interest to eutrophic status of the N-limited estuary, were likewise low, compared with other developed areas having a similar climate. Both TIN and TN were higher in the urban drains (0Ð76 mg l 1 and 1Ð5 mg l 1 respectively) than the streams (0Ð31 mg l 1 and 1Ð2 mg l 1 respectively). The Avon River, which drains 98Ð5% of the 121 000 km 2 catchment area, contributes most of the N (0Ð03 kg ha 1 year 1 or 65%) and a high percentage of the P (<0Ð01 kg ha 1 year 1 or 32%) to the estuaries. The Avon River nutrient fluxes are much less than other tributaries closer to the estuary. The coastal plain receives significantly higher rainfall (1,200 mm year 1 ) and has more intense horticulture and animal production than inland areas (<300 mm year 1 ). Annual rainfall is seasonal, occurring primarily from May through December. The surficial aquifers on the coastal plain generally are sandy with a low nutrient retention capacity, and rapidly transmit soluble and colloidal material in subsurface flow. Ellen Brook, on the coastal plain, drains pastures treated with superphosphate and has the highest FRP (0Ð51 mg l 1 ), TP (0Ð7 mg l 1 ) and TN (2Ð1 mg l 1 ) of any tributary to the estuary. The coastal plain is also undergoing urbanization, particularly in areas adjacent to the estuary. Nutrients are subsequently available for transport during the onset of seasonal wet weather. Perennial baseflow from urban areas is an important source of nutrients. Water yield from the urban areas was high, being as much as 50% of annual rainfall. The timing of the nutrients delivered by the tributaries may be an important control on estuarine ecology.

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Section: Spatial Variabilitymentioning

confidence: 98%

Section: Future Considerationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nutrient transport to the Swan–Canning Estuary, Western Australia

Peters

Donohue²

2001

Hydrological Processes

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“…In order to assess various land uses, P load was measured from 42 subcatchments in the Peel-Harvey watershed of Australia (Summers et al, 1999). Data analysis indicated that land areas closest to the drainage system had an influence on the concentration of P discharged and areas with native vegetation tended to have lower P discharge.…”

mentioning

confidence: 99%

Nonpoint Sources

Line¹,

Osmond²,

McLaughlin³

et al. 2001

Water Environment Research

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δ18O as a tracer of PO43- losses from agricultural landscapes

Hipsey

Gooddy

Reshid

et al. 2022

Preprint

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Accurately tracing the sources and fate of excess PO4 3in waterways is necessary for sustainable catchment management. The natural abundance isotopic composition of O in PO4 3-(δ 18 OP) is a promising tracer of point source pollution, but its ability to track diffuse agricultural pollution is unclear. We tested the hypothesis that δ 18 OP could distinguish between agricultural PO4 3sources by measuring the integrated δ 18 OP composition and P speciation of contrasting inorganic fertilisers (compound v rock) and soil textures (sand, loam, clay). δ 18 OP composition differed between the three soil textures sampled across six working livestock farms: sandy soils had lower overall δ 18 OP values (21 ± 1 ‰) than the loams (23 ± 1 ‰), which corresponded with a smaller, but more readily leachable, PO4 3pool. Fertilisers had greater δ 18 OP variability (~8‰) driven by both fertiliser type and manufacturing year. Upscaling these values showed that 'agricultural soil leaching' δ 18 OP signatures could span from 18 -25 ‰, and are influenced by both fertiliser type and the time between application and leaching. These findings emphasise the potential of δ 18 OP to untangle soilfertiliser P dynamics under controlled conditions, but that its use to trace catchmentscale agricultural PO4 3losses is limited by uncertainties in soil biological P cycling and its associated isotopic fractionation.

show abstract

The phosphorus content in the run-off from the coastal catchment of the Peel Inlet and Harvey Estuary and its associations with land characteristics

Cited by 14 publications

References 11 publications

Nutrient transport to the Swan–Canning Estuary, Western Australia

Nutrient transport to the Swan–Canning Estuary, Western Australia

Nonpoint Sources

δ18O as a tracer of PO43- losses from agricultural landscapes

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