Imputs and Outputs of Water and Phosphorus from Four Victorian Catchments

Campbell, IC

doi:10.1071/mf9780577

Cited by 15 publications

(3 citation statements)

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“…Nutrient export rates from forested areas are summarised in Table 8. Studies have included predominantly Eucalyptus and Nothofagus forest, with a small area of secondary regrowth forest after logging (Campbell 1978). However, as with any nutrient study it is important to consider if storm events were monitored.…”

Section: Forest Nutrient Exportmentioning

confidence: 99%

“…However, as with any nutrient study it is important to consider if storm events were monitored. For example, monthly water samples were collected in the study of Campbell (1978) but it is likely that nutrient export during storm events, particularly sediment-bound P, was underestimated. In contrast, three storm flow events monitored after drought for 3 months yielded 0.01 kg TP ha −1 and 1 kg total nitrogen (TN) ha −1 in a catchment mostly unaffected by fire (Chessman 1986; Table 8).…”

Section: Forest Nutrient Exportmentioning

confidence: 99%

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A review of nitrogen and phosphorus export to waterways: context for catchment modelling

Drewry

Newham

Greene

et al. 2006

Mar. Freshwater Res.

106

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This paper reviews knowledge of nitrogen and phosphorus generation from land use and export to waterways, including studies relevant to Australia. It provides a link between current and future modelling requirements, and the context for incorporation of this knowledge into catchment models for use by catchment managers. Selected catchment models used by catchment managers are reviewed, and factors limiting their application are addressed. The review highlights the importance of dissolved N and P for overland flow and groundwater pathways, for sheep, beef and dairy grazing land use. Consequently, the effectiveness of riparian buffers to remove N and P may not be adequate. Consideration of the effects of rainfall and hydrology, dissolved P and N losses from pastures and event-based catchment-scale loads are therefore important factors that should be incorporated into catchment models. The review shows that it is likely that nutrient losses under Australian dairying conditions have many similarities to worldwide studies. Catchment models need to represent the importance of event-based loads, intensively farmed land use, management and forms of nutrients. Otherwise there is a likelihood of either underestimating nutrient losses, or potentially overestimating the effectiveness of riparian buffers.

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Section: Forest Nutrient Exportmentioning

confidence: 99%

Section: Forest Nutrient Exportmentioning

confidence: 99%

A review of nitrogen and phosphorus export to waterways: context for catchment modelling

Drewry

Newham

Greene

et al. 2006

Mar. Freshwater Res.

106

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“…Catchments which have been disturbed by human activity tend to 'leak' nutrients, and the levels in the streams draining them tend to be higher (e.g. Campbell 1978).…”

Section: Nutrients and Dissolved Solidsmentioning

confidence: 99%

Impact of timber harvesting and production on streams: A review

Campbell¹,

Doeg²

1989

Mar. Freshwater Res.

Self Cite

154

104

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Timber harvesting operations have significant effects on both water quantity and water quality. The effects on water quantity have been well documented both in Australia and elsewhere. The effects on water quality are less widely appreciated, and include elevated concentrations of dissolved salts, suspended solids and nutrients, especially during peak flow periods. Several Australian studies have failed to measure peak flow transport of suspended solids, or have measured it inadequately, thus severely underestimating transport. The major short-term effects of timber harvesting on the aquatic biota result from increased sediment input into streams or increased light through damage to, or removal of, the riparian vegetation. Sediment which settles on, or penetrates into, the stream bed is of more concern than suspended sediment, and can lead to long-term deleterious changes to fish and invertebrate populations. Increased light causes an increase in stream primary production which may increase invertebrate densities, and alter community composition. These biological consequences have not yet been adequately investigated in Australia. Longer-term effects, as yet not investigated in Australia, include changes to stream structure as the regrowth forest has fewer large logs to fall into the stream. These large logs play a major role as habitat and retention structures in streams. There has been no attempt to evaluate the effects of timber production activities, including pesticide use and fuel reduction burning, on the Australian stream biota. Likewise, although buffer zones are widely advocated as a protection measure for streams in Australia, there have been no studies to evaluate their effectiveness.

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The impact of European settlement on Bolin Billabong, a Yarra River floodplain lake, Melbourne, Australia

Leahy

Tibby

Kershaw

et al. 2005

River Research & Apps

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Bolin Billabong is a shallow, eutrophic and turbid oxbow lake located on the lower Yarra River floodplain, in suburban Melbourne (Victoria, Australia). A combination of radiometric dating, historical data, fossil markers and mineral magnetics has been used to develop a sediment chronology for the billabong that extends from about ad 1120 to the present. Fossil pollen and diatoms have been used to provide a high-resolution record of vegetation and aquatic ecosystem change through this period, with the aim of developing a better understanding of human disturbance in floodplain lakes. Specifically we aim to investigate the development and trajectory of eutrophic and turbid conditions that exist in the lake at present.The pre-European contact diatom assemblage at Bolin Billabong is dominated by a planktonic taxon, Cyclotella stelligera, and had very low diversity, with little evidence of species turnover. This suggests that the billabong had low nutrient concentrations and contrasts with the generally accepted notion of billabongs as naturally diverse, productive and variable systems.The initial period of European occupation was characterized by catchment disturbance with high levels of erosion and sedimentation. Sedimentation rates in the post-European contact period appear to be 30 times higher than prior to European settlement. Evidence suggests that the Yarra River was not naturally turbid. Changes to the diatom assemblage, reflective of water quality perturbation following European contact, were dramatic and unprecedented. Following an initially high sedimentation rate in the post-European contact period, the sedimentation rate gradually slowed towards the present day. The increase in nutrients available to the diatom assemblage appears to have been moderate from European contact (c. ad 1840) to until around ad 1920, then more pronounced from this point onwards. Recent changes in the diatom assemblage at Bolin Billabong appear moderate compared with other regulated river floodplain sites studied in southeastern Australia.

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Imputs and Outputs of Water and Phosphorus from Four Victorian Catchments

Cited by 15 publications

References 0 publications

A review of nitrogen and phosphorus export to waterways: context for catchment modelling

A review of nitrogen and phosphorus export to waterways: context for catchment modelling

Impact of timber harvesting and production on streams: A review

The impact of European settlement on Bolin Billabong, a Yarra River floodplain lake, Melbourne, Australia

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